[PATCH v4 4/4] perf tools: Add printing perf_event_attr config symbol in perf_event_attr__fprintf()
From: Yang Jihong
Date: Tue May 16 2023 - 02:57:49 EST
When printing perf_event_attr, always display perf_event_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,mem:0x0 -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 = 5
------------------------------------------------------------
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 = 6
------------------------------------------------------------
perf_event_attr:
type 2
size 136
config 0x143
{ 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 = 7
------------------------------------------------------------
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 = 9
------------------------------------------------------------
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 = 10
------------------------------------------------------------
perf_event_attr:
type 5
size 136
{ sample_period, sample_freq } 1
sample_type IP|TID|TIME|CPU|IDENTIFIER
read_format ID
disabled 1
inherit 1
sample_id_all 1
exclude_guest 1
bp_type 3
{ bp_len, config2 } 0x4
------------------------------------------------------------
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,mem:0x0 -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 = 5
------------------------------------------------------------
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 = 6
------------------------------------------------------------
perf_event_attr:
type 2 (PERF_TYPE_TRACEPOINT)
size 136
config 0x143 (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 = 7
------------------------------------------------------------
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 = 9
------------------------------------------------------------
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 = 10
------------------------------------------------------------
perf_event_attr:
type 5 (PERF_TYPE_BREAKPOINT)
size 136
config 0
{ sample_period, sample_freq } 1
sample_type IP|TID|TIME|CPU|IDENTIFIER
read_format ID
disabled 1
inherit 1
sample_id_all 1
exclude_guest 1
bp_type 3
{ bp_len, config2 } 0x4
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 11
------------------------------------------------------------
perf_event_attr:
type 1 (PERF_TYPE_SOFTWARE)
size 136
config 0x9 (PERF_COUNT_SW_DUMMY)
{ sample_period, sample_freq } 4000
sample_type IP|TID|TIME|CPU|PERIOD|IDENTIFIER
read_format ID
inherit 1
mmap 1
comm 1
freq 1
task 1
sample_id_all 1
mmap2 1
comm_exec 1
ksymbol 1
bpf_event 1
------------------------------------------------------------
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 12
<SNIP>
Signed-off-by: Yang Jihong <yangjihong1@xxxxxxxxxx>
---
tools/perf/util/perf_event_attr_fprintf.c | 138 +++++++++++++++++++++-
1 file changed, 137 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
index b16521afc31d..2247991451f3 100644
--- a/tools/perf/util/perf_event_attr_fprintf.c
+++ b/tools/perf/util/perf_event_attr_fprintf.c
@@ -1,11 +1,13 @@
// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <stdio.h>
+#include <stdlib.h>
#include <stdbool.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/perf_event.h>
#include "util/evsel_fprintf.h"
+#include "trace-event.h"
struct bit_names {
int bit;
@@ -85,6 +87,80 @@ static const char *stringify_perf_type_id(u64 value)
return NULL;
}
}
+
+static const char *stringify_perf_hw_id(u64 value)
+{
+ switch (value) {
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CPU_CYCLES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_INSTRUCTIONS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_REFERENCES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_MISSES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BRANCH_INSTRUCTIONS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BRANCH_MISSES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_BUS_CYCLES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_STALLED_CYCLES_FRONTEND)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_STALLED_CYCLES_BACKEND)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_REF_CPU_CYCLES)
+ default:
+ return NULL;
+ }
+}
+
+static const char *stringify_perf_hw_cache_id(u64 value)
+{
+ switch (value) {
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_L1D)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_L1I)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_LL)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_DTLB)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_ITLB)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_BPU)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_NODE)
+ default:
+ return NULL;
+ }
+}
+
+static const char *stringify_perf_hw_cache_op_id(u64 value)
+{
+ switch (value) {
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_READ)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_WRITE)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_OP_PREFETCH)
+ default:
+ return NULL;
+ }
+}
+
+static const char *stringify_perf_hw_cache_op_result_id(u64 value)
+{
+ switch (value) {
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_RESULT_ACCESS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_HW_CACHE_RESULT_MISS)
+ default:
+ return NULL;
+ }
+}
+
+static const char *stringify_perf_sw_id(u64 value)
+{
+ switch (value) {
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CPU_CLOCK)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_TASK_CLOCK)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CONTEXT_SWITCHES)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CPU_MIGRATIONS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS_MIN)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_PAGE_FAULTS_MAJ)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_ALIGNMENT_FAULTS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_EMULATION_FAULTS)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_DUMMY)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_BPF_OUTPUT)
+ ENUM_ID_TO_STR_CASE(PERF_COUNT_SW_CGROUP_SWITCHES)
+ default:
+ return NULL;
+ }
+}
#undef ENUM_ID_TO_STR_CASE
#define PRINT_ID(_s, _f) \
@@ -96,12 +172,71 @@ do { \
snprintf(buf, size, _f" (%s)", value, __s); \
} while (0)
#define print_id_unsigned(_s) PRINT_ID(_s, "%"PRIu64)
+#define print_id_hex(_s) PRINT_ID(_s, "%#"PRIx64)
static void __p_type_id(char *buf, size_t size, u64 value)
{
print_id_unsigned(stringify_perf_type_id(value));
}
+static void __p_config_hw_id(char *buf, size_t size, u64 value)
+{
+ print_id_hex(stringify_perf_hw_id(value));
+}
+
+static void __p_config_sw_id(char *buf, size_t size, u64 value)
+{
+ print_id_hex(stringify_perf_sw_id(value));
+}
+
+static void __p_config_hw_cache_id(char *buf, size_t size, u64 value)
+{
+ const char *hw_cache_str = stringify_perf_hw_cache_id(value & 0xff);
+ const char *hw_cache_op_str =
+ stringify_perf_hw_cache_op_id((value & 0xff00) >> 8);
+ const char *hw_cache_op_result_str =
+ stringify_perf_hw_cache_op_result_id((value & 0xff0000) >> 16);
+
+ 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 *str = tracepoint_id_to_name(value);
+
+ print_id_hex(str);
+ free(str);
+}
+#endif
+
+static void __p_config_id(char *buf, size_t size, u32 type, u64 value)
+{
+ switch (type) {
+ case PERF_TYPE_HARDWARE:
+ return __p_config_hw_id(buf, size, value);
+ case PERF_TYPE_SOFTWARE:
+ return __p_config_sw_id(buf, size, value);
+ 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:
+ default:
+ snprintf(buf, size, "%#"PRIx64, value);
+ return;
+ }
+}
+
#define BUF_SIZE 1024
#define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
@@ -111,6 +246,7 @@ 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 { \
@@ -130,7 +266,7 @@ 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