This patch set add perf callchain(FP/DWARF) support for RISC-V.
It comes from the csky version callchain support with some
slight modifications. The patchset base on Linux 5.3.
Changes since v3:
- Add more strict check for unwind_frame_kernel
- update for kernel 5.3
Changes since v2:
- fix inconsistent comment
- force to build kernel with -fno-omit-frame-pointer if perf
event is enabled
Changes since v1:
- simplify implementation and code convention
Cc: Paul Walmsley <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: linux-riscv <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Guo Ren <[email protected]>
Mao Han (3):
riscv: Add perf callchain support
riscv: Add support for perf registers sampling
riscv: Add support for libdw
arch/riscv/Kconfig | 2 +
arch/riscv/Makefile | 3 +
arch/riscv/include/uapi/asm/perf_regs.h | 42 ++++++++++
arch/riscv/kernel/Makefile | 4 +-
arch/riscv/kernel/perf_callchain.c | 115 ++++++++++++++++++++++++++
arch/riscv/kernel/perf_regs.c | 44 ++++++++++
tools/arch/riscv/include/uapi/asm/perf_regs.h | 42 ++++++++++
tools/perf/Makefile.config | 6 +-
tools/perf/arch/riscv/Build | 1 +
tools/perf/arch/riscv/Makefile | 3 +
tools/perf/arch/riscv/include/perf_regs.h | 96 +++++++++++++++++++++
tools/perf/arch/riscv/util/Build | 2 +
tools/perf/arch/riscv/util/dwarf-regs.c | 72 ++++++++++++++++
tools/perf/arch/riscv/util/unwind-libdw.c | 57 +++++++++++++
14 files changed, 487 insertions(+), 2 deletions(-)
create mode 100644 arch/riscv/include/uapi/asm/perf_regs.h
create mode 100644 arch/riscv/kernel/perf_callchain.c
create mode 100644 arch/riscv/kernel/perf_regs.c
create mode 100644 tools/arch/riscv/include/uapi/asm/perf_regs.h
create mode 100644 tools/perf/arch/riscv/Build
create mode 100644 tools/perf/arch/riscv/Makefile
create mode 100644 tools/perf/arch/riscv/include/perf_regs.h
create mode 100644 tools/perf/arch/riscv/util/Build
create mode 100644 tools/perf/arch/riscv/util/dwarf-regs.c
create mode 100644 tools/perf/arch/riscv/util/unwind-libdw.c
--
2.7.4
This patch add support for perf callchain sampling on riscv platform.
The return address of leaf function is retrieved from pt_regs as
it is not saved in the outmost frame.
Signed-off-by: Mao Han <[email protected]>
Cc: Paul Walmsley <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: linux-riscv <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Guo Ren <[email protected]>
---
arch/riscv/Makefile | 3 +
arch/riscv/kernel/Makefile | 3 +-
arch/riscv/kernel/perf_callchain.c | 115 +++++++++++++++++++++++++++++++++++++
3 files changed, 120 insertions(+), 1 deletion(-)
create mode 100644 arch/riscv/kernel/perf_callchain.c
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 7a117be..946565b 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -54,6 +54,9 @@ endif
ifeq ($(CONFIG_MODULE_SECTIONS),y)
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
endif
+ifeq ($(CONFIG_PERF_EVENTS),y)
+ KBUILD_CFLAGS += -fno-omit-frame-pointer
+endif
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index 2420d37..b1bea89 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_MODULE_SECTIONS) += module-sections.o
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o
obj-$(CONFIG_DYNAMIC_FTRACE) += mcount-dyn.o
-obj-$(CONFIG_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o
+obj-$(CONFIG_PERF_EVENTS) += perf_callchain.o
clean:
diff --git a/arch/riscv/kernel/perf_callchain.c b/arch/riscv/kernel/perf_callchain.c
new file mode 100644
index 0000000..d75d15c
--- /dev/null
+++ b/arch/riscv/kernel/perf_callchain.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */
+
+#include <linux/perf_event.h>
+#include <linux/uaccess.h>
+
+/* Kernel callchain */
+struct stackframe {
+ unsigned long fp;
+ unsigned long ra;
+};
+
+static int unwind_frame_kernel(struct stackframe *frame)
+{
+ if (kstack_end((void *)frame->fp))
+ return -EPERM;
+ if (frame->fp & 0x3 || frame->fp < TASK_SIZE)
+ return -EPERM;
+ if (frame->fp < CONFIG_PAGE_OFFSET)
+ return -EPERM;
+
+ *frame = *((struct stackframe *)frame->fp - 1);
+ if (__kernel_text_address(frame->ra)) {
+ int graph = 0;
+
+ frame->ra = ftrace_graph_ret_addr(NULL, &graph, frame->ra,
+ NULL);
+ }
+ return 0;
+}
+
+static void notrace walk_stackframe(struct stackframe *fr,
+ struct perf_callchain_entry_ctx *entry)
+{
+ do {
+ perf_callchain_store(entry, fr->ra);
+ } while (unwind_frame_kernel(fr) >= 0);
+}
+
+/*
+ * Get the return address for a single stackframe and return a pointer to the
+ * next frame tail.
+ */
+static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry,
+ unsigned long fp, unsigned long reg_ra)
+{
+ struct stackframe buftail;
+ unsigned long ra = 0;
+ unsigned long *user_frame_tail =
+ (unsigned long *)(fp - sizeof(struct stackframe));
+
+ /* Check accessibility of one struct frame_tail beyond */
+ if (!access_ok(user_frame_tail, sizeof(buftail)))
+ return 0;
+ if (__copy_from_user_inatomic(&buftail, user_frame_tail,
+ sizeof(buftail)))
+ return 0;
+
+ if (reg_ra != 0)
+ ra = reg_ra;
+ else
+ ra = buftail.ra;
+
+ fp = buftail.fp;
+ perf_callchain_store(entry, ra);
+
+ return fp;
+}
+
+/*
+ * This will be called when the target is in user mode
+ * This function will only be called when we use
+ * "PERF_SAMPLE_CALLCHAIN" in
+ * kernel/events/core.c:perf_prepare_sample()
+ *
+ * How to trigger perf_callchain_[user/kernel] :
+ * $ perf record -e cpu-clock --call-graph fp ./program
+ * $ perf report --call-graph
+ *
+ * On RISC-V platform, the program being sampled and the C library
+ * need to be compiled with -fno-omit-frame-pointer, otherwise
+ * the user stack will not contain function frame.
+ */
+void perf_callchain_user(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
+{
+ unsigned long fp = 0;
+
+ /* RISC-V does not support virtualization. */
+ if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
+ return;
+
+ fp = regs->s0;
+ perf_callchain_store(entry, regs->sepc);
+
+ fp = user_backtrace(entry, fp, regs->ra);
+ while (fp && !(fp & 0x3) && entry->nr < entry->max_stack)
+ fp = user_backtrace(entry, fp, 0);
+}
+
+void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
+{
+ struct stackframe fr;
+
+ /* RISC-V does not support virtualization. */
+ if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
+ pr_warn("RISC-V does not support perf in guest mode!");
+ return;
+ }
+
+ fr.fp = regs->s0;
+ fr.ra = regs->ra;
+ walk_stackframe(&fr, entry);
+}
--
2.7.4
Hi Mao,
Mao Han <[email protected]> 於 2019年8月20日 週二 下午4:57寫道：
>
> This patch add support for perf callchain sampling on riscv platform.
> The return address of leaf function is retrieved from pt_regs as
> it is not saved in the outmost frame.
>
> Signed-off-by: Mao Han <[email protected]>
> Cc: Paul Walmsley <[email protected]>
> Cc: Greentime Hu <[email protected]>
> Cc: Palmer Dabbelt <[email protected]>
> Cc: linux-riscv <[email protected]>
> Cc: Christoph Hellwig <[email protected]>
> Cc: Guo Ren <[email protected]>
> ---
> arch/riscv/Makefile | 3 +
> arch/riscv/kernel/Makefile | 3 +-
> arch/riscv/kernel/perf_callchain.c | 115 +++++++++++++++++++++++++++++++++++++
> 3 files changed, 120 insertions(+), 1 deletion(-)
> create mode 100644 arch/riscv/kernel/perf_callchain.c
>
> diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
> index 7a117be..946565b 100644
> --- a/arch/riscv/Makefile
> +++ b/arch/riscv/Makefile
> @@ -54,6 +54,9 @@ endif
> ifeq ($(CONFIG_MODULE_SECTIONS),y)
> KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
> endif
> +ifeq ($(CONFIG_PERF_EVENTS),y)
> + KBUILD_CFLAGS += -fno-omit-frame-pointer
> +endif
>
> KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
>
> diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> index 2420d37..b1bea89 100644
> --- a/arch/riscv/kernel/Makefile
> +++ b/arch/riscv/kernel/Makefile
> @@ -38,6 +38,7 @@ obj-$(CONFIG_MODULE_SECTIONS) += module-sections.o
> obj-$(CONFIG_FUNCTION_TRACER) += mcount.o ftrace.o
> obj-$(CONFIG_DYNAMIC_FTRACE) += mcount-dyn.o
>
> -obj-$(CONFIG_PERF_EVENTS) += perf_event.o
> +obj-$(CONFIG_PERF_EVENTS) += perf_event.o
> +obj-$(CONFIG_PERF_EVENTS) += perf_callchain.o
>
> clean:
> diff --git a/arch/riscv/kernel/perf_callchain.c b/arch/riscv/kernel/perf_callchain.c
> new file mode 100644
> index 0000000..d75d15c
> --- /dev/null
> +++ b/arch/riscv/kernel/perf_callchain.c
> @@ -0,0 +1,115 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. */
> +
> +#include <linux/perf_event.h>
> +#include <linux/uaccess.h>
> +
> +/* Kernel callchain */
> +struct stackframe {
> + unsigned long fp;
> + unsigned long ra;
> +};
> +
> +static int unwind_frame_kernel(struct stackframe *frame)
> +{
> + if (kstack_end((void *)frame->fp))
> + return -EPERM;
> + if (frame->fp & 0x3 || frame->fp < TASK_SIZE)
> + return -EPERM;
> + if (frame->fp < CONFIG_PAGE_OFFSET)
> + return -EPERM;
> +
> + *frame = *((struct stackframe *)frame->fp - 1);
> + if (__kernel_text_address(frame->ra)) {
> + int graph = 0;
> +
> + frame->ra = ftrace_graph_ret_addr(NULL, &graph, frame->ra,
> + NULL);
> + }
> + return 0;
> +}
> +
> +static void notrace walk_stackframe(struct stackframe *fr,
> + struct perf_callchain_entry_ctx *entry)
> +{
> + do {
> + perf_callchain_store(entry, fr->ra);
> + } while (unwind_frame_kernel(fr) >= 0);
> +}
> +
> +/*
> + * Get the return address for a single stackframe and return a pointer to the
> + * next frame tail.
> + */
> +static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry,
> + unsigned long fp, unsigned long reg_ra)
> +{
> + struct stackframe buftail;
> + unsigned long ra = 0;
> + unsigned long *user_frame_tail =
> + (unsigned long *)(fp - sizeof(struct stackframe));
> +
> + /* Check accessibility of one struct frame_tail beyond */
> + if (!access_ok(user_frame_tail, sizeof(buftail)))
> + return 0;
> + if (__copy_from_user_inatomic(&buftail, user_frame_tail,
> + sizeof(buftail)))
> + return 0;
> +
> + if (reg_ra != 0)
> + ra = reg_ra;
> + else
> + ra = buftail.ra;
> +
> + fp = buftail.fp;
> + perf_callchain_store(entry, ra);
> +
> + return fp;
> +}
> +
> +/*
> + * This will be called when the target is in user mode
> + * This function will only be called when we use
> + * "PERF_SAMPLE_CALLCHAIN" in
> + * kernel/events/core.c:perf_prepare_sample()
> + *
> + * How to trigger perf_callchain_[user/kernel] :
> + * $ perf record -e cpu-clock --call-graph fp ./program
> + * $ perf report --call-graph
> + *
> + * On RISC-V platform, the program being sampled and the C library
> + * need to be compiled with -fno-omit-frame-pointer, otherwise
> + * the user stack will not contain function frame.
> + */
> +void perf_callchain_user(struct perf_callchain_entry_ctx *entry,
> + struct pt_regs *regs)
> +{
> + unsigned long fp = 0;
> +
> + /* RISC-V does not support virtualization. */
> + if (perf_guest_cbs && perf_guest_cbs->is_in_guest())
> + return;
> +
> + fp = regs->s0;
> + perf_callchain_store(entry, regs->sepc);
> +
> + fp = user_backtrace(entry, fp, regs->ra);
> + while (fp && !(fp & 0x3) && entry->nr < entry->max_stack)
> + fp = user_backtrace(entry, fp, 0);
> +}
> +
> +void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
> + struct pt_regs *regs)
> +{
> + struct stackframe fr;
> +
> + /* RISC-V does not support virtualization. */
> + if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) {
> + pr_warn("RISC-V does not support perf in guest mode!");
> + return;
> + }
> +
> + fr.fp = regs->s0;
> + fr.ra = regs->ra;
> + walk_stackframe(&fr, entry);
> +}
> --
> 2.7.4
>
Not sure if I did something wrong. I encounter a build error when I
try to build tools/perf/tests
CC arch/riscv/util/dwarf-regs.o
arch/riscv/util/dwarf-regs.c:64:5: error: no previous prototype for
‘regs_query_register_offset’ [-Werror=missing-prototypes]
I simply add its prototype and it could be built pass.
This is my testing results.
# ./perf test
1: vmlinux symtab matches kallsyms : Skip
2: Detect openat syscall event : FAILED!
3: Detect openat syscall event on all cpus : FAILED!
4: Read samples using the mmap interface : FAILED!
5: Test data source output : Ok
6: Parse event definition strings : FAILED!
7: Simple expression parser : Ok
8: PERF_RECORD_* events & perf_sample fields : FAILED!
9: Parse perf pmu format : Ok
10: DSO data read : Ok
11: DSO data cache : Ok
12: DSO data reopen : Ok
13: Roundtrip evsel->name : Ok
14: Parse sched tracepoints fields : FAILED!
15: syscalls:sys_enter_openat event fields : FAILED!
16: Setup struct perf_event_attr : FAILED!
17: Match and link multiple hists : Ok
18: 'import perf' in python : FAILED!
19: Breakpoint overflow signal handler : FAILED!
20: Breakpoint overflow sampling : FAILED!
21: Breakpoint accounting : Skip
22: Watchpoint :
22.1: Read Only Watchpoint : FAILED!
22.2: Write Only Watchpoint : FAILED!
22.3: Read / Write Watchpoint : FAILED!
22.4: Modify Watchpoint : FAILED!
23: Number of exit events of a simple workload : Ok
24: Software clock events period values : Ok
25: Object code reading : Ok
26: Sample parsing : Ok
27: Use a dummy software event to keep tracking : Ok
28: Parse with no sample_id_all bit set : Ok
29: Filter hist entries : Ok
30: Lookup mmap thread : Ok
31: Share thread mg : Ok
32: Sort output of hist entries : Ok
33: Cumulate child hist entries : Ok
34: Track with sched_switch : Ok
35: Filter fds with revents mask in a fdarray : Ok
36: Add fd to a fdarray, making it autogrow : Ok
37: kmod_path__parse : Ok
38: Thread map : Ok
39: LLVM search and compile :
39.1: Basic BPF llvm compile : Skip
39.2: kbuild searching : Skip
39.3: Compile source for BPF prologue generation : Skip
39.4: Compile source for BPF relocation : Skip
40: Session topology : FAILED!
41: BPF filter :
41.1: Basic BPF filtering : Skip
41.2: BPF pinning : Skip
41.3: BPF relocation checker : Skip
42: Synthesize thread map : Ok
43: Remove thread map : Ok
44: Synthesize cpu map : Ok
45: Synthesize stat config : Ok
46: Synthesize stat : Ok
47: Synthesize stat round : Ok
48: Synthesize attr update : Ok
49: Event times : Ok
50: Read backward ring buffer : Skip
51: Print cpu map : Ok
52: Probe SDT events : Skip
53: is_printable_array : Ok
54: Print bitmap : Ok
55: perf hooks : Ok
56: builtin clang support : Skip (not
compiled in)
57: unit_number__scnprintf : Ok
58: mem2node : Ok
59: time utils : Ok
60: map_groups__merge_in : Ok
61: probe libc's inet_pton & backtrace it with ping : FAILED!
62: Add vfs_getname probe to get syscall args filenames : FAILED!
63: Check open filename arg using perf trace + vfs_getname: Skip
64: Use vfs_getname probe to get syscall args filenames : FAILED!
65: Zstd perf.data compression/decompression : Skip
I also try the command that Paul pointed out.
./perf record -e cpu-clock --call-graph fp /bin/ls
It works fine now. It can generate a perf.data now.
Hi Greentime,
On Wed, Aug 21, 2019 at 05:16:13PM +0800, Greentime Hu wrote:
> Hi Mao,
>
> Mao Han <[email protected]> 於 2019年8月20日 週二 下午4:57寫道：
> >
> > This patch add support for perf callchain sampling on riscv platform.
> > The return address of leaf function is retrieved from pt_regs as
> > it is not saved in the outmost frame.
> >
> >
>
> Not sure if I did something wrong. I encounter a build error when I
> try to build tools/perf/tests
>
> CC arch/riscv/util/dwarf-regs.o
> arch/riscv/util/dwarf-regs.c:64:5: error: no previous prototype for
> ‘regs_query_register_offset’ [-Werror=missing-prototypes]
>
This seems becasue I didn't add PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
in tools/perf/arch/riscv/Makefile so the prototype in
./util/include/dwarf-regs.h is not declared. I'll add that in the next
version.
> I simply add its prototype and it could be built pass.
> This is my testing results.
> # ./perf test
> 1: vmlinux symtab matches kallsyms : Skip
> 2: Detect openat syscall event : FAILED!
> 3: Detect openat syscall event on all cpus : FAILED!
> 4: Read samples using the mmap interface : FAILED!
> 5: Test data source output : Ok
> 6: Parse event definition strings : FAILED!
> 7: Simple expression parser : Ok
> 8: PERF_RECORD_* events & perf_sample fields : FAILED!
> 9: Parse perf pmu format : Ok
> 10: DSO data read : Ok
> 11: DSO data cache : Ok
> 12: DSO data reopen : Ok
> 13: Roundtrip evsel->name : Ok
> 14: Parse sched tracepoints fields : FAILED!
> 15: syscalls:sys_enter_openat event fields : FAILED!
> 16: Setup struct perf_event_attr : FAILED!
> 17: Match and link multiple hists : Ok
> 18: 'import perf' in python : FAILED!
>
> 19: Breakpoint overflow signal handler : FAILED!
> 20: Breakpoint overflow sampling : FAILED!
> 21: Breakpoint accounting : Skip
> 22: Watchpoint :
> 22.1: Read Only Watchpoint : FAILED!
> 22.2: Write Only Watchpoint : FAILED!
> 22.3: Read / Write Watchpoint : FAILED!
> 22.4: Modify Watchpoint : FAILED!
> 23: Number of exit events of a simple workload : Ok
> 24: Software clock events period values : Ok
> 25: Object code reading : Ok
> 26: Sample parsing : Ok
> 27: Use a dummy software event to keep tracking : Ok
> 28: Parse with no sample_id_all bit set : Ok
> 29: Filter hist entries : Ok
> 30: Lookup mmap thread : Ok
> 31: Share thread mg : Ok
> 32: Sort output of hist entries : Ok
> 33: Cumulate child hist entries : Ok
> 34: Track with sched_switch : Ok
> 35: Filter fds with revents mask in a fdarray : Ok
> 36: Add fd to a fdarray, making it autogrow : Ok
> 37: kmod_path__parse : Ok
> 38: Thread map : Ok
> 39: LLVM search and compile :
> 39.1: Basic BPF llvm compile : Skip
> 39.2: kbuild searching : Skip
> 39.3: Compile source for BPF prologue generation : Skip
> 39.4: Compile source for BPF relocation : Skip
> 40: Session topology : FAILED!
> 41: BPF filter :
> 41.1: Basic BPF filtering : Skip
> 41.2: BPF pinning : Skip
> 41.3: BPF relocation checker : Skip
> 42: Synthesize thread map : Ok
> 43: Remove thread map : Ok
> 44: Synthesize cpu map : Ok
> 45: Synthesize stat config : Ok
> 46: Synthesize stat : Ok
> 47: Synthesize stat round : Ok
> 48: Synthesize attr update : Ok
> 49: Event times : Ok
> 50: Read backward ring buffer : Skip
> 51: Print cpu map : Ok
> 52: Probe SDT events : Skip
> 53: is_printable_array : Ok
> 54: Print bitmap : Ok
> 55: perf hooks : Ok
> 56: builtin clang support : Skip (not
> compiled in)
> 57: unit_number__scnprintf : Ok
> 58: mem2node : Ok
> 59: time utils : Ok
> 60: map_groups__merge_in : Ok
> 61: probe libc's inet_pton & backtrace it with ping : FAILED!
> 62: Add vfs_getname probe to get syscall args filenames : FAILED!
> 63: Check open filename arg using perf trace + vfs_getname: Skip
> 64: Use vfs_getname probe to get syscall args filenames : FAILED!
> 65: Zstd perf.data compression/decompression : Skip
>
The perf test result I got is quiet similar to yours, but with 5
less testcases.
1: vmlinux symtab matches kallsyms : Skip
2: Detect openat syscall event : FAILED!
3: Detect openat syscall event on all cpus : FAILED!
4: Read samples using the mmap interface : FAILED!
5: Test data source output : Ok
6: Parse event definition strings : FAILED!
7: Simple expression parser : Ok
8: PERF_RECORD_* events & perf_sample fields : FAILED!
9: Parse perf pmu format : Ok
10: DSO data read : Ok
11: DSO data cache : Ok
12: DSO data reopen : Ok
13: Roundtrip evsel->name : Ok
14: Parse sched tracepoints fields : FAILED!
15: syscalls:sys_enter_openat event fields : FAILED!
16: Setup struct perf_event_attr : Skip
17: Match and link multiple hists : Ok
18: 'import perf' in python : Ok
19: Breakpoint overflow signal handler : FAILED!
20: Breakpoint overflow sampling : FAILED!
21: Breakpoint accounting : Skip
22: Watchpoint :
22.1: Read Only Watchpoint : FAILED!
22.2: Write Only Watchpoint : FAILED!
22.3: Read / Write Watchpoint : FAILED!
22.4: Modify Watchpoint : FAILED!
23: Number of exit events of a simple workload : Ok
24: Software clock events period values : Ok
25: Object code reading : Ok
26: Sample parsing : Ok
27: Use a dummy software event to keep tracking: Ok
28: Parse with no sample_id_all bit set : Ok
29: Filter hist entries : Ok
30: Lookup mmap thread : Ok
31: Share thread mg : Ok
32: Sort output of hist entries : Ok
33: Cumulate child hist entries : Ok
34: Track with sched_switch : Ok
35: Filter fds with revents mask in a fdarray : Ok
36: Add fd to a fdarray, making it autogrow : Ok
37: kmod_path__parse : Ok
38: Thread map : Ok
39: LLVM search and compile :
39.1: Basic BPF llvm compile : Skip
39.2: kbuild searching : Skip
39.3: Compile source for BPF prologue generation: Skip
39.4: Compile source for BPF relocation : Skip
40: Session topology : FAILED!
41: BPF filter :
41.1: Basic BPF filtering : Skip
41.2: BPF pinning : Skip
41.3: BPF relocation checker : Skip
42: Synthesize thread map : Ok
43: Remove thread map : Ok
44: Synthesize cpu map : Ok
45: Synthesize stat config : Ok
46: Synthesize stat : Ok
47: Synthesize stat round : Ok
48: Synthesize attr update : Ok
49: Event times : Ok
50: Read backward ring buffer : Skip
51: Print cpu map : Ok
52: Probe SDT events : Skip
53: is_printable_array : Ok
54: Print bitmap : Ok
55: perf hooks : Ok
56: builtin clang support : Skip (not compiled in)
57: unit_number__scnprintf : Ok
58: mem2node : Ok
59: time utils : Ok
60: map_groups__merge_in : Ok
The comparison before/after applied this patch set:
/tools/perf/util# diff perf_test_before perf_test_after
1d0
< # perf test
8c7
< 7: Simple expression parser : FAILED!
---
> 7: Simple expression parser : Ok