LinuxLists.cc - [PATCH v4 0/4] perf tools: Add printing perf_event_attr `config` and `id` symbol in perf_event_attr_

2023-05-16 07:10:50

Subject: [PATCH v4 0/4] perf tools: Add printing perf_event_attr `config` and `id` symbol in perf_event_attr__fprintf()

Add printing perf_event_attr `config` and `id` 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
------------------------------------------------------------
<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>

Yang Jihong (4):
perf trace-event-info: Add tracepoint_id_to_name() helper
perf tools: Extend PRINT_ATTRf to support printing of members with a
value of 0
perf tools: Add printing perf_event_attr type symbol in
perf_event_attr__fprintf()
perf tools: Add printing perf_event_attr config symbol in
perf_event_attr__fprintf()

tools/perf/util/perf_event_attr_fprintf.c | 186 ++++++++++++++++++++--
tools/perf/util/trace-event-info.c | 11 ++
tools/perf/util/trace-event.h | 6 +
3 files changed, 194 insertions(+), 9 deletions(-)

--

Changes since v3:
- Change print_id() helper to a macro function to support printing of both hex and unsigned formats.

Changes since v2:
- Adjusting the order of local declarations in tracepoint_id_to_name()
- Remove unnecessary parentheses and "!= NULL" in tracepoint_id_to_name()
- Remove unnecessary comment of synchronizing with perf_event.h
- Add print_id helper()
- Remove "#ifdef HAVE_LIBTRACEEVENT" put around "#include "trace-event.h"
- Remove comment of "// for free" for "#include <stdlib.h>"

Changes since v1:
- Modify initialization of path in tracepoint_id_to_path().
- Replace snprintf&strdup with asprintf.
- Use switch/case to get stringified name for type and id.

2.30.GIT

2023-05-16 07:12:51

by Yang Jihong

[permalink] [raw]

Subject: [PATCH v4 2/4] perf tools: Extend PRINT_ATTRf to support printing of members with a value of 0

When printing attr, members whose value is 0 will not be printed, we want
to print the case where attr->type is 0(PERF_TYPE_HARDWARE), add `_a`
param to PRINT_ATTRf macro to always print member when it is true
No functional change.

Signed-off-by: Yang Jihong <[email protected]>
---
tools/perf/util/perf_event_attr_fprintf.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
index 7e5e7b30510d..433029c6afc5 100644
--- a/tools/perf/util/perf_event_attr_fprintf.c
+++ b/tools/perf/util/perf_event_attr_fprintf.c
@@ -80,15 +80,15 @@ static void __p_read_format(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 PRINT_ATTRn(_n, _f, _p) \
+#define PRINT_ATTRn(_n, _f, _p, _a) \
do { \
- if (attr->_f) { \
+ if (_a || attr->_f) { \
_p(attr->_f); \
ret += attr__fprintf(fp, _n, buf, priv);\
} \
} while (0)

-#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
+#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p, false)

int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
attr__fprintf_f attr__fprintf, void *priv)
@@ -99,7 +99,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
PRINT_ATTRf(type, p_unsigned);
PRINT_ATTRf(size, p_unsigned);
PRINT_ATTRf(config, p_hex);
- PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
+ 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);

@@ -141,10 +141,10 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
PRINT_ATTRf(remove_on_exec, p_unsigned);
PRINT_ATTRf(sigtrap, p_unsigned);

- PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
+ PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned, false);
PRINT_ATTRf(bp_type, p_unsigned);
- PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
- PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
+ PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex, false);
+ PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex, false);
PRINT_ATTRf(branch_sample_type, p_branch_sample_type);
PRINT_ATTRf(sample_regs_user, p_hex);
PRINT_ATTRf(sample_stack_user, p_unsigned);
--
2.30.GIT

2023-05-16 10:07:57

by Adrian Hunter

[permalink] [raw]

Subject: Re: [PATCH v4 0/4] perf tools: Add printing perf_event_attr `config` and `id` symbol in perf_event_attr__fprintf()

On 16/05/23 09:55, Yang Jihong wrote:
> Add printing perf_event_attr `config` and `id` 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
> ------------------------------------------------------------
> <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>
>
> Yang Jihong (4):
> perf trace-event-info: Add tracepoint_id_to_name() helper
> perf tools: Extend PRINT_ATTRf to support printing of members with a
> value of 0
> perf tools: Add printing perf_event_attr type symbol in
> perf_event_attr__fprintf()
> perf tools: Add printing perf_event_attr config symbol in
> perf_event_attr__fprintf()
>
> tools/perf/util/perf_event_attr_fprintf.c | 186 ++++++++++++++++++++--
> tools/perf/util/trace-event-info.c | 11 ++
> tools/perf/util/trace-event.h | 6 +
> 3 files changed, 194 insertions(+), 9 deletions(-)
>

Acked-by: Adrian Hunter <[email protected]>

2023-05-19 01:27:34

by Yang Jihong

[permalink] [raw]

Subject: Re: [PATCH v4 0/4] perf tools: Add printing perf_event_attr `config` and `id` symbol in perf_event_attr__fprintf()

Hello,

On 2023/5/16 17:49, Adrian Hunter wrote:
> On 16/05/23 09:55, Yang Jihong wrote:
>> Add printing perf_event_attr `config` and `id` 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
>> ------------------------------------------------------------
>> <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>
>>
>> Yang Jihong (4):
>> perf trace-event-info: Add tracepoint_id_to_name() helper
>> perf tools: Extend PRINT_ATTRf to support printing of members with a
>> value of 0
>> perf tools: Add printing perf_event_attr type symbol in
>> perf_event_attr__fprintf()
>> perf tools: Add printing perf_event_attr config symbol in
>> perf_event_attr__fprintf()
>>
>> tools/perf/util/perf_event_attr_fprintf.c | 186 ++++++++++++++++++++--
>> tools/perf/util/trace-event-info.c | 11 ++
>> tools/perf/util/trace-event.h | 6 +
>> 3 files changed, 194 insertions(+), 9 deletions(-)
>>
>
> Acked-by: Adrian Hunter <[email protected]>
>
Thanks for review!

Thanks,
Yang
> .
>