Messages in this thread Patch in this message | | | From | Yang Jihong <> | Subject | [PATCH 3/4] perf tools: Add printing perf_event_attr->type symbol in perf_event_attr__fprintf() | Date | Wed, 19 Apr 2023 12:29:11 +0000 |
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When printing perf_event_attr, always display attr->type 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 { 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 { 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 { 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 { 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@huawei.com> --- tools/perf/util/perf_event_attr_fprintf.c | 24 ++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c index 433029c6afc5..d9d70126d505 100644 --- a/tools/perf/util/perf_event_attr_fprintf.c +++ b/tools/perf/util/perf_event_attr_fprintf.c @@ -71,6 +71,27 @@ static void __p_read_format(char *buf, size_t size, u64 value) __p_bits(buf, size, value, bits); } +static void __p_type_id(char *buf, size_t size, u64 value) +{ + /* sync with enum perf_type_id in perf_event.h */ + switch (value) { +#define PRINT_ENUM_PERF_TYPE_ID_CASE(x) \ + case x: \ + snprintf(buf, size, "%"PRIu64" (%s)", value, #x); \ + return; + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_HARDWARE) + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_SOFTWARE) + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_TRACEPOINT) + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_HW_CACHE) + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_RAW) + PRINT_ENUM_PERF_TYPE_ID_CASE(PERF_TYPE_BREAKPOINT) +#undef PRINT_ENUM_PERF_TYPE_ID_CASE + default: + snprintf(buf, size, "%"PRIu64, value); + return; + } +} + #define BUF_SIZE 1024 #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val)) @@ -79,6 +100,7 @@ static void __p_read_format(char *buf, size_t size, u64 value) #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val) #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 PRINT_ATTRn(_n, _f, _p, _a) \ do { \ @@ -96,7 +118,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr, char buf[BUF_SIZE]; int ret = 0; - PRINT_ATTRf(type, p_unsigned); + PRINT_ATTRn("type", type, p_type_id, true); PRINT_ATTRf(size, p_unsigned); PRINT_ATTRf(config, p_hex); PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned, false); -- 2.30.GIT
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