Commit a3bca91f authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 85f8f966

tools/perf/builtin-trace.c

+4 −0
Original line number Diff line number Diff line
@@ -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 */ }, },

tools/perf/trace/beauty/sched_policy.c

0 → 100644
+44 −0
Original line number Diff line number Diff line 
#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

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