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author | Yunlong Song <yunlong.song@huawei.com> | 2015-04-02 21:47:14 +0800 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-04-02 13:18:48 -0300 |
commit | c4ac732a0377d1544a8385393a9877b693ff0652 (patch) | |
tree | 1c1ec4f87f91925139749c0173e5dc54e61766cd | |
parent | 8cc5ec1f754355ed788838390e86389c9ffb7590 (diff) | |
download | linux-stable-c4ac732a0377d1544a8385393a9877b693ff0652.tar.gz linux-stable-c4ac732a0377d1544a8385393a9877b693ff0652.tar.bz2 linux-stable-c4ac732a0377d1544a8385393a9877b693ff0652.zip |
perf lock: Support using -f to override perf.data file ownership
Enable perf lock to use perf.data when it is not owned by current user
or root.
Example:
# perf lock record ls
# chown Yunlong.Song:Yunlong.Song perf.data
# ls -al perf.data
-rw------- 1 Yunlong.Song Yunlong.Song 4880686 Apr 2 14:14 perf.data
# id
uid=0(root) gid=0(root) groups=0(root),64(pkcs11)
Before this patch:
# perf lock report
File perf.data not owned by current user or root (use -f to override)
Initializing perf session failed
# perf lock report -f
Error: unknown switch `f'
usage: perf lock report [<options>]
-k, --key <acquired> key for sorting (acquired / contended /
avg_wait / wait_total / wait_max / wait_min)
As shown above, the -f option does not work at all.
After this patch:
# perf lock report
File perf.data not owned by current user or root (use -f to override)
Initializing perf session failed
# perf lock report -f
Name acquired contended avg wait (ns) total wait (ns) ...
&ldata->output_l... 128 0 0 0 ...
&ctx->lock 114 0 0 0 ...
&p->pi_lock 112 0 0 0 ...
&(&pool->lock)->... 112 0 0 0 ...
&(&dentry->d_loc... 70 0 0 0 ...
&(&newf->file_lo... 62 0 0 0 ...
&(&fs->lock)->rl... 43 0 0 0 ...
...
As shown above, the -f option really works now.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1427982439-27388-6-git-send-email-yunlong.song@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/builtin-lock.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c index 7893a9bba2a7..d49c2ab85fc2 100644 --- a/tools/perf/builtin-lock.c +++ b/tools/perf/builtin-lock.c @@ -846,6 +846,8 @@ static const struct perf_evsel_str_handler lock_tracepoints[] = { { "lock:lock_release", perf_evsel__process_lock_release, }, /* CONFIG_LOCKDEP */ }; +static bool force; + static int __cmd_report(bool display_info) { int err = -EINVAL; @@ -857,6 +859,7 @@ static int __cmd_report(bool display_info) struct perf_data_file file = { .path = input_name, .mode = PERF_DATA_MODE_READ, + .force = force, }; session = perf_session__new(&file, false, &eops); @@ -945,6 +948,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused) "dump thread list in perf.data"), OPT_BOOLEAN('m', "map", &info_map, "map of lock instances (address:name table)"), + OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_END() }; const struct option lock_options[] = { @@ -956,6 +960,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused) const struct option report_options[] = { OPT_STRING('k', "key", &sort_key, "acquired", "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"), + OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), /* TODO: type */ OPT_END() }; |