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authorArnaldo Carvalho de Melo <acme@redhat.com>2016-09-28 13:45:38 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-09-28 13:48:04 -0300
commitf0bbd602268e69f4f428075c645391d64bdd6c9f (patch)
tree718a2af28176ca8185a82f513f6b6e85695357fe /tools/perf/builtin-trace.c
parentf2c8852e6e990fcab0d9e68de9d86e5fbea0b5dc (diff)
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 <adrian.hunter@intel.com> Cc: Clark Williams <williams@redhat.com> Cc: Daniel Bristot de Oliveira <bristot@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-tyot2n7e48zm8pdw8tbcm3sl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index b4fc1ab3d2a7..1a54ce9d101c 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,