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perf tools: Change perf_mem__tlb_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/1456303616-26926-10-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 09:46:50 +01:00 committed by Arnaldo Carvalho de Melo
parent 69a7727592
commit b1a5fbea3d
2 changed files with 8 additions and 7 deletions
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13
tools/perf/util/mem-events.c
View file

@ -95,7 +95,7 @@ static const char * const tlb_access[] = {
"Fault",
};
void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
size_t l = 0, i;
u64 m = PERF_MEM_TLB_NA;
@ -120,15 +120,16 @@ void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
strcat(out, " or ");
l += 4;
}
strncat(out, tlb_access[i], sz - l);
l += strlen(tlb_access[i]);
l += scnprintf(out + l, sz - l, tlb_access[i]);
}
if (*out == '\0')
strcpy(out, "N/A");
l += scnprintf(out, sz - l, "N/A");
if (hit)
strncat(out, " hit", sz - l);
l += scnprintf(out + l, sz - l, " hit");
if (miss)
strncat(out, " miss", sz - l);
l += scnprintf(out + l, sz - l, " miss");
return l;
}
static const char * const mem_lvl[] = {

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

@ -25,7 +25,7 @@ int perf_mem_events__init(void);
char *perf_mem_events__name(int i);
struct mem_info;
void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
void 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);
void perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);