Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 1/5] perf ftrace: Add 'trace' subcommand | Date | Wed, 15 Dec 2021 10:51:50 -0800 |
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This is a preparation to add more sub-commands for ftrace. The 'trace' subcommand does the same thing when no subcommand is given.
Committer testing:
The previous mode, i.e. no subcommand and the new 'perf ftrace trace' are equivalent:
# perf ftrace -G check_preempt_curr sleep 0.00001 # tracer: function_graph # # CPU DURATION FUNCTION CALLS # | | | | | | | 25) | check_preempt_curr() { 25) | resched_curr() { 25) | native_smp_send_reschedule() { 25) | default_send_IPI_single_phys() { 25) 0.110 us | __default_send_IPI_dest_field(); 25) 0.490 us | } 25) 0.640 us | } 25) 0.850 us | } 25) 2.060 us | } # perf ftrace trace -G check_preempt_curr sleep 0.00001 # tracer: function_graph # # CPU DURATION FUNCTION CALLS # | | | | | | | 10) | check_preempt_curr() { 10) | resched_curr() { 10) | native_smp_send_reschedule() { 10) | default_send_IPI_single_phys() { 10) 0.080 us | __default_send_IPI_dest_field(); 10) 0.460 us | } 10) 0.610 us | } 10) 0.830 us | } 10) 2.020 us | } #
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Changbin Du <changbin.du@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Link: https://lore.kernel.org/r/20211129231830.1117781-2-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/builtin-ftrace.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-)
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 87cb11a7a3ee..b28e762c5d54 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -879,17 +879,7 @@ int cmd_ftrace(int argc, const char **argv) .tracer = DEFAULT_TRACER, .target = { .uid = UINT_MAX, }, }; - const char * const ftrace_usage[] = { - "perf ftrace [<options>] [<command>]", - "perf ftrace [<options>] -- <command> [<options>]", - NULL - }; - const struct option ftrace_options[] = { - OPT_STRING('t', "tracer", &ftrace.tracer, "tracer", - "Tracer to use: function_graph(default) or function"), - OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]", - "Show available functions to filter", - opt_list_avail_functions, "*"), + const struct option common_options[] = { OPT_STRING('p', "pid", &ftrace.target.pid, "pid", "Trace on existing process id"), /* TODO: Add short option -t after -t/--tracer can be removed. */ @@ -901,6 +891,14 @@ int cmd_ftrace(int argc, const char **argv) "System-wide collection from all CPUs"), OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu", "List of cpus to monitor"), + OPT_END() + }; + const struct option ftrace_options[] = { + OPT_STRING('t', "tracer", &ftrace.tracer, "tracer", + "Tracer to use: function_graph(default) or function"), + OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]", + "Show available functions to filter", + opt_list_avail_functions, "*"), OPT_CALLBACK('T', "trace-funcs", &ftrace.filters, "func", "Trace given functions using function tracer", parse_filter_func), @@ -923,7 +921,15 @@ int cmd_ftrace(int argc, const char **argv) "Trace children processes"), OPT_UINTEGER('D', "delay", &ftrace.initial_delay, "Number of milliseconds to wait before starting tracing after program start"), - OPT_END() + OPT_PARENT(common_options), + }; + + const char * const ftrace_usage[] = { + "perf ftrace [<options>] [<command>]", + "perf ftrace [<options>] -- [<command>] [<options>]", + "perf ftrace trace [<options>] [<command>]", + "perf ftrace trace [<options>] -- [<command>] [<options>]", + NULL }; INIT_LIST_HEAD(&ftrace.filters); @@ -935,6 +941,11 @@ int cmd_ftrace(int argc, const char **argv) if (ret < 0) return -1; + if (argc > 1 && !strcmp(argv[1], "trace")) { + argc--; + argv++; + } + argc = parse_options(argc, argv, ftrace_options, ftrace_usage, PARSE_OPT_STOP_AT_NON_OPTION); if (!argc && target__none(&ftrace.target)) -- 2.34.1.173.g76aa8bc2d0-goog
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