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perf script: Enhance sample flags for trace begin / end 

Allow for different combinations of sample flags with "trace begin" or
"trace end".

Previously, the Intel PT decoder would indicate begin / end by a branch
from / to zero. That hides useful information, in particular when a
trace ends with a call. Before remedying that, prepare 'perf script' to
display sample flags with more combinations that include trace begin /
end. In those cases display 'tr start' and 'tr end' separately.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20180920130048.31432-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2018-09-20 16:00:43 +03:00 committed by Arnaldo Carvalho de Melo
parent 035c450ffa
commit 62cb1b8868
1 changed files with 27 additions and 9 deletions
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36
tools/perf/builtin-script.c
View File

@ -1262,6 +1262,18 @@ static struct {
{0, NULL}
};
static const char *sample_flags_to_name(u32 flags)
{
int i;
for (i = 0; sample_flags[i].name ; i++) {
if (sample_flags[i].flags == flags)
return sample_flags[i].name;
}
return NULL;
}
static int perf_sample__fprintf_flags(u32 flags, FILE *fp)
{
const char *chars = PERF_IP_FLAG_CHARS;
@ -1271,11 +1283,20 @@ static int perf_sample__fprintf_flags(u32 flags, FILE *fp)
char str[33];
int i, pos = 0;
for (i = 0; sample_flags[i].name ; i++) {
if (sample_flags[i].flags == (flags & ~PERF_IP_FLAG_IN_TX)) {
name = sample_flags[i].name;
break;
}
name = sample_flags_to_name(flags & ~PERF_IP_FLAG_IN_TX);
if (name)
return fprintf(fp, " %-15s%4s ", name, in_tx ? "(x)" : "");
if (flags & PERF_IP_FLAG_TRACE_BEGIN) {
name = sample_flags_to_name(flags & ~(PERF_IP_FLAG_IN_TX | PERF_IP_FLAG_TRACE_BEGIN));
if (name)
return fprintf(fp, " tr strt %-7s%4s ", name, in_tx ? "(x)" : "");
}
if (flags & PERF_IP_FLAG_TRACE_END) {
name = sample_flags_to_name(flags & ~(PERF_IP_FLAG_IN_TX | PERF_IP_FLAG_TRACE_END));
if (name)
return fprintf(fp, " tr end %-7s%4s ", name, in_tx ? "(x)" : "");
}
for (i = 0; i < n; i++, flags >>= 1) {
@ -1288,10 +1309,7 @@ static int perf_sample__fprintf_flags(u32 flags, FILE *fp)
}
str[pos] = 0;
if (name)
return fprintf(fp, " %-7s%4s ", name, in_tx ? "(x)" : "");
return fprintf(fp, " %-11s ", str);
return fprintf(fp, " %-19s ", str);
}
struct printer_data {