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| author | Clark Williams <williams@redhat.com> | 2009-04-30 15:27:15 -0500 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2009-04-30 15:27:15 -0500 |
| commit | 95bd88ca5a69195466d476b104ced8b5ab352a38 (patch) | |
| tree | 45f73fc48e902e13acf54a20759f0d9acd799b8a | |
| parent | 3fc59347e83bb9b8397b0508190b416d0dd53fdc (diff) | |
| download | rt-tests-95bd88ca5a69195466d476b104ced8b5ab352a38.tar.gz rt-tests-95bd88ca5a69195466d476b104ced8b5ab352a38.tar.xz | |
added code to usage message to show configured tracers if debugfs mounted
Signed-off-by: Clark Williams <williams@redhat.com>
| -rw-r--r-- | src/cyclictest/cyclictest.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/cyclictest/cyclictest.c b/src/cyclictest/cyclictest.c index cd63587..be9a3f9 100644 --- a/src/cyclictest/cyclictest.c +++ b/src/cyclictest/cyclictest.c @@ -1,7 +1,7 @@ /* * High resolution timer test software * - * (C) 2008-2008 Clark Williams <williams@redhat.com> + * (C) 2008-2009 Clark Williams <williams@redhat.com> * (C) 2005-2007 Thomas Gleixner <tglx@linutronix.de> * * This program is free software; you can redistribute it and/or @@ -724,6 +724,16 @@ out: /* Print usage information */ static void display_help(void) { + char tracers[MAX_PATH]; + + if (set_debugfileprefix()) + strcpy(tracers, "unavailable (debugfs not mounted)"); + else { + fileprefix = debugfileprefix; + if (kernvar(O_RDONLY, "available_tracers", tracers, sizeof(tracers))) + strcpy(tracers, "none"); + } + printf("cyclictest V %1.2f\n", VERSION_STRING); printf("Usage:\n" "cyclictest <options>\n\n" @@ -751,7 +761,8 @@ static void display_help(void) "-q --quiet print only a summary on exit\n" "-r --relative use relative timer instead of absolute\n" "-s --system use sys_nanosleep and sys_setitimer\n" - "-T TRACE --tracer=TRACE set tracing function\n" + "-T TRACE --tracer=TRACER set tracing function\n" + " configured tracers: %s\n" "-t --threads one thread per available processor\n" "-t [NUM] --threads=NUM number of threads:\n" " without NUM, threads = max_cpus\n" @@ -764,7 +775,8 @@ static void display_help(void) "-h --histogram=US dump a latency histogram to stdout after the run\n" " US is the max time to be be tracked in microseconds\n" "-w --wakeup task wakeup tracing (used with -b)\n" - "-W --wakeuprt rt task wakeup tracing (used with -b)\n" + "-W --wakeuprt rt task wakeup tracing (used with -b)\n", + tracers ); exit(0); } |