See http://www.infradead.org/rpr.html
From: Wang Nan <[email protected]> Timestamp generation becomes a public available helper. Which will be used by 'perf record', help it output to split output file based on time. For example: perf.data.2015122620363710 perf.data.2015122620364092 perf.data.2015122620365423 ... Signed-off-by: Wang Nan <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Brendan Gregg <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: He Kuang <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Li Zefan <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Will Deacon <[email protected]> Cc: Zefan Li <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: He Kuang <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/builtin-buildid-cache.c | 14 +------------- tools/perf/util/util.c | 17 +++++++++++++++++ tools/perf/util/util.h | 1 + 3 files changed, 19 insertions(+), 13 deletions(-) diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c index d93bff7fc0e4..632efc6b79a0 100644 --- a/tools/perf/builtin-buildid-cache.c +++ b/tools/perf/builtin-buildid-cache.c @@ -38,19 +38,7 @@ static int build_id_cache__kcore_buildid(const char *proc_dir, char *sbuildid) static int build_id_cache__kcore_dir(char *dir, size_t sz) { - struct timeval tv; - struct tm tm; - char dt[32]; - - if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm)) - return -1; - - if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm)) - return -1; - - scnprintf(dir, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000); - - return 0; + return fetch_current_timestamp(dir, sz); } static bool same_kallsyms_reloc(const char *from_dir, char *to_dir) diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 7a2da7ef556e..b9e2843cfbe7 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -701,3 +701,20 @@ bool is_regular_file(const char *file) return S_ISREG(st.st_mode); } + +int fetch_current_timestamp(char *buf, size_t sz) +{ + struct timeval tv; + struct tm tm; + char dt[32]; + + if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm)) + return -1; + + if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm)) + return -1; + + scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000); + + return 0; +} diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 61650f05e5c1..a8615816a00d 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -344,5 +344,6 @@ int fetch_kernel_version(unsigned int *puint, const char *perf_tip(const char *dirpath); bool is_regular_file(const char *file); +int fetch_current_timestamp(char *buf, size_t sz); #endif /* GIT_COMPAT_UTIL_H */ -- 2.5.0
