Changlog:
- calculate stddev.
- make it works both for old kernel and new kernel.
- dynamically inquire max vcpus and cpu isa.
This is a example result of vmexit:
# ./perf kvm-events report
Warning: Error: expected type 5 but read 4
Warning: Error: expected type 5 but read 0
Warning: unknown op '}'
Analyze events for all VCPUs:
VM-EXIT Samples Samples% Time% Avg time
APIC_ACCESS 152367 34.07% 1.74% 15.69us ( +- 2.02% )
IO_INSTRUCTION 142663 31.90% 1.76% 16.91us ( +- 2.87% )
HLT 46681 10.44% 95.87% 2816.04us ( +- 2.94% )
EPT_VIOLATION 40184 8.98% 0.15% 5.17us ( +- 1.26% )
CPUID 21284 4.76% 0.04% 2.47us ( +- 0.66% )
EXTERNAL_INTERRUPT 21215 4.74% 0.36% 23.39us ( +- 2.83% )
EXCEPTION_NMI 11723 2.62% 0.04% 5.21us ( +- 2.46% )
CR_ACCESS 5810 1.30% 0.02% 5.06us ( +- 1.01% )
PENDING_INTERRUPT 5322 1.19% 0.01% 3.69us ( +- 1.73% )
Total Samples:447249, Total events handled time:137125528.85us.
Any comments are welcome! :)
From: Xiao Guangrong <[email protected]>
Move the definitions into a separate .h file so that 'perf kvm-events' can
easily use these
Signed-off-by: Xiao Guangrong <[email protected]>
---
arch/x86/include/asm/kvm_exit.h | 229 +++++++++++++++++++++++++++++++++++++++
arch/x86/include/asm/kvm_host.h | 17 +---
arch/x86/include/asm/svm.h | 77 +-------------
arch/x86/include/asm/vmx.h | 44 +--------
arch/x86/kvm/trace.h | 89 ---------------
5 files changed, 233 insertions(+), 223 deletions(-)
create mode 100644 arch/x86/include/asm/kvm_exit.h
diff --git a/arch/x86/include/asm/kvm_exit.h b/arch/x86/include/asm/kvm_exit.h
new file mode 100644
index 0000000..b2ce7fd
--- /dev/null
+++ b/arch/x86/include/asm/kvm_exit.h
@@ -0,0 +1,229 @@
+/*
+ * The definitions in this file are shared between KVM modules
+ * and 'perf kvm-events'.
+ */
+#ifndef _X86_KVM_EXIT
+#define _X86_KVM_EXIT
+
+#define VMX_EXIT_REASONS_FAILED_VMENTRY 0x80000000
+
+#define EXIT_REASON_EXCEPTION_NMI 0
+#define EXIT_REASON_EXTERNAL_INTERRUPT 1
+#define EXIT_REASON_TRIPLE_FAULT 2
+
+#define EXIT_REASON_PENDING_INTERRUPT 7
+#define EXIT_REASON_NMI_WINDOW 8
+#define EXIT_REASON_TASK_SWITCH 9
+#define EXIT_REASON_CPUID 10
+#define EXIT_REASON_HLT 12
+#define EXIT_REASON_INVD 13
+#define EXIT_REASON_INVLPG 14
+#define EXIT_REASON_RDPMC 15
+#define EXIT_REASON_RDTSC 16
+#define EXIT_REASON_VMCALL 18
+#define EXIT_REASON_VMCLEAR 19
+#define EXIT_REASON_VMLAUNCH 20
+#define EXIT_REASON_VMPTRLD 21
+#define EXIT_REASON_VMPTRST 22
+#define EXIT_REASON_VMREAD 23
+#define EXIT_REASON_VMRESUME 24
+#define EXIT_REASON_VMWRITE 25
+#define EXIT_REASON_VMOFF 26
+#define EXIT_REASON_VMON 27
+#define EXIT_REASON_CR_ACCESS 28
+#define EXIT_REASON_DR_ACCESS 29
+#define EXIT_REASON_IO_INSTRUCTION 30
+#define EXIT_REASON_MSR_READ 31
+#define EXIT_REASON_MSR_WRITE 32
+#define EXIT_REASON_INVALID_STATE 33
+#define EXIT_REASON_MWAIT_INSTRUCTION 36
+#define EXIT_REASON_MONITOR_INSTRUCTION 39
+#define EXIT_REASON_PAUSE_INSTRUCTION 40
+#define EXIT_REASON_MCE_DURING_VMENTRY 41
+#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
+#define EXIT_REASON_APIC_ACCESS 44
+#define EXIT_REASON_EPT_VIOLATION 48
+#define EXIT_REASON_EPT_MISCONFIG 49
+#define EXIT_REASON_WBINVD 54
+#define EXIT_REASON_XSETBV 55
+
+#define SVM_EXIT_READ_CR0 0x000
+#define SVM_EXIT_READ_CR3 0x003
+#define SVM_EXIT_READ_CR4 0x004
+#define SVM_EXIT_READ_CR8 0x008
+#define SVM_EXIT_WRITE_CR0 0x010
+#define SVM_EXIT_WRITE_CR3 0x013
+#define SVM_EXIT_WRITE_CR4 0x014
+#define SVM_EXIT_WRITE_CR8 0x018
+#define SVM_EXIT_READ_DR0 0x020
+#define SVM_EXIT_READ_DR1 0x021
+#define SVM_EXIT_READ_DR2 0x022
+#define SVM_EXIT_READ_DR3 0x023
+#define SVM_EXIT_READ_DR4 0x024
+#define SVM_EXIT_READ_DR5 0x025
+#define SVM_EXIT_READ_DR6 0x026
+#define SVM_EXIT_READ_DR7 0x027
+#define SVM_EXIT_WRITE_DR0 0x030
+#define SVM_EXIT_WRITE_DR1 0x031
+#define SVM_EXIT_WRITE_DR2 0x032
+#define SVM_EXIT_WRITE_DR3 0x033
+#define SVM_EXIT_WRITE_DR4 0x034
+#define SVM_EXIT_WRITE_DR5 0x035
+#define SVM_EXIT_WRITE_DR6 0x036
+#define SVM_EXIT_WRITE_DR7 0x037
+#define SVM_EXIT_EXCP_BASE 0x040
+#define SVM_EXIT_INTR 0x060
+#define SVM_EXIT_NMI 0x061
+#define SVM_EXIT_SMI 0x062
+#define SVM_EXIT_INIT 0x063
+#define SVM_EXIT_VINTR 0x064
+#define SVM_EXIT_CR0_SEL_WRITE 0x065
+#define SVM_EXIT_IDTR_READ 0x066
+#define SVM_EXIT_GDTR_READ 0x067
+#define SVM_EXIT_LDTR_READ 0x068
+#define SVM_EXIT_TR_READ 0x069
+#define SVM_EXIT_IDTR_WRITE 0x06a
+#define SVM_EXIT_GDTR_WRITE 0x06b
+#define SVM_EXIT_LDTR_WRITE 0x06c
+#define SVM_EXIT_TR_WRITE 0x06d
+#define SVM_EXIT_RDTSC 0x06e
+#define SVM_EXIT_RDPMC 0x06f
+#define SVM_EXIT_PUSHF 0x070
+#define SVM_EXIT_POPF 0x071
+#define SVM_EXIT_CPUID 0x072
+#define SVM_EXIT_RSM 0x073
+#define SVM_EXIT_IRET 0x074
+#define SVM_EXIT_SWINT 0x075
+#define SVM_EXIT_INVD 0x076
+#define SVM_EXIT_PAUSE 0x077
+#define SVM_EXIT_HLT 0x078
+#define SVM_EXIT_INVLPG 0x079
+#define SVM_EXIT_INVLPGA 0x07a
+#define SVM_EXIT_IOIO 0x07b
+#define SVM_EXIT_MSR 0x07c
+#define SVM_EXIT_TASK_SWITCH 0x07d
+#define SVM_EXIT_FERR_FREEZE 0x07e
+#define SVM_EXIT_SHUTDOWN 0x07f
+#define SVM_EXIT_VMRUN 0x080
+#define SVM_EXIT_VMMCALL 0x081
+#define SVM_EXIT_VMLOAD 0x082
+#define SVM_EXIT_VMSAVE 0x083
+#define SVM_EXIT_STGI 0x084
+#define SVM_EXIT_CLGI 0x085
+#define SVM_EXIT_SKINIT 0x086
+#define SVM_EXIT_RDTSCP 0x087
+#define SVM_EXIT_ICEBP 0x088
+#define SVM_EXIT_WBINVD 0x089
+#define SVM_EXIT_MONITOR 0x08a
+#define SVM_EXIT_MWAIT 0x08b
+#define SVM_EXIT_MWAIT_COND 0x08c
+#define SVM_EXIT_XSETBV 0x08d
+#define SVM_EXIT_NPF 0x400
+
+#define SVM_EXIT_ERR -1
+
+#define DE_VECTOR 0
+#define DB_VECTOR 1
+#define BP_VECTOR 3
+#define OF_VECTOR 4
+#define BR_VECTOR 5
+#define UD_VECTOR 6
+#define NM_VECTOR 7
+#define DF_VECTOR 8
+#define TS_VECTOR 10
+#define NP_VECTOR 11
+#define SS_VECTOR 12
+#define GP_VECTOR 13
+#define PF_VECTOR 14
+#define MF_VECTOR 16
+#define MC_VECTOR 18
+
+#define VMX_EXIT_REASONS \
+ { EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
+ { EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
+ { EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
+ { EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
+ { EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
+ { EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
+ { EXIT_REASON_CPUID, "CPUID" }, \
+ { EXIT_REASON_HLT, "HLT" }, \
+ { EXIT_REASON_INVLPG, "INVLPG" }, \
+ { EXIT_REASON_RDPMC, "RDPMC" }, \
+ { EXIT_REASON_RDTSC, "RDTSC" }, \
+ { EXIT_REASON_VMCALL, "VMCALL" }, \
+ { EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
+ { EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
+ { EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
+ { EXIT_REASON_VMPTRST, "VMPTRST" }, \
+ { EXIT_REASON_VMREAD, "VMREAD" }, \
+ { EXIT_REASON_VMRESUME, "VMRESUME" }, \
+ { EXIT_REASON_VMWRITE, "VMWRITE" }, \
+ { EXIT_REASON_VMOFF, "VMOFF" }, \
+ { EXIT_REASON_VMON, "VMON" }, \
+ { EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
+ { EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
+ { EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
+ { EXIT_REASON_MSR_READ, "MSR_READ" }, \
+ { EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
+ { EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
+ { EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
+ { EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
+ { EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
+ { EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
+ { EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
+ { EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
+ { EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
+ { EXIT_REASON_WBINVD, "WBINVD" }
+
+#define SVM_EXIT_REASONS \
+ { SVM_EXIT_READ_CR0, "read_cr0" }, \
+ { SVM_EXIT_READ_CR3, "read_cr3" }, \
+ { SVM_EXIT_READ_CR4, "read_cr4" }, \
+ { SVM_EXIT_READ_CR8, "read_cr8" }, \
+ { SVM_EXIT_WRITE_CR0, "write_cr0" }, \
+ { SVM_EXIT_WRITE_CR3, "write_cr3" }, \
+ { SVM_EXIT_WRITE_CR4, "write_cr4" }, \
+ { SVM_EXIT_WRITE_CR8, "write_cr8" }, \
+ { SVM_EXIT_READ_DR0, "read_dr0" }, \
+ { SVM_EXIT_READ_DR1, "read_dr1" }, \
+ { SVM_EXIT_READ_DR2, "read_dr2" }, \
+ { SVM_EXIT_READ_DR3, "read_dr3" }, \
+ { SVM_EXIT_WRITE_DR0, "write_dr0" }, \
+ { SVM_EXIT_WRITE_DR1, "write_dr1" }, \
+ { SVM_EXIT_WRITE_DR2, "write_dr2" }, \
+ { SVM_EXIT_WRITE_DR3, "write_dr3" }, \
+ { SVM_EXIT_WRITE_DR5, "write_dr5" }, \
+ { SVM_EXIT_WRITE_DR7, "write_dr7" }, \
+ { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
+ { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
+ { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
+ { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
+ { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
+ { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
+ { SVM_EXIT_INTR, "interrupt" }, \
+ { SVM_EXIT_NMI, "nmi" }, \
+ { SVM_EXIT_SMI, "smi" }, \
+ { SVM_EXIT_INIT, "init" }, \
+ { SVM_EXIT_VINTR, "vintr" }, \
+ { SVM_EXIT_CPUID, "cpuid" }, \
+ { SVM_EXIT_INVD, "invd" }, \
+ { SVM_EXIT_HLT, "hlt" }, \
+ { SVM_EXIT_INVLPG, "invlpg" }, \
+ { SVM_EXIT_INVLPGA, "invlpga" }, \
+ { SVM_EXIT_IOIO, "io" }, \
+ { SVM_EXIT_MSR, "msr" }, \
+ { SVM_EXIT_TASK_SWITCH, "task_switch" }, \
+ { SVM_EXIT_SHUTDOWN, "shutdown" }, \
+ { SVM_EXIT_VMRUN, "vmrun" }, \
+ { SVM_EXIT_VMMCALL, "hypercall" }, \
+ { SVM_EXIT_VMLOAD, "vmload" }, \
+ { SVM_EXIT_VMSAVE, "vmsave" }, \
+ { SVM_EXIT_STGI, "stgi" }, \
+ { SVM_EXIT_CLGI, "clgi" }, \
+ { SVM_EXIT_SKINIT, "skinit" }, \
+ { SVM_EXIT_WBINVD, "wbinvd" }, \
+ { SVM_EXIT_MONITOR, "monitor" }, \
+ { SVM_EXIT_MWAIT, "mwait" }, \
+ { SVM_EXIT_XSETBV, "xsetbv" }, \
+ { SVM_EXIT_NPF, "npf" }
+#endif
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 4610166..51e7ebf 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -27,6 +27,7 @@
#include <asm/desc.h>
#include <asm/mtrr.h>
#include <asm/msr-index.h>
+#include <asm/kvm_exit.h>
#define KVM_MAX_VCPUS 254
#define KVM_SOFT_MAX_VCPUS 64
@@ -73,22 +74,6 @@
#define KVM_HPAGE_MASK(x) (~(KVM_HPAGE_SIZE(x) - 1))
#define KVM_PAGES_PER_HPAGE(x) (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
-#define DE_VECTOR 0
-#define DB_VECTOR 1
-#define BP_VECTOR 3
-#define OF_VECTOR 4
-#define BR_VECTOR 5
-#define UD_VECTOR 6
-#define NM_VECTOR 7
-#define DF_VECTOR 8
-#define TS_VECTOR 10
-#define NP_VECTOR 11
-#define SS_VECTOR 12
-#define GP_VECTOR 13
-#define PF_VECTOR 14
-#define MF_VECTOR 16
-#define MC_VECTOR 18
-
#define SELECTOR_TI_MASK (1 << 2)
#define SELECTOR_RPL_MASK 0x03
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index f2b83bc..8be1626 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -1,6 +1,8 @@
#ifndef __SVM_H
#define __SVM_H
+#include <asm/kvm_exit.h>
+
enum {
INTERCEPT_INTR,
INTERCEPT_NMI,
@@ -264,81 +266,6 @@ struct __attribute__ ((__packed__)) vmcb {
#define SVM_EXITINFO_REG_MASK 0x0F
-#define SVM_EXIT_READ_CR0 0x000
-#define SVM_EXIT_READ_CR3 0x003
-#define SVM_EXIT_READ_CR4 0x004
-#define SVM_EXIT_READ_CR8 0x008
-#define SVM_EXIT_WRITE_CR0 0x010
-#define SVM_EXIT_WRITE_CR3 0x013
-#define SVM_EXIT_WRITE_CR4 0x014
-#define SVM_EXIT_WRITE_CR8 0x018
-#define SVM_EXIT_READ_DR0 0x020
-#define SVM_EXIT_READ_DR1 0x021
-#define SVM_EXIT_READ_DR2 0x022
-#define SVM_EXIT_READ_DR3 0x023
-#define SVM_EXIT_READ_DR4 0x024
-#define SVM_EXIT_READ_DR5 0x025
-#define SVM_EXIT_READ_DR6 0x026
-#define SVM_EXIT_READ_DR7 0x027
-#define SVM_EXIT_WRITE_DR0 0x030
-#define SVM_EXIT_WRITE_DR1 0x031
-#define SVM_EXIT_WRITE_DR2 0x032
-#define SVM_EXIT_WRITE_DR3 0x033
-#define SVM_EXIT_WRITE_DR4 0x034
-#define SVM_EXIT_WRITE_DR5 0x035
-#define SVM_EXIT_WRITE_DR6 0x036
-#define SVM_EXIT_WRITE_DR7 0x037
-#define SVM_EXIT_EXCP_BASE 0x040
-#define SVM_EXIT_INTR 0x060
-#define SVM_EXIT_NMI 0x061
-#define SVM_EXIT_SMI 0x062
-#define SVM_EXIT_INIT 0x063
-#define SVM_EXIT_VINTR 0x064
-#define SVM_EXIT_CR0_SEL_WRITE 0x065
-#define SVM_EXIT_IDTR_READ 0x066
-#define SVM_EXIT_GDTR_READ 0x067
-#define SVM_EXIT_LDTR_READ 0x068
-#define SVM_EXIT_TR_READ 0x069
-#define SVM_EXIT_IDTR_WRITE 0x06a
-#define SVM_EXIT_GDTR_WRITE 0x06b
-#define SVM_EXIT_LDTR_WRITE 0x06c
-#define SVM_EXIT_TR_WRITE 0x06d
-#define SVM_EXIT_RDTSC 0x06e
-#define SVM_EXIT_RDPMC 0x06f
-#define SVM_EXIT_PUSHF 0x070
-#define SVM_EXIT_POPF 0x071
-#define SVM_EXIT_CPUID 0x072
-#define SVM_EXIT_RSM 0x073
-#define SVM_EXIT_IRET 0x074
-#define SVM_EXIT_SWINT 0x075
-#define SVM_EXIT_INVD 0x076
-#define SVM_EXIT_PAUSE 0x077
-#define SVM_EXIT_HLT 0x078
-#define SVM_EXIT_INVLPG 0x079
-#define SVM_EXIT_INVLPGA 0x07a
-#define SVM_EXIT_IOIO 0x07b
-#define SVM_EXIT_MSR 0x07c
-#define SVM_EXIT_TASK_SWITCH 0x07d
-#define SVM_EXIT_FERR_FREEZE 0x07e
-#define SVM_EXIT_SHUTDOWN 0x07f
-#define SVM_EXIT_VMRUN 0x080
-#define SVM_EXIT_VMMCALL 0x081
-#define SVM_EXIT_VMLOAD 0x082
-#define SVM_EXIT_VMSAVE 0x083
-#define SVM_EXIT_STGI 0x084
-#define SVM_EXIT_CLGI 0x085
-#define SVM_EXIT_SKINIT 0x086
-#define SVM_EXIT_RDTSCP 0x087
-#define SVM_EXIT_ICEBP 0x088
-#define SVM_EXIT_WBINVD 0x089
-#define SVM_EXIT_MONITOR 0x08a
-#define SVM_EXIT_MWAIT 0x08b
-#define SVM_EXIT_MWAIT_COND 0x08c
-#define SVM_EXIT_XSETBV 0x08d
-#define SVM_EXIT_NPF 0x400
-
-#define SVM_EXIT_ERR -1
-
#define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
#define SVM_VMLOAD ".byte 0x0f, 0x01, 0xda"
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 31f180c..a3f823f 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -26,6 +26,7 @@
*/
#include <linux/types.h>
+#include <asm/kvm_exit.h>
/*
* Definitions of Primary Processor-Based VM-Execution Controls.
@@ -240,48 +241,6 @@ enum vmcs_field {
HOST_RIP = 0x00006c16,
};
-#define VMX_EXIT_REASONS_FAILED_VMENTRY 0x80000000
-
-#define EXIT_REASON_EXCEPTION_NMI 0
-#define EXIT_REASON_EXTERNAL_INTERRUPT 1
-#define EXIT_REASON_TRIPLE_FAULT 2
-
-#define EXIT_REASON_PENDING_INTERRUPT 7
-#define EXIT_REASON_NMI_WINDOW 8
-#define EXIT_REASON_TASK_SWITCH 9
-#define EXIT_REASON_CPUID 10
-#define EXIT_REASON_HLT 12
-#define EXIT_REASON_INVD 13
-#define EXIT_REASON_INVLPG 14
-#define EXIT_REASON_RDPMC 15
-#define EXIT_REASON_RDTSC 16
-#define EXIT_REASON_VMCALL 18
-#define EXIT_REASON_VMCLEAR 19
-#define EXIT_REASON_VMLAUNCH 20
-#define EXIT_REASON_VMPTRLD 21
-#define EXIT_REASON_VMPTRST 22
-#define EXIT_REASON_VMREAD 23
-#define EXIT_REASON_VMRESUME 24
-#define EXIT_REASON_VMWRITE 25
-#define EXIT_REASON_VMOFF 26
-#define EXIT_REASON_VMON 27
-#define EXIT_REASON_CR_ACCESS 28
-#define EXIT_REASON_DR_ACCESS 29
-#define EXIT_REASON_IO_INSTRUCTION 30
-#define EXIT_REASON_MSR_READ 31
-#define EXIT_REASON_MSR_WRITE 32
-#define EXIT_REASON_INVALID_STATE 33
-#define EXIT_REASON_MWAIT_INSTRUCTION 36
-#define EXIT_REASON_MONITOR_INSTRUCTION 39
-#define EXIT_REASON_PAUSE_INSTRUCTION 40
-#define EXIT_REASON_MCE_DURING_VMENTRY 41
-#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
-#define EXIT_REASON_APIC_ACCESS 44
-#define EXIT_REASON_EPT_VIOLATION 48
-#define EXIT_REASON_EPT_MISCONFIG 49
-#define EXIT_REASON_WBINVD 54
-#define EXIT_REASON_XSETBV 55
-
/*
* Interruption-information format
*/
@@ -480,5 +439,4 @@ enum vm_instruction_error_number {
VMXERR_ENTRY_EVENTS_BLOCKED_BY_MOV_SS = 26,
VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID = 28,
};
-
#endif
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 911d264..89cbbe5 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -183,95 +183,6 @@ TRACE_EVENT(kvm_apic,
#define KVM_ISA_VMX 1
#define KVM_ISA_SVM 2
-#define VMX_EXIT_REASONS \
- { EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
- { EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
- { EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
- { EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
- { EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
- { EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
- { EXIT_REASON_CPUID, "CPUID" }, \
- { EXIT_REASON_HLT, "HLT" }, \
- { EXIT_REASON_INVLPG, "INVLPG" }, \
- { EXIT_REASON_RDPMC, "RDPMC" }, \
- { EXIT_REASON_RDTSC, "RDTSC" }, \
- { EXIT_REASON_VMCALL, "VMCALL" }, \
- { EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
- { EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
- { EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
- { EXIT_REASON_VMPTRST, "VMPTRST" }, \
- { EXIT_REASON_VMREAD, "VMREAD" }, \
- { EXIT_REASON_VMRESUME, "VMRESUME" }, \
- { EXIT_REASON_VMWRITE, "VMWRITE" }, \
- { EXIT_REASON_VMOFF, "VMOFF" }, \
- { EXIT_REASON_VMON, "VMON" }, \
- { EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
- { EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
- { EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
- { EXIT_REASON_MSR_READ, "MSR_READ" }, \
- { EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
- { EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
- { EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
- { EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
- { EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
- { EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" }, \
- { EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
- { EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
- { EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
- { EXIT_REASON_WBINVD, "WBINVD" }
-
-#define SVM_EXIT_REASONS \
- { SVM_EXIT_READ_CR0, "read_cr0" }, \
- { SVM_EXIT_READ_CR3, "read_cr3" }, \
- { SVM_EXIT_READ_CR4, "read_cr4" }, \
- { SVM_EXIT_READ_CR8, "read_cr8" }, \
- { SVM_EXIT_WRITE_CR0, "write_cr0" }, \
- { SVM_EXIT_WRITE_CR3, "write_cr3" }, \
- { SVM_EXIT_WRITE_CR4, "write_cr4" }, \
- { SVM_EXIT_WRITE_CR8, "write_cr8" }, \
- { SVM_EXIT_READ_DR0, "read_dr0" }, \
- { SVM_EXIT_READ_DR1, "read_dr1" }, \
- { SVM_EXIT_READ_DR2, "read_dr2" }, \
- { SVM_EXIT_READ_DR3, "read_dr3" }, \
- { SVM_EXIT_WRITE_DR0, "write_dr0" }, \
- { SVM_EXIT_WRITE_DR1, "write_dr1" }, \
- { SVM_EXIT_WRITE_DR2, "write_dr2" }, \
- { SVM_EXIT_WRITE_DR3, "write_dr3" }, \
- { SVM_EXIT_WRITE_DR5, "write_dr5" }, \
- { SVM_EXIT_WRITE_DR7, "write_dr7" }, \
- { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
- { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
- { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
- { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
- { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
- { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
- { SVM_EXIT_INTR, "interrupt" }, \
- { SVM_EXIT_NMI, "nmi" }, \
- { SVM_EXIT_SMI, "smi" }, \
- { SVM_EXIT_INIT, "init" }, \
- { SVM_EXIT_VINTR, "vintr" }, \
- { SVM_EXIT_CPUID, "cpuid" }, \
- { SVM_EXIT_INVD, "invd" }, \
- { SVM_EXIT_HLT, "hlt" }, \
- { SVM_EXIT_INVLPG, "invlpg" }, \
- { SVM_EXIT_INVLPGA, "invlpga" }, \
- { SVM_EXIT_IOIO, "io" }, \
- { SVM_EXIT_MSR, "msr" }, \
- { SVM_EXIT_TASK_SWITCH, "task_switch" }, \
- { SVM_EXIT_SHUTDOWN, "shutdown" }, \
- { SVM_EXIT_VMRUN, "vmrun" }, \
- { SVM_EXIT_VMMCALL, "hypercall" }, \
- { SVM_EXIT_VMLOAD, "vmload" }, \
- { SVM_EXIT_VMSAVE, "vmsave" }, \
- { SVM_EXIT_STGI, "stgi" }, \
- { SVM_EXIT_CLGI, "clgi" }, \
- { SVM_EXIT_SKINIT, "skinit" }, \
- { SVM_EXIT_WBINVD, "wbinvd" }, \
- { SVM_EXIT_MONITOR, "monitor" }, \
- { SVM_EXIT_MWAIT, "mwait" }, \
- { SVM_EXIT_XSETBV, "xsetbv" }, \
- { SVM_EXIT_NPF, "npf" }
-
/*
* Tracepoint for kvm guest exit:
*/
--
1.7.7.5
From: Xiao Guangrong <[email protected]>
'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
mmio read emulated time for the old kernel, in order to trace mmio read
event more exactly, we add kvm_mmio_begin to trace the time when mmio read
begins
Also, add kvm_mmio_done to trace the time when mmio/pio is completed
Signed-off-by: Xiao Guangrong <[email protected]>
---
arch/x86/kvm/x86.c | 21 ++++++++++++++-------
include/trace/events/kvm.h | 37 +++++++++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2bd77a3..6750978 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3766,9 +3766,12 @@ mmio:
/*
* Is this MMIO handled locally?
*/
+ trace_kvm_mmio_begin(vcpu->vcpu_id, write, gpa);
handled = ops->read_write_mmio(vcpu, gpa, bytes, val);
- if (handled == bytes)
+ if (handled == bytes) {
+ trace_kvm_mmio_done(vcpu->vcpu_id);
return X86EMUL_CONTINUE;
+ }
gpa += handled;
bytes -= handled;
@@ -3934,6 +3937,7 @@ static int emulator_pio_in_out(struct kvm_vcpu *vcpu, int size,
vcpu->arch.pio.size = size;
if (!kernel_pio(vcpu, vcpu->arch.pio_data)) {
+ trace_kvm_mmio_done(vcpu->vcpu_id);
vcpu->arch.pio.count = 0;
return 1;
}
@@ -4544,9 +4548,7 @@ restart:
inject_emulated_exception(vcpu);
r = EMULATE_DONE;
} else if (vcpu->arch.pio.count) {
- if (!vcpu->arch.pio.in)
- vcpu->arch.pio.count = 0;
- else
+ if (vcpu->arch.pio.in)
writeback = false;
r = EMULATE_DO_MMIO;
} else if (vcpu->mmio_needed) {
@@ -4577,8 +4579,6 @@ int kvm_fast_pio_out(struct kvm_vcpu *vcpu, int size, unsigned short port)
unsigned long val = kvm_register_read(vcpu, VCPU_REGS_RAX);
int ret = emulator_pio_out_emulated(&vcpu->arch.emulate_ctxt,
size, port, &val, 1);
- /* do not return to emulator after return from userspace */
- vcpu->arch.pio.count = 0;
return ret;
}
EXPORT_SYMBOL_GPL(kvm_fast_pio_out);
@@ -5407,6 +5407,11 @@ static int complete_mmio(struct kvm_vcpu *vcpu)
if (!(vcpu->arch.pio.count || vcpu->mmio_needed))
return 1;
+ if (vcpu->arch.pio.count && !vcpu->arch.pio.in) {
+ vcpu->arch.pio.count = 0;
+ goto exit;
+ }
+
if (vcpu->mmio_needed) {
vcpu->mmio_needed = 0;
if (!vcpu->mmio_is_write)
@@ -5423,7 +5428,7 @@ static int complete_mmio(struct kvm_vcpu *vcpu)
return 0;
}
if (vcpu->mmio_is_write)
- return 1;
+ goto exit;
vcpu->mmio_read_completed = 1;
}
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
@@ -5431,6 +5436,8 @@ static int complete_mmio(struct kvm_vcpu *vcpu)
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
if (r != EMULATE_DONE)
return 0;
+exit:
+ trace_kvm_mmio_done(vcpu->vcpu_id);
return 1;
}
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 46e3cd8..16c8a6d 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -174,6 +174,43 @@ TRACE_EVENT(kvm_mmio,
__entry->len, __entry->gpa, __entry->val)
);
+TRACE_EVENT(kvm_mmio_begin,
+ TP_PROTO(unsigned int vcpu_id, bool rw, u64 gpa),
+ TP_ARGS(vcpu_id, rw, gpa),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, vcpu_id)
+ __field(int, type)
+ __field(u64, gpa)
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->type = rw ? KVM_TRACE_MMIO_WRITE :
+ KVM_TRACE_MMIO_READ;
+ __entry->gpa = gpa;
+ ),
+
+ TP_printk("vcpu %u mmio %s gpa 0x%llx", __entry->vcpu_id,
+ __print_symbolic(__entry->type, kvm_trace_symbol_mmio),
+ __entry->gpa)
+);
+
+TRACE_EVENT(kvm_mmio_done,
+ TP_PROTO(unsigned int vcpu_id),
+ TP_ARGS(vcpu_id),
+
+ TP_STRUCT__entry(
+ __field( unsigned int, vcpu_id )
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ ),
+
+ TP_printk("vcpu %u", __entry->vcpu_id)
+);
+
#define kvm_fpu_load_symbol \
{0, "unload"}, \
{1, "load"}
--
1.7.7.5
From: Xiao Guangrong <[email protected]>
Add 'perf kvm-events' support to analyze kvm vmexit/mmio/ioport smartly
Usage:
- trace kvm events:
perf kvm-events record, or, if other tracepoints are also
interesting, we can append the events like this:
perf kvm-events record -e timer:*
- show the result:
perf kvm-events report
Signed-off-by: Xiao Guangrong <[email protected]>
---
tools/perf/Documentation/perf-kvm-events.txt | 56 ++
tools/perf/Makefile | 1 +
tools/perf/builtin-kvm-events.c | 909 ++++++++++++++++++++++++++
tools/perf/builtin.h | 1 +
tools/perf/command-list.txt | 1 +
tools/perf/perf.c | 1 +
6 files changed, 969 insertions(+), 0 deletions(-)
create mode 100644 tools/perf/Documentation/perf-kvm-events.txt
create mode 100644 tools/perf/builtin-kvm-events.c
diff --git a/tools/perf/Documentation/perf-kvm-events.txt b/tools/perf/Documentation/perf-kvm-events.txt
new file mode 100644
index 0000000..d46789a
--- /dev/null
+++ b/tools/perf/Documentation/perf-kvm-events.txt
@@ -0,0 +1,56 @@
+perf-kvm-events(1)
+============
+
+NAME
+----
+perf-kvm-events - Analyze kvm events
+
+SYNOPSIS
+--------
+[verse]
+'perf kvm-events' {record|report}
+
+DESCRIPTION
+-----------
+You can analyze some crucial kvm events and statistics with this
+'perf kvm-events' command. Currently, vmexit, mmio and ioport events
+are supported.
+
+ 'perf kvm-events record <command>' records kvm events(vmexit,
+ mmio and ioport) and the events between start and end <command>.
+ And this command produces the file "perf.data" which contains
+ tracing results of kvm events.
+
+ 'perf kvm-events report' reports statistical data which includes
+ events handled time, samples, and so on.
+
+COMMON OPTIONS
+--------------
+
+-i::
+--input=<file>::
+ Input file name. (default: perf.data unless stdin is a fifo)
+
+-v::
+--verbose::
+ Be more verbose (show symbol address, etc).
+
+-D::
+--dump-raw-trace::
+ Dump raw trace in ASCII.
+
+REPORT OPTIONS
+--------------
+--vcpu=<value>::
+ analyze events which occures on this vcpu
+
+--events=<value>::
+ events to be analyzed. Possible values: vmexit, mmio, ioport.
+-k::
+--key=<value>::
+ Sorting key. Possible values: sample(default, sort by samples number),
+time(sort by average time).
+
+SEE ALSO
+--------
+linkperf:perf[1]
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index ac86d67..ee43451 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -382,6 +382,7 @@ BUILTIN_OBJS += $(OUTPUT)builtin-probe.o
BUILTIN_OBJS += $(OUTPUT)builtin-kmem.o
BUILTIN_OBJS += $(OUTPUT)builtin-lock.o
BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o
+BUILTIN_OBJS += $(OUTPUT)builtin-kvm-events.o
BUILTIN_OBJS += $(OUTPUT)builtin-test.o
BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
diff --git a/tools/perf/builtin-kvm-events.c b/tools/perf/builtin-kvm-events.c
new file mode 100644
index 0000000..8bb191f
--- /dev/null
+++ b/tools/perf/builtin-kvm-events.c
@@ -0,0 +1,909 @@
+#include "builtin.h"
+#include "perf.h"
+#include "util/util.h"
+#include "util/cache.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/header.h"
+#include "util/parse-options.h"
+#include "util/trace-event.h"
+#include "util/debug.h"
+#include "util/debugfs.h"
+#include "util/session.h"
+#include "util/tool.h"
+
+#include <math.h>
+
+#include <linux/kvm.h>
+
+#include "../../arch/x86/include/asm/kvm_exit.h"
+
+struct event_key {
+ #define INVALID_KEY (~0ULL)
+ u64 key;
+ int info;
+};
+
+struct kvm_events_ops {
+ bool (*is_begin_event)(struct event *event, void *data,
+ struct event_key *key);
+ bool (*is_end_event)(struct event *event, void *data,
+ struct event_key *key);
+ void (*decode_key)(struct event_key *key, char decode[20]);
+ const char *name;
+};
+
+static void exit_event_get_key(struct event *event, void *data,
+ struct event_key *key)
+{
+ key->info = 0;
+ key->key = raw_field_value(event, "exit_reason", data);
+}
+
+static bool kvm_exit_event(struct event *event)
+{
+ return !strcmp(event->name, "kvm_exit");
+}
+
+static bool exit_event_begin(struct event *event, void *data,
+ struct event_key *key)
+{
+ if (kvm_exit_event(event)) {
+ exit_event_get_key(event, data, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool kvm_entry_event(struct event *event)
+{
+ return !strcmp(event->name, "kvm_entry");
+}
+
+static bool exit_event_end(struct event *event, void *data __unused,
+ struct event_key *key __unused)
+{
+ return kvm_entry_event(event);
+}
+
+struct exit_reasons_table {
+ unsigned long exit_code;
+ const char *reason;
+};
+
+struct exit_reasons_table vmx_exit_reasons[] = {
+ VMX_EXIT_REASONS
+};
+
+struct exit_reasons_table svm_exit_reasons[] = {
+ SVM_EXIT_REASONS
+};
+
+static int get_cpu_isa(void)
+{
+ FILE *f;
+ char line[512], vendor[64];
+ int ret;
+
+ f = fopen("/proc/cpuinfo", "r");
+ if (!f)
+ die("/proc/cpuinfo does not exist.\n");
+
+ while (fgets(line, sizeof(line), f))
+ if (sscanf(line, "vendor_id : %s", vendor) > 0) {
+ if (strstr(vendor, "Intel"))
+ ret = 1;
+ else if (strstr(vendor, "AMD"))
+ ret = 0;
+ else
+ break;
+ goto exit;
+ }
+
+ die("CPU vendor is unknown.\n");
+exit:
+ fclose(f);
+ return ret;
+}
+
+static const char *get_exit_reason(u64 exit_code)
+{
+ static int isa = -1;
+ int table_size = ARRAY_SIZE(svm_exit_reasons);
+ struct exit_reasons_table *table = svm_exit_reasons;
+
+ /*
+ * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
+ * traced in the old kernel.
+ */
+ if (isa < 0)
+ isa = get_cpu_isa();
+
+ if (isa == 1) {
+ table = vmx_exit_reasons;
+ table_size = ARRAY_SIZE(vmx_exit_reasons);
+ }
+
+ while (table_size--) {
+ if (table->exit_code == exit_code)
+ return table->reason;
+ table++;
+ }
+
+ die("unknown kvm exit code:%ld on %s\n", exit_code,
+ isa ? "VMX" : "SVM");
+}
+
+static void exit_event_decode_key(struct event_key *key, char decode[20])
+{
+ const char *exit_reason = get_exit_reason(key->key);
+
+ snprintf(decode, 20, "%s", exit_reason);
+}
+
+static struct kvm_events_ops exit_events = {
+ .is_begin_event = exit_event_begin,
+ .is_end_event = exit_event_end,
+ .decode_key = exit_event_decode_key,
+ .name = "VM-EXIT"
+};
+
+/*
+ * For the old kernel, we treat:
+ * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
+ * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
+ *
+ * For the new kernel, we use kvm_mmio_begin and kvm_mmio_done to make
+ * things better.
+ */
+static void mmio_event_get_key(struct event *event, void *data,
+ struct event_key *key)
+{
+ key->key = raw_field_value(event, "gpa", data);
+ key->info = raw_field_value(event, "type", data);
+}
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+
+static bool kvm_mmio_done_event(struct event *event)
+{
+ return !strcmp(event->name, "kvm_mmio_done");
+}
+
+static bool mmio_event_begin(struct event *event, void *data,
+ struct event_key *key)
+{
+ /* MMIO read begin in old kernel. */
+ if (kvm_exit_event(event))
+ return true;
+
+ /* MMIO write begin in old kernel. */
+ if (!strcmp(event->name, "kvm_mmio") &&
+ raw_field_value(event, "type", data) == KVM_TRACE_MMIO_WRITE) {
+ mmio_event_get_key(event, data, key);
+ return true;
+ }
+
+ /* MMIO read/write begin in new kernel. */
+ if (!strcmp(event->name, "kvm_mmio_begin")) {
+ mmio_event_get_key(event, data, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool mmio_event_end(struct event *event, void *data,
+ struct event_key *key)
+{
+ /* MMIO write end in old kernel. */
+ if (kvm_entry_event(event))
+ return true;
+
+ /* MMIO read end in the old kernel.*/
+ if (!strcmp(event->name, "kvm_mmio") &&
+ raw_field_value(event, "type", data) == KVM_TRACE_MMIO_READ) {
+ mmio_event_get_key(event, data, key);
+ return true;
+ }
+
+ /* MMIO read/write end event in the new kernel.*/
+ return kvm_mmio_done_event(event);
+}
+
+static void mmio_event_decode_key(struct event_key *key, char decode[20])
+{
+ snprintf(decode, 20, "%#lx:%s", key->key,
+ key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
+}
+
+static struct kvm_events_ops mmio_events = {
+ .is_begin_event = mmio_event_begin,
+ .is_end_event = mmio_event_end,
+ .decode_key = mmio_event_decode_key,
+ .name = "MMIO Access"
+};
+
+/*
+ * For the old kernel, the time of emulation pio access is from kvm_pio to
+ * kvm_entry. In the new kernel, the end time is indicated by kvm_mmio_done.
+ */
+static void ioport_event_get_key(struct event *event, void *data,
+ struct event_key *key)
+{
+ key->key = raw_field_value(event, "port", data);
+ key->info = raw_field_value(event, "rw", data);
+}
+
+static bool ioport_event_begin(struct event *event, void *data,
+ struct event_key *key)
+{
+ if (!strcmp(event->name, "kvm_pio")) {
+ ioport_event_get_key(event, data, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool ioport_event_end(struct event *event, void *data __unused,
+ struct event_key *key __unused)
+{
+ if (kvm_entry_event(event))
+ return true;
+
+ return kvm_mmio_done_event(event);
+}
+
+static void ioport_event_decode_key(struct event_key *key, char decode[20])
+{
+ snprintf(decode, 20, "%#lx:%s", key->key, key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+ .is_begin_event = ioport_event_begin,
+ .is_end_event = ioport_event_end,
+ .decode_key = ioport_event_decode_key,
+ .name = "IO Port Access"
+};
+
+static const char *report_event = "vmexit";
+struct kvm_events_ops *events_ops;
+
+static void register_kvm_events_ops(void)
+{
+ if (!strcmp(report_event, "vmexit"))
+ events_ops = &exit_events;
+ else if (!strcmp(report_event, "mmio"))
+ events_ops = &mmio_events;
+ else if (!strcmp(report_event, "ioport"))
+ events_ops = &ioport_events;
+ else
+ die("Unknown report event:%s\n", report_event);
+}
+
+struct event_stats {
+ u64 count;
+ u64 time;
+
+ /* used to calculate stddev. */
+ double mean;
+ double M2;
+};
+
+struct kvm_event {
+ struct list_head hash_entry;
+ struct rb_node rb;
+
+ struct event_key key;
+
+ struct event_stats total;
+ struct event_stats vcpu[0]; /* max vcpus */
+};
+
+struct {
+ u64 start_time;
+ struct kvm_event *last_event;
+} *vcpu_event_record;
+
+#define EVENTS_BITS 12
+#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
+
+static int kvm_max_vcpus;
+static u64 total_time;
+static u64 total_count;
+static struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
+
+#ifndef KVM_CAP_MAX_VCPUS
+#define KVM_CAP_MAX_VCPUS 66
+#endif
+
+static int kvm_max_cpus(void)
+{
+ int kvm_fd, ret;
+
+ kvm_fd = open("/dev/kvm", O_RDWR);
+ if (kvm_fd < 0)
+ die("KVM is not available.\n");
+
+ ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, KVM_CAP_MAX_VCPUS);
+
+ if (ret <= 0)
+ ret = ioctl(kvm_fd, KVM_CHECK_EXTENSION, KVM_CAP_NR_VCPUS);
+
+ if (ret <= 0)
+ die("inquiry max vcpu fail.\n");
+
+ return ret;
+}
+
+static void init_kvm_event_record(void)
+{
+ int i;
+
+ kvm_max_vcpus = kvm_max_cpus();
+
+ vcpu_event_record = zalloc(sizeof(*vcpu_event_record) * kvm_max_vcpus);
+ if (!vcpu_event_record)
+ die("zalloc.\n");
+
+ for (i = 0; i < (int)EVENTS_CACHE_SIZE; i++)
+ INIT_LIST_HEAD(&kvm_events_cache[i]);
+}
+
+static int kvm_events_hash_fn(u64 key)
+{
+ return key & (EVENTS_CACHE_SIZE - 1);
+}
+
+static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
+{
+ struct kvm_event *event;
+
+ event = zalloc(sizeof(*event) +
+ sizeof(struct event_stats) * kvm_max_vcpus);
+
+ if (!event)
+ die("Not enough memory\n");
+
+ event->key = *key;
+ return event;
+}
+
+static struct kvm_event *find_create_kvm_event(struct event_key *key)
+{
+ struct kvm_event *event;
+ struct list_head *head;
+
+ BUG_ON(key->key == INVALID_KEY);
+
+ head = &kvm_events_cache[kvm_events_hash_fn(key->key)];
+ list_for_each_entry(event, head, hash_entry)
+ if (event->key.key == key->key && event->key.info == key->info)
+ return event;
+
+ event = kvm_alloc_init_event(key);
+ list_add(&event->hash_entry, head);
+ return event;
+}
+
+#define VCPU_ID_BITS 6
+#define VCPU_ID_CACHE_SIZE (1UL << VCPU_ID_BITS)
+
+struct kvm_tid_vcpu_id {
+ struct list_head hash_entry;
+
+ u32 tid;
+ int vcpu_id;
+};
+
+static struct list_head kvm_vcpu_id_cache[VCPU_ID_CACHE_SIZE];
+
+static int kvm_tid_hash_fn(u32 tid)
+{
+ return tid & (VCPU_ID_CACHE_SIZE - 1);
+}
+
+static int get_vcpu_id(u32 tid)
+{
+ struct list_head *head;
+ struct kvm_tid_vcpu_id *tid2pid;
+
+ head = &kvm_vcpu_id_cache[kvm_tid_hash_fn(tid)];
+ list_for_each_entry(tid2pid, head, hash_entry)
+ if (tid2pid->tid == tid)
+ return tid2pid->vcpu_id;
+
+ return -1;
+}
+
+static int get_record_vcpu_id(struct event *event, u32 tid, void *data)
+{
+ struct list_head *head;
+ struct kvm_tid_vcpu_id *tid2pid;
+ int vcpu_id;
+
+ vcpu_id = get_vcpu_id(tid);
+ if (vcpu_id >= 0)
+ return vcpu_id;
+
+ /* Only kvm_entry records vcpu id. */
+ if (!kvm_entry_event(event))
+ return -1;
+
+ head = &kvm_vcpu_id_cache[kvm_tid_hash_fn(tid)];
+
+ tid2pid = zalloc(sizeof(*tid2pid));
+ if (!tid2pid)
+ die("Not enough memory\n");
+
+ tid2pid->tid = tid;
+ vcpu_id = tid2pid->vcpu_id = raw_field_value(event, "vcpu_id", data);
+ list_add(&tid2pid->hash_entry, head);
+
+ return vcpu_id;
+}
+
+static void init_kvm_tid_to_pid(void)
+{
+ int i;
+
+ for (i = 0; i < (int)VCPU_ID_CACHE_SIZE; i++)
+ INIT_LIST_HEAD(&kvm_vcpu_id_cache[i]);
+}
+
+static void handle_begin_event(struct event_key *key, int vcpu_id,
+ u64 timestamp)
+{
+ struct kvm_event *event = NULL;
+
+ if (key->key != INVALID_KEY)
+ event = find_create_kvm_event(key);
+
+ vcpu_event_record[vcpu_id].last_event = event;
+ vcpu_event_record[vcpu_id].start_time = timestamp;
+}
+
+static void update_event_stats(struct event_stats *stats, u64 time_diff)
+{
+ double delta;
+
+ stats->count++;
+ stats->time += time_diff;
+
+ delta = time_diff - stats->mean;
+ stats->mean += delta / stats->count;
+ stats->M2 += delta*(time_diff - stats->mean);
+}
+
+static double event_stats_stddev(int vcpu_id, struct kvm_event *event)
+{
+ struct event_stats *stats = &event->total;
+ double variance, variance_mean, stddev;
+
+ if (vcpu_id != -1)
+ stats = &event->vcpu[vcpu_id];
+
+ BUG_ON(!stats->count);
+
+ variance = stats->M2 / (stats->count - 1);
+ variance_mean = variance / stats->count;
+ stddev = sqrt(variance_mean);
+
+ return stddev * 100 / stats->mean;
+}
+
+static void update_kvm_event(struct kvm_event *event, int vcpu_id,
+ u64 time_diff)
+{
+ update_event_stats(&event->total, time_diff);
+ update_event_stats(&event->vcpu[vcpu_id], time_diff);
+}
+
+static void handle_end_event(struct event_key *key, int vcpu_id, u64 timestamp)
+{
+ struct kvm_event *event;
+ u64 time_begin, time_diff;
+
+ event = vcpu_event_record[vcpu_id].last_event;
+ time_begin = vcpu_event_record[vcpu_id].start_time;
+
+ /* The begin event is not caught. */
+ if (!time_begin)
+ return;
+
+ /* Both begin and end events did not get the key. */
+ if (!event && key->key == INVALID_KEY)
+ return;
+
+ if (!event)
+ event = find_create_kvm_event(key);
+
+ vcpu_event_record[vcpu_id].last_event = NULL;
+ vcpu_event_record[vcpu_id].start_time = 0;
+
+ BUG_ON(timestamp < time_begin);
+
+ time_diff = timestamp - time_begin;
+ update_kvm_event(event, vcpu_id, time_diff);
+}
+
+static void handle_kvm_event(struct event *event, void *data, u64 timestamp,
+ u32 tid)
+{
+ struct event_key key = {.key = INVALID_KEY};
+ int vcpu_id = get_record_vcpu_id(event, tid, data);
+
+ if (vcpu_id < 0)
+ return;
+
+ if (events_ops->is_begin_event(event, data, &key))
+ return handle_begin_event(&key, vcpu_id, timestamp);
+
+ if (events_ops->is_end_event(event, data, &key))
+ return handle_end_event(&key, vcpu_id, timestamp);
+}
+
+typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
+struct kvm_event_key {
+ const char *name;
+ key_cmp_fun key;
+};
+
+static int trace_vcpu = -1;
+#define GET_EVENT_KEY(member) \
+static u64 get_event_ ##member(struct kvm_event *event, int vcpu) \
+{ \
+ if (vcpu == -1) \
+ return event->total.member; \
+ \
+ return event->vcpu[vcpu].member; \
+}
+
+#define COMPARE_EVENT_KEY(member) \
+GET_EVENT_KEY(member) \
+static int compare_kvm_event_ ## member(struct kvm_event *one, \
+ struct kvm_event *two, int vcpu)\
+{ \
+ return get_event_ ##member(one, vcpu) > \
+ get_event_ ##member(two, vcpu); \
+}
+
+GET_EVENT_KEY(time);
+COMPARE_EVENT_KEY(count);
+COMPARE_EVENT_KEY(mean);
+
+#define DEF_SORT_NAME_KEY(name, compare_key) \
+ { #name, compare_kvm_event_ ## compare_key }
+
+static struct kvm_event_key keys[] = {
+ DEF_SORT_NAME_KEY(sample, count),
+ DEF_SORT_NAME_KEY(time, mean),
+ { NULL, NULL }
+};
+
+static const char *sort_key = "sample";
+static key_cmp_fun compare;
+
+static void select_key(void)
+{
+ int i;
+
+ for (i = 0; keys[i].name; i++) {
+ if (!strcmp(keys[i].name, sort_key)) {
+ compare = keys[i].key;
+ return;
+ }
+ }
+
+ die("Unknown compare key:%s\n", sort_key);
+}
+
+static struct rb_root result;
+static void insert_to_result(struct kvm_event *event, key_cmp_fun bigger,
+ int vcpu)
+{
+ struct rb_node **rb = &result.rb_node;
+ struct rb_node *parent = NULL;
+ struct kvm_event *p;
+
+ while (*rb) {
+ p = container_of(*rb, struct kvm_event, rb);
+ parent = *rb;
+
+ if (bigger(event, p, vcpu))
+ rb = &(*rb)->rb_left;
+ else
+ rb = &(*rb)->rb_right;
+ }
+
+ rb_link_node(&event->rb, parent, rb);
+ rb_insert_color(&event->rb, &result);
+}
+
+static void update_total_count(struct kvm_event *event, int vcpu)
+{
+ total_count += get_event_count(event, vcpu);
+ total_time += get_event_time(event, vcpu);
+}
+
+static bool event_is_valid(struct kvm_event *event, int vcpu)
+{
+ return get_event_count(event, vcpu);
+}
+
+static void sort_result(int vcpu)
+{
+ unsigned int i;
+ struct kvm_event *event;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+ list_for_each_entry(event, &kvm_events_cache[i], hash_entry)
+ if (event_is_valid(event, vcpu)) {
+ update_total_count(event, vcpu);
+ insert_to_result(event, compare, vcpu);
+ }
+}
+
+/* returns left most element of result, and erase it */
+static struct kvm_event *pop_from_result(void)
+{
+ struct rb_node *node = result.rb_node;
+
+ if (!node)
+ return NULL;
+
+ while (node->rb_left)
+ node = node->rb_left;
+
+ rb_erase(node, &result);
+ return container_of(node, struct kvm_event, rb);
+}
+
+static void print_vcpu_info(int vcpu)
+{
+ pr_info("Analyze events for ");
+
+ if (vcpu == -1)
+ pr_info("all VCPUs:\n\n");
+ else
+ pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void print_result(int vcpu)
+{
+ char decode[20];
+ struct kvm_event *event;
+
+ pr_info("\n\n");
+ print_vcpu_info(vcpu);
+ pr_info("%20s ", events_ops->name);
+ pr_info("%10s ", "Samples");
+ pr_info("%9s ", "Samples%");
+
+ pr_info("%9s ", "Time%");
+ pr_info("%16s ", "Avg time");
+ pr_info("\n\n");
+
+ while ((event = pop_from_result())) {
+ u64 ecount, etime;
+
+ ecount = get_event_count(event, vcpu);
+ etime = get_event_time(event, vcpu);
+
+ events_ops->decode_key(&event->key, decode);
+ pr_info("%20s ", decode);
+ pr_info("%10lu ", ecount);
+ pr_info("%8.2f%% ", (double)ecount / total_count * 100);
+ pr_info("%8.2f%% ", (double)etime / total_time * 100);
+ pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
+ event_stats_stddev(trace_vcpu, event));
+ pr_info("\n");
+ }
+
+ pr_info("\nTotal Samples:%ld, Total events handled time:%.2fus.\n\n",
+ total_count, total_time / 1e3);
+}
+
+static void process_raw_event(void *data, int __unused cpu, u64 timestamp,
+ u32 tid)
+{
+ struct event *event;
+ int type;
+
+ type = trace_parse_common_type(data);
+ event = trace_find_event(type);
+
+ return handle_kvm_event(event, data, timestamp, tid);
+}
+
+static int process_sample_event(struct perf_tool *tool __used,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel __used,
+ struct machine *machine)
+{
+ struct thread *thread = machine__findnew_thread(machine, sample->tid);
+
+ if (thread == NULL) {
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ process_raw_event(sample->raw_data, sample->cpu, sample->time,
+ sample->tid);
+
+ return 0;
+}
+
+static struct perf_tool eops = {
+ .sample = process_sample_event,
+ .comm = perf_event__process_comm,
+ .ordered_samples = true,
+};
+
+static char const *input_name = "perf.data";
+
+static int read_events(void)
+{
+ struct perf_session *session;
+
+ session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
+ if (!session)
+ die("Initializing perf session failed\n");
+
+ if (!perf_session__has_traces(session, "kvm record"))
+ return -1;
+
+ return perf_session__process_events(session, &eops);
+}
+
+static void verify_vcpu(int vcpu)
+{
+ if (vcpu != -1 && (vcpu > kvm_max_vcpus || vcpu < 0))
+ die("Unknown vcpu:%d.\n", vcpu);
+
+}
+
+static int kvm_events_report(int vcpu)
+{
+ init_kvm_event_record();
+ init_kvm_tid_to_pid();
+ verify_vcpu(vcpu);
+ select_key();
+ register_kvm_events_ops();
+ setup_pager();
+ read_events();
+ sort_result(vcpu);
+ print_result(vcpu);
+ return 0;
+}
+
+static const char * const record_args[] = {
+ "record",
+ "-a",
+ "-R",
+ "-f",
+ "-m", "1024",
+ "-c", "1",
+ "-e", "kvm:kvm_entry",
+ "-e", "kvm:kvm_exit",
+ "-e", "kvm:kvm_mmio",
+ "-e", "kvm:kvm_pio",
+};
+
+static const char * const new_event[] = {
+ "kvm_mmio_begin",
+ "kvm_mmio_done"
+};
+
+static bool kvm_events_exist(const char *event)
+{
+ char evt_path[MAXPATHLEN];
+ int fd;
+
+ snprintf(evt_path, MAXPATHLEN, "%s/kvm/%s/id", tracing_events_path,
+ event);
+
+ fd = open(evt_path, O_RDONLY);
+
+ if (fd < 0)
+ return false;
+
+ close(fd);
+
+ return true;
+}
+
+static int kvm_events_record(int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+ rec_argc += ARRAY_SIZE(new_event) * 2;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ for (j = 0; j < ARRAY_SIZE(new_event); j++)
+ if (kvm_events_exist(new_event[j])) {
+ char event[256];
+
+ sprintf(event, "kvm:%s", new_event[j]);
+
+ rec_argv[i++] = strdup("-e");
+ rec_argv[i++] = strdup(event);
+ }
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ return cmd_record(i, rec_argv, NULL);
+}
+
+static const char * const kvm_events_report_usage[] = {
+ "perf kvm events report [<options>]",
+ NULL
+};
+
+static const struct option kvm_events_report_options[] = {
+ OPT_STRING(0, "event", &report_event, "reprot event",
+ "event for reporting: vmexit, mmio, ioport"),
+ OPT_INTEGER(0, "vcpu", &trace_vcpu,
+ "vcpu id to report"),
+ OPT_STRING('k', "key", &sort_key, "sort-key",
+ "key for sorting: sample(sort by samples number)"
+ " time (sort by avg time)"),
+ OPT_END()
+};
+
+static const char * const kvm_events_usage[] = {
+ "perf kvm events [<options>] {record|report}",
+ NULL
+};
+
+static const struct option kvm_events_options[] = {
+ OPT_STRING('i', "input", &input_name, "file", "input file name"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_END()
+};
+
+int cmd_kvm_events(int argc, const char **argv, const char *prefix __used)
+{
+ argc = parse_options(argc, argv, kvm_events_options, kvm_events_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(kvm_events_usage, kvm_events_options);
+
+ symbol__init();
+
+ if (!strncmp(argv[0], "rec", 3))
+ return kvm_events_record(argc, argv);
+
+ if (!strncmp(argv[0], "report", 6)) {
+ if (argc) {
+ argc = parse_options(argc, argv,
+ kvm_events_report_options,
+ kvm_events_report_usage, 0);
+ if (argc)
+ usage_with_options(kvm_events_report_usage,
+ kvm_events_report_options);
+ }
+ return kvm_events_report(trace_vcpu);
+ }
+
+ usage_with_options(kvm_events_usage, kvm_events_options);
+ return 0;
+}
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index b382bd5..fb19e3d 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -33,6 +33,7 @@ extern int cmd_probe(int argc, const char **argv, const char *prefix);
extern int cmd_kmem(int argc, const char **argv, const char *prefix);
extern int cmd_lock(int argc, const char **argv, const char *prefix);
extern int cmd_kvm(int argc, const char **argv, const char *prefix);
+extern int cmd_kvm_events(int argc, const char **argv, const char *prefix);
extern int cmd_test(int argc, const char **argv, const char *prefix);
extern int cmd_inject(int argc, const char **argv, const char *prefix);
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index d695fe4..c5e97d8 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -22,4 +22,5 @@ perf-probe mainporcelain common
perf-kmem mainporcelain common
perf-lock mainporcelain common
perf-kvm mainporcelain common
+perf-kvm-events mainporcelain common
perf-test mainporcelain common
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2b2e225..ab85ea5 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -317,6 +317,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "kmem", cmd_kmem, 0 },
{ "lock", cmd_lock, 0 },
{ "kvm", cmd_kvm, 0 },
+ { "kvm-events", cmd_kvm_events, 0},
{ "test", cmd_test, 0 },
{ "inject", cmd_inject, 0 },
};
--
1.7.7.5
On 02/02/2012 07:26 PM, Xiao Guangrong wrote:
> From: Xiao Guangrong <[email protected]>
>
> Move the definitions into a separate .h file so that 'perf kvm-events' can
> easily use these
Why not just include vmx.h and svm.h? I don't like scattering those
definitions around.
> Signed-off-by: Xiao Guangrong <[email protected]>
> ---
> arch/x86/include/asm/kvm_exit.h | 229 +++++++++++++++++++++++++++++++++++++++
Especially as this file doesn't make a distinction between vmx and svm.
--
error compiling committee.c: too many arguments to function
On 02/02/2012 07:27 PM, Xiao Guangrong wrote:
> From: Xiao Guangrong <[email protected]>
>
> 'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
> mmio read emulated time for the old kernel, in order to trace mmio read
> event more exactly, we add kvm_mmio_begin to trace the time when mmio read
> begins
>
> Also, add kvm_mmio_done to trace the time when mmio/pio is completed
Previously, we discussed using the kvm_entry to do this. This reduces
the number of tracepoints, and is backwards compatible. What was the
conclusion?
--
error compiling committee.c: too many arguments to function
On 02/03/2012 01:30 AM, Avi Kivity wrote:
> On 02/02/2012 07:26 PM, Xiao Guangrong wrote:
>> From: Xiao Guangrong <[email protected]>
>>
>> Move the definitions into a separate .h file so that 'perf kvm-events' can
>> easily use these
>
> Why not just include vmx.h and svm.h? I don't like scattering those
> definitions around.
>
Err, if we directly include "vmx.h" and "svm.h" we should use
"#ifdef __KERNEL__" to split the definition, it is ugly i think,
but i do not have strong opinion on it, i will switch to your way :)
On 02/03/2012 01:36 AM, Avi Kivity wrote:
> On 02/02/2012 07:27 PM, Xiao Guangrong wrote:
>> From: Xiao Guangrong <[email protected]>
>>
>> 'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
>> mmio read emulated time for the old kernel, in order to trace mmio read
>> event more exactly, we add kvm_mmio_begin to trace the time when mmio read
>> begins
>>
>> Also, add kvm_mmio_done to trace the time when mmio/pio is completed
>
> Previously, we discussed using the kvm_entry to do this. This reduces
> the number of tracepoints, and is backwards compatible. What was the
> conclusion?
>
Since using kvm_entry can cause lots of unnecessary calculated, these new two
tracepoints can let the result be exacter.
And, they are only used in new kernel, we will fall back to using kvm_entry if
they are not existing, that means it does not break backwards compatible.
On 02/02/2012 07:55 PM, Xiao Guangrong wrote:
> On 02/03/2012 01:36 AM, Avi Kivity wrote:
>
> > On 02/02/2012 07:27 PM, Xiao Guangrong wrote:
> >> From: Xiao Guangrong <[email protected]>
> >>
> >> 'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
> >> mmio read emulated time for the old kernel, in order to trace mmio read
> >> event more exactly, we add kvm_mmio_begin to trace the time when mmio read
> >> begins
> >>
> >> Also, add kvm_mmio_done to trace the time when mmio/pio is completed
> >
> > Previously, we discussed using the kvm_entry to do this. This reduces
> > the number of tracepoints, and is backwards compatible. What was the
> > conclusion?
> >
>
>
> Since using kvm_entry can cause lots of unnecessary calculated, these new two
> tracepoints can let the result be exacter.
Do you have numbers on the ratio between kvm_entry traces and
kvm_mmio_begin/end traces?
> And, they are only used in new kernel, we will fall back to using kvm_entry if
> they are not existing, that means it does not break backwards compatible.
Ah ok.
--
error compiling committee.c: too many arguments to function
On 02/03/2012 01:56 AM, Avi Kivity wrote:
> On 02/02/2012 07:55 PM, Xiao Guangrong wrote:
>> On 02/03/2012 01:36 AM, Avi Kivity wrote:
>>
>>> On 02/02/2012 07:27 PM, Xiao Guangrong wrote:
>>>> From: Xiao Guangrong <[email protected]>
>>>>
>>>> 'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
>>>> mmio read emulated time for the old kernel, in order to trace mmio read
>>>> event more exactly, we add kvm_mmio_begin to trace the time when mmio read
>>>> begins
>>>>
>>>> Also, add kvm_mmio_done to trace the time when mmio/pio is completed
>>>
>>> Previously, we discussed using the kvm_entry to do this. This reduces
>>> the number of tracepoints, and is backwards compatible. What was the
>>> conclusion?
>>>
>>
>>
>> Since using kvm_entry can cause lots of unnecessary calculated, these new two
>> tracepoints can let the result be exacter.
>
> Do you have numbers on the ratio between kvm_entry traces and
> kvm_mmio_begin/end traces?
>
1: Using kvm_mmio_begin/end:
# ./perf kvm-events report --event mmio
Warning: Error: expected type 5 but read 4
Warning: Error: expected type 5 but read 0
Warning: unknown op '}'
Analyze events for all VCPUs:
MMIO Access Samples Samples% Time% Avg time
0xfee00380:W 54926 58.45% 57.32% 3.90us ( +- 0.29% )
0xfee00300:W 12906 13.73% 28.70% 8.32us ( +- 0.50% )
0xfee00300:R 12906 13.73% 7.68% 2.23us ( +- 1.27% )
0xfee00310:W 12906 13.73% 6.07% 1.76us ( +- 1.05% )
0xfee00190:R 323 0.34% 0.23% 2.65us ( +- 2.85% )
Total Samples:93967, Total events handled time:374012.26us.
2: kvm_mmio_begin/end is not used:
# ./perf kvm-events report --event mmio
Warning: Error: expected type 5 but read 4
Warning: Error: expected type 5 but read 0
Warning: unknown op '}'
Analyze events for all VCPUs:
MMIO Access Samples Samples% Time% Avg time
0xfee00380:W 54926 58.45% 42.90% 3.90us ( +- 0.29% )
0xfee00300:W 12906 13.73% 21.48% 8.32us ( +- 0.50% )
0xfee00300:R 12906 13.73% 30.26% 11.72us ( +- 1.40% )
0xfee00310:W 12906 13.73% 4.54% 1.76us ( +- 1.05% )
0xfee00190:R 323 0.34% 0.82% 12.63us ( +- 2.85% )
Total Samples:93967, Total events handled time:499755.82us.
In this sample, the time of MMIO Read has big different,
in the case 1(new tracepoints), the time is calculated by kvm_mmio_begin -> kvm_mmio(read...)
in the case 2(existing tracepoints), the time is calculated by kvm_exit -> kvm_mmio(read...)
On 02/03/2012 02:27 AM, Xiao Guangrong wrote:
> On 02/03/2012 01:56 AM, Avi Kivity wrote:
>
>> On 02/02/2012 07:55 PM, Xiao Guangrong wrote:
>>> On 02/03/2012 01:36 AM, Avi Kivity wrote:
>>>
>>>> On 02/02/2012 07:27 PM, Xiao Guangrong wrote:
>>>>> From: Xiao Guangrong <[email protected]>
>>>>>
>>>>> 'perf kvm-events' will use kvm_exit and kvm_mmio(read...) to calculate
>>>>> mmio read emulated time for the old kernel, in order to trace mmio read
>>>>> event more exactly, we add kvm_mmio_begin to trace the time when mmio read
>>>>> begins
>>>>>
>>>>> Also, add kvm_mmio_done to trace the time when mmio/pio is completed
>>>>
>>>> Previously, we discussed using the kvm_entry to do this. This reduces
>>>> the number of tracepoints, and is backwards compatible. What was the
>>>> conclusion?
>>>>
>>>
>>>
>>> Since using kvm_entry can cause lots of unnecessary calculated, these new two
>>> tracepoints can let the result be exacter.
>>
>> Do you have numbers on the ratio between kvm_entry traces and
>> kvm_mmio_begin/end traces?
>>
>
>
> 1: Using kvm_mmio_begin/end:
>
> # ./perf kvm-events report --event mmio
> Warning: Error: expected type 5 but read 4
> Warning: Error: expected type 5 but read 0
> Warning: unknown op '}'
>
>
> Analyze events for all VCPUs:
>
> MMIO Access Samples Samples% Time% Avg time
>
> 0xfee00380:W 54926 58.45% 57.32% 3.90us ( +- 0.29% )
> 0xfee00300:W 12906 13.73% 28.70% 8.32us ( +- 0.50% )
> 0xfee00300:R 12906 13.73% 7.68% 2.23us ( +- 1.27% )
> 0xfee00310:W 12906 13.73% 6.07% 1.76us ( +- 1.05% )
> 0xfee00190:R 323 0.34% 0.23% 2.65us ( +- 2.85% )
>
> Total Samples:93967, Total events handled time:374012.26us.
>
> 2: kvm_mmio_begin/end is not used:
>
> # ./perf kvm-events report --event mmio
> Warning: Error: expected type 5 but read 4
> Warning: Error: expected type 5 but read 0
> Warning: unknown op '}'
>
>
> Analyze events for all VCPUs:
>
> MMIO Access Samples Samples% Time% Avg time
>
> 0xfee00380:W 54926 58.45% 42.90% 3.90us ( +- 0.29% )
> 0xfee00300:W 12906 13.73% 21.48% 8.32us ( +- 0.50% )
> 0xfee00300:R 12906 13.73% 30.26% 11.72us ( +- 1.40% )
> 0xfee00310:W 12906 13.73% 4.54% 1.76us ( +- 1.05% )
> 0xfee00190:R 323 0.34% 0.82% 12.63us ( +- 2.85% )
>
> Total Samples:93967, Total events handled time:499755.82us.
>
> In this sample, the time of MMIO Read has big different,
> in the case 1(new tracepoints), the time is calculated by kvm_mmio_begin -> kvm_mmio(read...)
> in the case 2(existing tracepoints), the time is calculated by kvm_exit -> kvm_mmio(read...)
And the pio result:
1: Using kvm_mmio_begin/end:
# ./perf kvm-events report --event ioport --key time
Warning: Error: expected type 5 but read 4
Warning: Error: expected type 5 but read 0
Warning: unknown op '}'
Analyze events for all VCPUs:
IO Port Access Samples Samples% Time% Avg time
0x1f0:PIN 3 0.00% 0.02% 115.91us ( +- 12.55% )
0xc026:PIN 645 0.32% 4.55% 105.21us ( +- 59.73% )
0x64:PIN 114 0.06% 0.14% 18.63us ( +- 5.02% )
0xc022:PIN 457 0.23% 0.53% 17.18us ( +- 4.15% )
0x60:PIN 114 0.06% 0.11% 14.56us ( +- 7.16% )
0xc000:POUT 22512 11.30% 17.21% 11.41us ( +- 6.84% )
0x1f7:PIN 30044 15.08% 22.53% 11.19us ( +- 10.37% )
0xc024:POUT 6 0.00% 0.00% 10.60us ( +- 54.28% )
......
2: kvm_mmio_begin/end is not used:
# ./perf kvm-events report --event ioport --key time
Warning: Error: expected type 5 but read 4
Warning: Error: expected type 5 but read 0
Warning: unknown op '}'
Analyze events for all VCPUs:
IO Port Access Samples Samples% Time% Avg time
0x1f0:PIN 3 0.00% 0.02% 118.37us ( +- 12.65% )
0xc026:PIN 645 0.32% 3.54% 107.89us ( +- 58.26% )
0x64:PIN 114 0.06% 0.13% 23.04us ( +- 6.44% )
0xc022:PIN 457 0.23% 0.48% 20.63us ( +- 3.65% )
0x60:PIN 114 0.06% 0.10% 17.70us ( +- 6.41% )
0xc000:POUT 22512 11.30% 16.19% 14.14us ( +- 6.27% )
0x1f7:PIN 30044 15.08% 21.18% 13.85us ( +- 8.39% )
0xc024:POUT 6 0.00% 0.00% 13.09us ( +- 47.40% )
......
The time of case 1 is calculated by kvm_pio -> kvm_mmio_done
The time of case 2 is calculated by kvm_pio -> kvm_entry