[PATCH 4/4] perf tools: Add printing perf_event_attr->config symbol in perf_event_attr__fprintf()
From: Yang Jihong
Date: Wed Apr 19 2023 - 08:31:32 EST
When printing perf_event_attr, always display attr->config and its symbol
to improve the readability of debugging information.
Before:
# perf --debug verbose=2 record -e cycles,cpu-clock,sched:sched_switch,branch-load-misses,r101 -C 0 true
<SNIP>
------------------------------------------------------------
perf_event_attr:
size 136
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 6
------------------------------------------------------------
perf_event_attr:
type 1
size 136
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 7
------------------------------------------------------------
perf_event_attr:
type 2
size 136
config 0x131
{ sample_period, sample_freq } 1
sample_type IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER
read_format ID
disabled 1
inherit 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 8
------------------------------------------------------------
perf_event_attr:
type 3
size 136
config 0x10005
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 10
------------------------------------------------------------
perf_event_attr:
type 4
size 136
config 0x101
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 11
<SNIP>
After:
# perf --debug verbose=2 record -e cycles,cpu-clock,sched:sched_switch,branch-load-misses,r101 -C 0 true
<SNIP>
------------------------------------------------------------
perf_event_attr:
type 0 (PERF_TYPE_HARDWARE)
size 136
config 0 (PERF_COUNT_HW_CPU_CYCLES)
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 6
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 136
config 0 (PERF_COUNT_SW_CPU_CLOCK)
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 7
------------------------------------------------------------
perf_event_attr:
type 2 (PERF_TYPE_TRACEPOINT)
size 136
config 0x131 (sched:sched_switch)
{ sample_period, sample_freq } 1
sample_type IP|TID|TIME|CPU|PERIOD|RAW|IDENTIFIER
read_format ID
disabled 1
inherit 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 8
------------------------------------------------------------
perf_event_attr:
type 3 (PERF_TYPE_HW_CACHE)
size 136
config 0x10005 (PERF_COUNT_HW_CACHE_RESULT_MISS | PERF_COUNT_HW_CACHE_OP_READ | PERF_COUNT_HW_CACHE_BPU)
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 10
------------------------------------------------------------
perf_event_attr:
type 4 (PERF_TYPE_RAW)
size 136
config 0x101
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
disabled 1
inherit 1
freq 1
sample_id_all 1
exclude_guest 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 11
<SNIP>
Signed-off-by: Yang Jihong <yangjihong1@xxxxxxxxxx>
---
tools/perf/util/perf_event_attr_fprintf.c | 131 +++++++++++++++++++++-
1 file changed, 130 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
index d9d70126d505..e2ce4a737ef7 100644
--- a/tools/perf/util/perf_event_attr_fprintf.c
+++ b/tools/perf/util/perf_event_attr_fprintf.c
@@ -7,6 +7,11 @@
#include <linux/perf_event.h>
#include "util/evsel_fprintf.h"
+#ifdef HAVE_LIBTRACEEVENT
+#include <stdlib.h>
+#include "trace-event.h"
+#endif
+
struct bit_names {
int bit;
const char *name;
@@ -92,6 +97,129 @@ static void __p_type_id(char *buf, size_t size, u64 value)
}
}
+static void __p_config_hw_cache_id(char *buf, size_t size, u64 value)
+{
+ const char *hw_cache_str, *hw_cache_op_str, *hw_cache_op_result_str;
+
+#define ENUM_PERF_HW_CACHE_ID_CASE(x, s) case x: s = (#x); break;
+#define ENUM_PERF_HW_CACHE_ID_CASE_DEFAULT(s) default: s = NULL; break;
+
+ /* sync with enum perf_hw_cache_id in perf_event.h */
+ switch (value & 0xff) {
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_L1D, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_L1I, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_LL, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_DTLB, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_ITLB, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_BPU, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_NODE, hw_cache_str)
+ ENUM_PERF_HW_CACHE_ID_CASE_DEFAULT(hw_cache_str)
+ }
+
+ /* sync with enum perf_hw_cache_op_id in perf_event.h */
+ switch ((value & 0xff00) >> 8) {
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_OP_READ, hw_cache_op_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_OP_WRITE, hw_cache_op_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_OP_PREFETCH, hw_cache_op_str)
+ ENUM_PERF_HW_CACHE_ID_CASE_DEFAULT(hw_cache_op_str)
+ }
+
+ /* sync with enum perf_hw_cache_op_result_id in perf_event.h */
+ switch ((value & 0xff0000) >> 16) {
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_RESULT_ACCESS, hw_cache_op_result_str)
+ ENUM_PERF_HW_CACHE_ID_CASE(PERF_COUNT_HW_CACHE_RESULT_MISS, hw_cache_op_result_str)
+ ENUM_PERF_HW_CACHE_ID_CASE_DEFAULT(hw_cache_op_result_str)
+ }
+
+#undef ENUM_PERF_HW_CACHE_ID_CASE
+#undef ENUM_PERF_HW_CACHE_ID_CASE_DEFULT
+
+ if (hw_cache_str == NULL || hw_cache_op_str == NULL ||
+ hw_cache_op_result_str == NULL) {
+ snprintf(buf, size, "%#"PRIx64, value);
+ } else {
+ snprintf(buf, size, "%#"PRIx64" (%s | %s | %s)", value,
+ hw_cache_op_result_str, hw_cache_op_str, hw_cache_str);
+ }
+}
+
+#ifdef HAVE_LIBTRACEEVENT
+static void __p_config_tracepoint_id(char *buf, size_t size, u64 value)
+{
+ char *name = tracepoint_id_to_name(value);
+
+ if (name != NULL) {
+ snprintf(buf, size, "%#"PRIx64" (%s)", value, name);
+ free(name);
+ } else {
+ snprintf(buf, size, "%#"PRIx64, value);
+ }
+}
+#endif
+
+static void __p_config_id(char *buf, size_t size, u32 type, u64 value)
+{
+#define PRINT_ENUM_PERF_CONFIG_ID_CASE(x) \
+ case x: \
+ snprintf(buf, size, "%#"PRIx64" (%s)", value, #x); \
+ return;
+
+#define PRINT_ENUM_PERF_CONFIG_ID_DEFAULT_CASE \
+ default: \
+ snprintf(buf, size, "%#"PRIx64, value); \
+ return;
+
+ switch (type) {
+ case PERF_TYPE_HARDWARE:
+ /* sync with enum perf_hw_cache_id in perf_event.h */
+ switch (value & PERF_HW_EVENT_MASK) {
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_CPU_CYCLES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_INSTRUCTIONS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_CACHE_REFERENCES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_CACHE_MISSES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_BRANCH_INSTRUCTIONS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_BRANCH_MISSES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_BUS_CYCLES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_STALLED_CYCLES_FRONTEND)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_STALLED_CYCLES_BACKEND)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_HW_REF_CPU_CYCLES)
+ PRINT_ENUM_PERF_CONFIG_ID_DEFAULT_CASE
+ }
+
+ case PERF_TYPE_SOFTWARE:
+ /* sync with enum perf_sw_ids in perf_event.h */
+ switch (value) {
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_CPU_CLOCK)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_TASK_CLOCK)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_PAGE_FAULTS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_CONTEXT_SWITCHES)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_CPU_MIGRATIONS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_PAGE_FAULTS_MIN)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_PAGE_FAULTS_MAJ)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_ALIGNMENT_FAULTS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_EMULATION_FAULTS)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_DUMMY)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_BPF_OUTPUT)
+ PRINT_ENUM_PERF_CONFIG_ID_CASE(PERF_COUNT_SW_CGROUP_SWITCHES)
+ PRINT_ENUM_PERF_CONFIG_ID_DEFAULT_CASE
+ }
+#undef PRINT_ENUM_PERF_CONFIG_ID_CASE
+
+ case PERF_TYPE_HW_CACHE:
+ return __p_config_hw_cache_id(buf, size, value);
+
+ case PERF_TYPE_TRACEPOINT:
+#ifdef HAVE_LIBTRACEEVENT
+ return __p_config_tracepoint_id(buf, size, value);
+#endif
+ case PERF_TYPE_RAW:
+ case PERF_TYPE_BREAKPOINT:
+ PRINT_ENUM_PERF_CONFIG_ID_DEFAULT_CASE
+ }
+
+#undef PRINT_ENUM_PERF_CONFIG_ID_DEFAULT_CASE
+}
+
#define BUF_SIZE 1024
#define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
@@ -101,6 +229,7 @@ static void __p_type_id(char *buf, size_t size, u64 value)
#define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val)
#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
#define p_type_id(val) __p_type_id(buf, BUF_SIZE, val)
+#define p_config_id(val) __p_config_id(buf, BUF_SIZE, attr->type, val)
#define PRINT_ATTRn(_n, _f, _p, _a) \
do { \
@@ -120,7 +249,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
PRINT_ATTRn("type", type, p_type_id, true);
PRINT_ATTRf(size, p_unsigned);
- PRINT_ATTRf(config, p_hex);
+ PRINT_ATTRn("config", config, p_config_id, true);
PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned, false);
PRINT_ATTRf(sample_type, p_sample_type);
PRINT_ATTRf(read_format, p_read_format);
--
2.30.GIT