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perf tools: Change perf_mem__snp_scnprintf to return nb of displayed bytes

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Moving strncat/strcpy calls into scnprintf to easily track number of
displayed bytes. It will be used in following patch.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1456303616-26926-12-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2016-02-24 09:46:52 +01:00 committed by Arnaldo Carvalho de Melo
parent 969075630e
commit 149d750767
2 changed files with 6 additions and 5 deletions
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9
tools/perf/util/mem-events.c
View File

@ -194,7 +194,7 @@ static const char * const snoop_access[] = {
"HitM",
};
void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t i, l = 0;
u64 m = PERF_MEM_SNOOP_NA;
@ -212,12 +212,13 @@ void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
strcat(out, " or ");
l += 4;
}
strncat(out, snoop_access[i], sz - l);
l += strlen(snoop_access[i]);
l += scnprintf(out + l, sz - l, snoop_access[i]);
}
if (*out == '\0')
strcpy(out, "N/A");
l += scnprintf(out, sz - l, "N/A");
return l;
}
void perf_mem__lck_scnprintf(char *out, size_t sz __maybe_unused,

2
tools/perf/util/mem-events.h
View File

@ -27,7 +27,7 @@ char *perf_mem_events__name(int i);
struct mem_info;
int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
void perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
void perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
#endif /* __PERF_MEM_EVENTS_H */