Commit-ID: f0bbd602268e69f4f428075c645391d64bdd6c9f
Gitweb: http://git.kernel.org/tip/f0bbd602268e69f4f428075c645391d64bdd6c9f
Author: Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Wed, 28 Sep 2016 13:45:38 -0300
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Wed, 28 Sep 2016 13:48:04 -0300
perf trace: Beautify sched_[gs]et_attr return value
Both return errno, show the string associated then.
More work needed to capture the sched_attr arg to beautify it in turn,
probably using BPF.
Before:
0.210 ( 0.001 ms): sched_setattr(uattr: 0x7ffc684f02b0) = -22
After the patch, for this sched_attr, all other parms are zero, so not
shown:
struct sched_attr attr = {
.size = sizeof(attr),
.sched_policy = SCHED_DEADLINE,
.sched_runtime = 10 * USECS_PER_SEC,
.sched_period = 30 * USECS_PER_SEC,
.sched_deadline = attr.sched_period,
};
0.321 ( 0.002 ms): sched_setattr(uattr: 0x7ffc44116da0) = -1 EINVAL
Invalid argument
[root@jouet c]# perf trace -e sched_setattr ./sched_deadline
Couldn't negotiate deadline: Invalid argument
0.229 ( 0.003 ms): sched_setattr(uattr: 0x7ffd8dcd8df0) = -1 EINVAL
Invalid argument
[root@jouet c]#
Now to figure out the reason for this EINVAL.
Cc: Adrian Hunter <[email protected]>
Cc: Clark Williams <[email protected]>
Cc: Daniel Bristot de Oliveira <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/builtin-trace.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b4fc1ab..1a54ce9 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -742,6 +742,8 @@ static struct syscall_fmt {
.arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },
{ .name = "rt_tgsigqueueinfo", .errmsg = true,
.arg_scnprintf = { [2] = SCA_SIGNUM, /* sig */ }, },
+ { .name = "sched_getattr", .errmsg = true, },
+ { .name = "sched_setattr", .errmsg = true, },
{ .name = "sched_setscheduler", .errmsg = true,
.arg_scnprintf = { [1] = SCA_SCHED_POLICY, /* policy */ }, },
{ .name = "seccomp", .errmsg = true,
