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perf debug: Add debug_set_display_time function 

Allow to display time in perf debug output via new
debug_set_display_time function.

It will be used in perf daemon command to get verbose output into log
file.

The debug time format is:

  [2020-12-03 18:25:31.822152] affinity: SYS
  [2020-12-03 18:25:31.822164] mmap flush: 1
  [2020-12-03 18:25:31.822175] comp level: 0
  [2020-12-03 18:25:32.002047] mmap size 528384B

Committer notes:

Cast tod.tv_usec to long to avoid this problem:

    78    12.70 ubuntu:18.04-x-sparc64        : FAIL sparc64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0

  util/debug.c: In function 'fprintf_time':
  util/debug.c:63:32: error: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type '__suseconds_t {aka int}' [-Werror=format=]
    return fprintf(file, "[%s.%06lu] ", date, tod.tv_usec);
                              ~~~~^           ~~~~~~~~~~~
                              %06u

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Budankov <abudankov@huawei.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20210102220441.794923-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2021-01-02 23:04:22 +01:00 committed by Arnaldo Carvalho de Melo
parent a523026cac
commit bcbd79d1cf
2 changed files with 32 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
tools/perf/util/debug.c
View File

@ -10,6 +10,7 @@
#include <api/debug.h>
#include <linux/kernel.h>
#include <linux/time64.h>
#include <sys/time.h>
#ifdef HAVE_BACKTRACE_SUPPORT
#include <execinfo.h>
#endif
@ -31,21 +32,48 @@ int debug_ordered_events;
static int redirect_to_stderr;
int debug_data_convert;
static FILE *debug_file;
bool debug_display_time;
void debug_set_file(FILE *file)
{
debug_file = file;
}
void debug_set_display_time(bool set)
{
debug_display_time = set;
}
static int fprintf_time(FILE *file)
{
struct timeval tod;
struct tm ltime;
char date[64];
if (!debug_display_time)
return 0;
if (gettimeofday(&tod, NULL) != 0)
return 0;
if (localtime_r(&tod.tv_sec, &ltime) == NULL)
return 0;
strftime(date, sizeof(date), "%F %H:%M:%S", &ltime);
return fprintf(file, "[%s.%06lu] ", date, (long)tod.tv_usec);
}
int veprintf(int level, int var, const char *fmt, va_list args)
{
int ret = 0;
if (var >= level) {
if (use_browser >= 1 && !redirect_to_stderr)
if (use_browser >= 1 && !redirect_to_stderr) {
ui_helpline__vshow(fmt, args);
else
ret = vfprintf(debug_file, fmt, args);
} else {
ret = fprintf_time(debug_file);
ret += vfprintf(debug_file, fmt, args);
}
}
return ret;

1
tools/perf/util/debug.h
View File

@ -64,6 +64,7 @@ int veprintf(int level, int var, const char *fmt, va_list args);
int perf_debug_option(const char *str);
void debug_set_file(FILE *file);
void debug_set_display_time(bool set);
void perf_debug_setup(void);
int perf_quiet_option(void);