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perf trace: Beautify sched_setscheduler 'policy' argument 

$ trace -e sched_setscheduler chrt -f 1 usleep 1
  chrt: failed to set pid 0's policy: Operation not permitted
     0.005 ( 0.005 ms): chrt/19189 sched_setscheduler(policy: FIFO, param: 0x7ffec5273d70) = -1 EPERM Operation not permitted
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-i5vlo5n5jv0amt8bkyicmdxh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-04-06 12:51:33 -03:00
parent 85f8f966a1
commit a3bca91f2f
2 changed files with 48 additions and 0 deletions
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4
tools/perf/builtin-trace.c
View File

@ -1073,6 +1073,8 @@ static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
.arg_scnprintf = { [arg] = SCA_STRARRAY, }, \
.arg_parm = { [arg] = &strarray__##array, }
#include "trace/beauty/sched_policy.c"
static struct syscall_fmt {
const char *name;
const char *alias;
@ -1304,6 +1306,8 @@ static struct syscall_fmt {
.arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },
{ .name = "rt_tgsigqueueinfo", .errmsg = true,
.arg_scnprintf = { [2] = SCA_SIGNUM, /* sig */ }, },
{ .name = "sched_setscheduler", .errmsg = true,
.arg_scnprintf = { [1] = SCA_SCHED_POLICY, /* policy */ }, },
{ .name = "seccomp", .errmsg = true,
.arg_scnprintf = { [0] = SCA_SECCOMP_OP, /* op */
[1] = SCA_SECCOMP_FLAGS, /* flags */ }, },

44
tools/perf/trace/beauty/sched_policy.c Normal file
View File

@ -0,0 +1,44 @@
#include <sched.h>
/*
* Not defined anywhere else, probably, just to make sure we
* catch future flags
*/
#define SCHED_POLICY_MASK 0xff
#ifndef SCHED_DEADLINE
#define SCHED_DEADLINE 6
#endif
static size_t syscall_arg__scnprintf_sched_policy(char *bf, size_t size,
struct syscall_arg *arg)
{
const char *policies[] = {
"NORMAL", "FIFO", "RR", "BATCH", "ISO", "IDLE", "DEADLINE",
};
size_t printed;
int policy = arg->val,
flags = policy & ~SCHED_POLICY_MASK;
policy &= SCHED_POLICY_MASK;
if (policy <= SCHED_DEADLINE)
printed = scnprintf(bf, size, "%s", policies[policy]);
else
printed = scnprintf(bf, size, "%#x", policy);
#define P_POLICY_FLAG(n) \
if (flags & SCHED_##n) { \
printed += scnprintf(bf + printed, size - printed, "|%s", #n); \
flags &= ~SCHED_##n; \
}
P_POLICY_FLAG(RESET_ON_FORK);
#undef P_POLICY_FLAG
if (flags)
printed += scnprintf(bf + printed, size - printed, "|%#x", flags);
return printed;
}
#define SCA_SCHED_POLICY syscall_arg__scnprintf_sched_policy