The 'perf kvm stat record' tool is an alias of 'perf record' with
predefined kvm related options. All options that passed to 'perf kvm
stat record' are processed by the 'perf record' tool. So, 'perf kvm stat
record --help' prints help of usage for the 'perf record'
command. There are a few options useful for 'perf kvm stat record', the
rest either break kvm related output or don't change it.
Let's print safe for 'perf kvm stat record' options in addition to
general 'perf record' --help output.
Signed-off-by: Alexander Yarygin <yary...@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Cc: Christian Borntraeger <borntrae...@de.ibm.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
---
tools/perf/builtin-kvm.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 43367eb..0c169d7 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1138,6 +1138,40 @@ exit:
_p; \
})
+static void print_record_help(void)
+{
+ fprintf(stderr, "\n usage: perf kvm stat record [<options>]\n\n");
+
+ fprintf(stderr, " -p, --pid <pid> record events on existing
process id\n");
+ fprintf(stderr, " -t, --tid <tid> record events on existing
thread id\n");
+ fprintf(stderr, " -r, --realtime <n> collect data with this RT
SCHED_FIFO priority\n");
+ fprintf(stderr, " --no-buffering collect data without
buffering\n");
+ fprintf(stderr, " -a, --all-cpus system-wide collection from
all CPUs\n");
+ fprintf(stderr, " -C, --cpu <cpu> list of cpus to monitor\n");
+ fprintf(stderr, " -c, --count <n> event period to sample\n");
+ fprintf(stderr, " -o, --output <file> output file name\n");
+ fprintf(stderr, " -i, --no-inherit child tasks do not inherit
counters\n");
+ fprintf(stderr, " -m, --mmap-pages <pages>\n");
+ fprintf(stderr, " number of mmap data pages\n");
+ fprintf(stderr, " -v, --verbose be more verbose (show counter
open errors, etc)\n");
+ fprintf(stderr, " -q, --quiet don't print any message\n");
+ fprintf(stderr, " -D, --delay <n> ms to wait before starting
measurement after program start\n");
+ fprintf(stderr, " -u, --uid <user> user to profile\n");
+ fprintf(stderr, " --per-thread use per-thread mmaps\n");
+
+ fprintf(stderr, "\nOtherwise, it is the alias of 'perf record:'\n");
+}
+
+static bool is_help_option(int argc, const char **argv)
+{
+ int i;
+
+ for (i = 0; i < argc; i++)
+ if (!strcmp(argv[i], "--help") || !strcmp(argv[i], "-h"))
+ return true;
+ return false;
+}
+
static int
kvm_events_record(struct perf_kvm_stat *kvm, int argc, const char **argv)
{
@@ -1150,6 +1184,10 @@ kvm_events_record(struct perf_kvm_stat *kvm, int argc,
const char **argv)
"-c", "1",
};
const char * const *events_tp;
+
+ if (argc == 1 || (argc > 1 && is_help_option(argc, argv)))
+ print_record_help();
+
events_tp_size = 0;
for (events_tp = kvm_events_tp; *events_tp; events_tp++)
--
1.9.1
--
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