Perf records IBS (Instruction Based Sampling) extra sample data when
'perf record --raw-samples' is used with an IBS-compatible event, on a
machine that supports IBS. IBS support is indicated in
CPUID_Fn80000001_ECX bit #10.
Up until now, users have been able to see the extra sample data solely
in raw hex format using 'perf report --dump-raw-trace'. From there,
users could decode the data either manually, or by using an external
script.
Enable the built-in 'perf report --dump-raw-trace' to do the decoding
of the extra sample data bits, so manual or external script decoding
isn't necessary.
Example usage:
sudo perf record -c 10000001 -a --raw-samples -e ibs_fetch/rand_en=1/,ibs_op/cnt_ctl=1/ -C 0,1 taskset -c 0,1 7za b -mmt2 | perf report --dump-raw-trace
Stdout contains IBS Fetch samples, e.g.:
ibs_fetch_ctl: 02170007ffffffff MaxCnt 1048560 Cnt 1048560 Lat 7 En 1 Val 1 Comp 1 IcMiss 0 PhyAddrValid 1 L1TlbPgSz 4KB L1TlbMiss 0 L2TlbMiss 0 RandEn 1 L2Miss 0
IbsFetchLinAd: 000056016b2ead40
IbsFetchPhysAd: 000000115cedfd40
ic_ibs_ext_ctl: 0000000000000000 IbsItlbRefillLat 0
..and IBS Op samples, e.g.:
ibs_op_ctl: 0000009e009e8968 MaxCnt 10000000 En 1 Val 1 CntCtl 1=uOps CurCnt 158
IbsOpRip: 000056016b2ea73d
ibs_op_data: 00000000000b0002 CompToRetCtr 2 TagToRetCtr 11 BrnRet 0 RipInvalid 0 BrnFuse 0 Microcode 0
ibs_op_data2: 0000000000000002 CacheHitSt 0=M-state RmtNode 0 DataSrc 2=Local node cache
ibs_op_data3: 0000000000c60002 LdOp 0 StOp 1 DcL1TlbMiss 0 DcL2TlbMiss 0 DcL1TlbHit2M 0 DcL1TlbHit1G 0 DcL2TlbHit2M 0 DcMiss 0 DcMisAcc 0 DcWcMemAcc 0 DcUcMemAcc 0 DcLockedOp 0 DcMissNoMabAlloc 0 DcLinAddrValid 1 DcPhyAddrValid 1 DcL2TlbHit1G 0 L2Miss 0 SwPf 0 OpMemWidth 4 bytes OpDcMissOpenMemReqs 0 DcMissLat 0 TlbRefillLat 0
IbsDCLinAd: 00007f133c319ce0
IbsDCPhysAd: 0000000270485ce0
Signed-off-by: Kim Phillips <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Joao Martins <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Michael Petlan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Robert Richter <[email protected]>
Cc: Stephane Eranian <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
tools/perf/util/Build | 1 +
tools/perf/util/amd-sample-raw.c | 290 +++++++++++++++++++++++++++++++
tools/perf/util/sample-raw.c | 8 +
tools/perf/util/sample-raw.h | 6 +-
4 files changed, 304 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/util/amd-sample-raw.c
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 2d4fa1304178..f2914d5bed6e 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -59,6 +59,7 @@ perf-y += pstack.o
perf-y += session.o
perf-y += sample-raw.o
perf-y += s390-sample-raw.o
+perf-y += amd-sample-raw.o
perf-$(CONFIG_TRACE) += syscalltbl.o
perf-y += ordered-events.o
perf-y += namespaces.o
diff --git a/tools/perf/util/amd-sample-raw.c b/tools/perf/util/amd-sample-raw.c
new file mode 100644
index 000000000000..fc1f670e8856
--- /dev/null
+++ b/tools/perf/util/amd-sample-raw.c
@@ -0,0 +1,290 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD specific. Provide textual annotation for IBS raw sample data.
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include <linux/string.h>
+#include <asm/amd-ibs.h>
+
+#include "debug.h"
+#include "session.h"
+#include "evlist.h"
+#include "sample-raw.h"
+#include "pmu-events/pmu-events.h"
+
+static u32 cpu_family, cpu_model, ibs_fetch_type, ibs_op_type;
+
+static void pr_ibs_fetch_ctl(union ibs_fetch_ctl reg)
+{
+ const char * const ic_miss_strs[] = {
+ " IcMiss 0",
+ " IcMiss 1",
+ };
+ const char * const l1tlb_pgsz_strs[] = {
+ " L1TlbPgSz 4KB",
+ " L1TlbPgSz 2MB",
+ " L1TlbPgSz 1GB",
+ " L1TlbPgSz RESERVED"
+ };
+ const char * const l1tlb_pgsz_strs_erratum1347[] = {
+ " L1TlbPgSz 4KB",
+ " L1TlbPgSz 16KB",
+ " L1TlbPgSz 2MB",
+ " L1TlbPgSz 1GB"
+ };
+ const char *ic_miss_str = NULL;
+ const char *l1tlb_pgsz_str = NULL;
+
+ if (cpu_family == 0x19 && cpu_model < 0x10) {
+ /*
+ * Erratum #1238 workaround is to ignore MSRC001_1030[IbsIcMiss]
+ * Erratum #1347 workaround is to use table provided in erratum
+ */
+ if (reg.phy_addr_valid)
+ l1tlb_pgsz_str = l1tlb_pgsz_strs_erratum1347[reg.l1tlb_pgsz];
+ } else {
+ if (reg.phy_addr_valid)
+ l1tlb_pgsz_str = l1tlb_pgsz_strs[reg.l1tlb_pgsz];
+ ic_miss_str = ic_miss_strs[reg.ic_miss];
+ }
+
+ printf("ibs_fetch_ctl:\t%016llx MaxCnt %7d Cnt %7d Lat %5d En %d Val %d Comp %d%s "
+ "PhyAddrValid %d%s L1TlbMiss %d L2TlbMiss %d RandEn %d%s\n",
+ reg.val, reg.fetch_maxcnt << 4, reg.fetch_cnt << 4, reg.fetch_lat,
+ reg.fetch_en, reg.fetch_val, reg.fetch_comp, ic_miss_str ? : "",
+ reg.phy_addr_valid, l1tlb_pgsz_str ? : "", reg.l1tlb_miss, reg.l2tlb_miss,
+ reg.rand_en, reg.fetch_comp ? (reg.fetch_l2_miss ? " L2Miss 1" : " L2Miss 0") : "");
+}
+
+static void pr_ic_ibs_extd_ctl(union ic_ibs_extd_ctl reg)
+{
+ printf("ic_ibs_ext_ctl:\t%016llx IbsItlbRefillLat %3d\n", reg.val, reg.itlb_refill_lat);
+}
+
+static void pr_ibs_op_ctl(union ibs_op_ctl reg)
+{
+ printf("ibs_op_ctl:\t%016llx MaxCnt %9d En %d Val %d CntCtl %d=%s CurCnt %9d\n",
+ reg.val, ((reg.opmaxcnt_ext << 16) | reg.opmaxcnt) << 4, reg.op_en, reg.op_val,
+ reg.cnt_ctl, reg.cnt_ctl ? "uOps" : "cycles", reg.opcurcnt);
+}
+
+static void pr_ibs_op_data(union ibs_op_data reg)
+{
+ printf("ibs_op_data:\t%016llx CompToRetCtr %5d TagToRetCtr %5d%s%s%s BrnRet %d "
+ " RipInvalid %d BrnFuse %d Microcode %d\n",
+ reg.val, reg.comp_to_ret_ctr, reg.tag_to_ret_ctr,
+ reg.op_brn_ret ? (reg.op_return ? " OpReturn 1" : " OpReturn 0") : "",
+ reg.op_brn_ret ? (reg.op_brn_taken ? " OpBrnTaken 1" : " OpBrnTaken 0") : "",
+ reg.op_brn_ret ? (reg.op_brn_misp ? " OpBrnMisp 1" : " OpBrnMisp 0") : "",
+ reg.op_brn_ret, reg.op_rip_invalid, reg.op_brn_fuse, reg.op_microcode);
+}
+
+static void pr_ibs_op_data2(union ibs_op_data2 reg)
+{
+ static const char * const data_src_str[] = {
+ "",
+ " DataSrc 1=(reserved)",
+ " DataSrc 2=Local node cache",
+ " DataSrc 3=DRAM",
+ " DataSrc 4=Remote node cache",
+ " DataSrc 5=(reserved)",
+ " DataSrc 6=(reserved)",
+ " DataSrc 7=Other"
+ };
+
+ printf("ibs_op_data2:\t%016llx %sRmtNode %d%s\n", reg.val,
+ reg.data_src == 2 ? (reg.cache_hit_st ? "CacheHitSt 1=O-State "
+ : "CacheHitSt 0=M-state ") : "",
+ reg.rmt_node, data_src_str[reg.data_src]);
+}
+
+static void pr_ibs_op_data3(union ibs_op_data3 reg)
+{
+ char l2_miss_str[sizeof(" L2Miss _")] = "";
+ char op_mem_width_str[sizeof(" OpMemWidth __ bytes")] = "";
+ char op_dc_miss_open_mem_reqs_str[sizeof(" OpDcMissOpenMemReqs __")] = "";
+
+ /*
+ * Erratum #1293
+ * Ignore L2Miss and OpDcMissOpenMemReqs (and opdata2) if DcMissNoMabAlloc or SwPf set
+ */
+ if (!(cpu_family == 0x19 && cpu_model < 0x10 && (reg.dc_miss_no_mab_alloc || reg.sw_pf))) {
+ snprintf(l2_miss_str, sizeof(" L2Miss _"),
+ " L2Miss %d", reg.l2_miss);
+ snprintf(op_dc_miss_open_mem_reqs_str, sizeof(" OpDcMissOpenMemReqs __"),
+ " OpDcMissOpenMemReqs %2d", reg.op_dc_miss_open_mem_reqs);
+ }
+
+ if (reg.op_mem_width)
+ snprintf(op_mem_width_str, sizeof(" OpMemWidth __ bytes"),
+ " OpMemWidth %2d bytes", 1 << (reg.op_mem_width - 1));
+
+ printf("ibs_op_data3:\t%016llx LdOp %d StOp %d DcL1TlbMiss %d DcL2TlbMiss %d "
+ "DcL1TlbHit2M %d DcL1TlbHit1G %d DcL2TlbHit2M %d DcMiss %d DcMisAcc %d "
+ "DcWcMemAcc %d DcUcMemAcc %d DcLockedOp %d DcMissNoMabAlloc %d DcLinAddrValid %d "
+ "DcPhyAddrValid %d DcL2TlbHit1G %d%s SwPf %d%s%s DcMissLat %5d TlbRefillLat %5d\n",
+ reg.val, reg.ld_op, reg.st_op, reg.dc_l1tlb_miss, reg.dc_l2tlb_miss,
+ reg.dc_l1tlb_hit_2m, reg.dc_l1tlb_hit_1g, reg.dc_l2tlb_hit_2m, reg.dc_miss,
+ reg.dc_mis_acc, reg.dc_wc_mem_acc, reg.dc_uc_mem_acc, reg.dc_locked_op,
+ reg.dc_miss_no_mab_alloc, reg.dc_lin_addr_valid, reg.dc_phy_addr_valid,
+ reg.dc_l2_tlb_hit_1g, l2_miss_str, reg.sw_pf, op_mem_width_str,
+ op_dc_miss_open_mem_reqs_str, reg.dc_miss_lat, reg.tlb_refill_lat);
+}
+
+/*
+ * IBS Op/Execution MSRs always saved, in order, are:
+ * IBS_OP_CTL, IBS_OP_RIP, IBS_OP_DATA, IBS_OP_DATA2,
+ * IBS_OP_DATA3, IBS_DC_LINADDR, IBS_DC_PHYSADDR, BP_IBSTGT_RIP
+ */
+static void amd_dump_ibs_op(struct perf_sample *sample)
+{
+ struct perf_ibs_data *data = sample->raw_data;
+ union ibs_op_ctl *op_ctl = (union ibs_op_ctl *)data->data;
+ __u64 *rip = (__u64 *)op_ctl + 1;
+ union ibs_op_data *op_data = (union ibs_op_data *)(rip + 1);
+ union ibs_op_data3 *op_data3 = (union ibs_op_data3 *)(rip + 3);
+
+ pr_ibs_op_ctl(*op_ctl);
+ if (!op_data->op_rip_invalid)
+ printf("IbsOpRip:\t%016llx\n", *rip);
+ pr_ibs_op_data(*op_data);
+ /*
+ * Erratum #1293: ignore op_data2 if DcMissNoMabAlloc or SwPf are set
+ */
+ if (!(cpu_family == 0x19 && cpu_model < 0x10 &&
+ (op_data3->dc_miss_no_mab_alloc || op_data3->sw_pf)))
+ pr_ibs_op_data2(*(union ibs_op_data2 *)(rip + 2));
+ pr_ibs_op_data3(*op_data3);
+ if (op_data3->dc_lin_addr_valid)
+ printf("IbsDCLinAd:\t%016llx\n", *(rip + 4));
+ if (op_data3->dc_phy_addr_valid)
+ printf("IbsDCPhysAd:\t%016llx\n", *(rip + 5));
+ if (op_data->op_brn_ret && *(rip + 6))
+ printf("IbsBrTarget:\t%016llx\n", *(rip + 6));
+}
+
+/*
+ * IBS Fetch MSRs always saved, in order, are:
+ * IBS_FETCH_CTL, IBS_FETCH_LINADDR, IBS_FETCH_PHYSADDR, IC_IBS_EXTD_CTL
+ */
+static void amd_dump_ibs_fetch(struct perf_sample *sample)
+{
+ struct perf_ibs_data *data = sample->raw_data;
+ union ibs_fetch_ctl *fetch_ctl = (union ibs_fetch_ctl *)data->data;
+ __u64 *addr = (__u64 *)fetch_ctl + 1;
+ union ic_ibs_extd_ctl *extd_ctl = (union ic_ibs_extd_ctl *)addr + 2;
+
+ pr_ibs_fetch_ctl(*fetch_ctl);
+ printf("IbsFetchLinAd:\t%016llx\n", *addr++);
+ if (fetch_ctl->phy_addr_valid)
+ printf("IbsFetchPhysAd:\t%016llx\n", *addr);
+ pr_ic_ibs_extd_ctl(*extd_ctl);
+}
+
+/*
+ * Test for enable and valid bits in captured control MSRs.
+ */
+static bool is_valid_ibs_fetch_sample(struct perf_sample *sample)
+{
+ struct perf_ibs_data *data = sample->raw_data;
+ union ibs_fetch_ctl *fetch_ctl = (union ibs_fetch_ctl *)data->data;
+
+ if (fetch_ctl->fetch_en && fetch_ctl->fetch_val)
+ return true;
+
+ return false;
+}
+
+static bool is_valid_ibs_op_sample(struct perf_sample *sample)
+{
+ struct perf_ibs_data *data = sample->raw_data;
+ union ibs_op_ctl *op_ctl = (union ibs_op_ctl *)data->data;
+
+ if (op_ctl->op_en && op_ctl->op_val)
+ return true;
+
+ return false;
+}
+
+/* AMD vendor specific raw sample function. Check for PERF_RECORD_SAMPLE events
+ * and if the event was triggered by IBS, display its raw data with decoded text.
+ * The function is only invoked when the dump flag -D is set.
+ */
+void evlist__amd_sample_raw(struct evlist *evlist, union perf_event *event,
+ struct perf_sample *sample)
+{
+ struct evsel *evsel;
+
+ if (event->header.type != PERF_RECORD_SAMPLE || !sample->raw_size)
+ return;
+
+ evsel = evlist__event2evsel(evlist, event);
+ if (!evsel)
+ return;
+
+ if (evsel->core.attr.type == ibs_fetch_type) {
+ if (!is_valid_ibs_fetch_sample(sample)) {
+ pr_debug("Invalid raw IBS Fetch MSR data encountered\n");
+ return;
+ }
+ amd_dump_ibs_fetch(sample);
+ } else if (evsel->core.attr.type == ibs_op_type) {
+ if (!is_valid_ibs_op_sample(sample)) {
+ pr_debug("Invalid raw IBS Op MSR data encountered\n");
+ return;
+ }
+ amd_dump_ibs_op(sample);
+ }
+}
+
+static void parse_cpuid(struct perf_env *env)
+{
+ const char *cpuid;
+ int ret;
+
+ cpuid = perf_env__cpuid(env);
+ /*
+ * cpuid = "AuthenticAMD,family,model,stepping"
+ */
+ ret = sscanf(cpuid, "%*[^,],%u,%u", &cpu_family, &cpu_model);
+ if (ret != 2)
+ pr_debug("problem parsing cpuid\n");
+}
+
+/*
+ * Find and assign the type number used for ibs_op or ibs_fetch samples.
+ * Device names can be large - we are only interested in the first 9 characters,
+ * to match "ibs_fetch".
+ */
+bool evlist__has_amd_ibs(struct evlist *evlist)
+{
+ struct perf_env *env = evlist->env;
+ int ret, nr_pmu_mappings = perf_env__nr_pmu_mappings(env);
+ const char *pmu_mapping = perf_env__pmu_mappings(env);
+ char name[sizeof("ibs_fetch")];
+ u32 type;
+
+ while (nr_pmu_mappings--) {
+ ret = sscanf(pmu_mapping, "%u:%9s", &type, name);
+ if (ret == 2) {
+ if (strstarts(name, "ibs_op"))
+ ibs_op_type = type;
+ else if (strstarts(name, "ibs_fetch"))
+ ibs_fetch_type = type;
+ }
+ pmu_mapping += strlen(pmu_mapping) + 1 /* '\0' */;
+ }
+
+ if (ibs_fetch_type || ibs_op_type) {
+ if (!cpu_family)
+ parse_cpuid(env);
+ return true;
+ }
+
+ return false;
+}
diff --git a/tools/perf/util/sample-raw.c b/tools/perf/util/sample-raw.c
index cde5cd3ce49b..f3f6bd9d290e 100644
--- a/tools/perf/util/sample-raw.c
+++ b/tools/perf/util/sample-raw.c
@@ -1,8 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <string.h>
+#include <linux/string.h>
#include "evlist.h"
#include "env.h"
+#include "header.h"
#include "sample-raw.h"
/*
@@ -12,7 +14,13 @@
void evlist__init_trace_event_sample_raw(struct evlist *evlist)
{
const char *arch_pf = perf_env__arch(evlist->env);
+ const char *cpuid = perf_env__cpuid(evlist->env);
if (arch_pf && !strcmp("s390", arch_pf))
evlist->trace_event_sample_raw = evlist__s390_sample_raw;
+ else if (arch_pf && !strcmp("x86", arch_pf) &&
+ cpuid && strstarts(cpuid, "AuthenticAMD") &&
+ evlist__has_amd_ibs(evlist)) {
+ evlist->trace_event_sample_raw = evlist__amd_sample_raw;
+ }
}
diff --git a/tools/perf/util/sample-raw.h b/tools/perf/util/sample-raw.h
index 4be84a5510cf..ea01c5811503 100644
--- a/tools/perf/util/sample-raw.h
+++ b/tools/perf/util/sample-raw.h
@@ -6,6 +6,10 @@ struct evlist;
union perf_event;
struct perf_sample;
-void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, struct perf_sample *sample);
+void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event,
+ struct perf_sample *sample);
+bool evlist__has_amd_ibs(struct evlist *evlist);
+void evlist__amd_sample_raw(struct evlist *evlist, union perf_event *event,
+ struct perf_sample *sample);
void evlist__init_trace_event_sample_raw(struct evlist *evlist);
#endif /* __PERF_EVLIST_H */
--
2.31.1