Messages in this thread Patch in this message | | | Date | Wed, 10 May 2023 11:32:02 +0300 | Subject | Re: [PATCH 3/4] perf tools: Add printing perf_event_attr->type symbol in perf_event_attr__fprintf() | From | Adrian Hunter <> |
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On 19/04/23 15:29, Yang Jihong wrote: > 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
These are ABI constants so maybe simpler:
const char *fixed_types[] = {"HARDWARE", "SOFTWARE", "TRACEPOINT", "HW_CACHE", "RAW", "BREAKPOINT"};
if (value < ARRAY_SIZE(fixed_types)) { snprintf(buf, size, "%"PRIu64" (PERF_TYPE_%s)", value, fixed_types[value]); } else { snprintf(buf, size, "%"PRIu64, value); }
> + 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);
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