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The 'perf kwork' tool is used to trace time properties of kernel work
(such as irq, softirq, and workqueue), including runtime, latency, and
timehist, using the infrastructure in the perf tools to allow tracing
extra targets.
This is the first commit to reuse the 'perf record' framework code to
implement a simple record function, kwork is not supported currently.
Test cases:
# perf
usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]
The most commonly used perf commands are:
<SNIP>
iostat Show I/O performance metrics
kallsyms Searches running kernel for symbols
kmem Tool to trace/measure kernel memory properties
kvm Tool to trace/measure kvm guest os
kwork Tool to trace/measure kernel work properties (latencies)
list List all symbolic event types
lock Analyze lock events
mem Profile memory accesses
record Run a command and record its profile into perf.data
<SNIP>
See 'perf help COMMAND' for more information on a specific command.
# perf kwork
Usage: perf kwork [<options>] {record}
-D, --dump-raw-trace dump raw trace in ASCII
-f, --force don't complain, do it
-k, --kwork <kwork> list of kwork to profile
-v, --verbose be more verbose (show symbol address, etc)
# perf kwork record -- sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 1.787 MB perf.data ]
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-2-yangjihong1@huawei.com
[ Add {} for multiline if blocks ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BUILTIN_H
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#define BUILTIN_H
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extern const char perf_usage_string[];
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extern const char perf_more_info_string[];
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void list_common_cmds_help(void);
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const char *help_unknown_cmd(const char *cmd);
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int cmd_annotate(int argc, const char **argv);
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int cmd_bench(int argc, const char **argv);
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int cmd_buildid_cache(int argc, const char **argv);
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int cmd_buildid_list(int argc, const char **argv);
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int cmd_config(int argc, const char **argv);
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int cmd_c2c(int argc, const char **argv);
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int cmd_diff(int argc, const char **argv);
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int cmd_evlist(int argc, const char **argv);
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int cmd_help(int argc, const char **argv);
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int cmd_sched(int argc, const char **argv);
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int cmd_kallsyms(int argc, const char **argv);
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int cmd_list(int argc, const char **argv);
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int cmd_record(int argc, const char **argv);
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int cmd_report(int argc, const char **argv);
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int cmd_stat(int argc, const char **argv);
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int cmd_timechart(int argc, const char **argv);
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int cmd_top(int argc, const char **argv);
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int cmd_script(int argc, const char **argv);
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int cmd_version(int argc, const char **argv);
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int cmd_probe(int argc, const char **argv);
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int cmd_kmem(int argc, const char **argv);
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int cmd_lock(int argc, const char **argv);
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int cmd_kvm(int argc, const char **argv);
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int cmd_test(int argc, const char **argv);
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int cmd_trace(int argc, const char **argv);
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int cmd_inject(int argc, const char **argv);
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int cmd_mem(int argc, const char **argv);
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int cmd_data(int argc, const char **argv);
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int cmd_ftrace(int argc, const char **argv);
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int cmd_daemon(int argc, const char **argv);
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int cmd_kwork(int argc, const char **argv);
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int find_scripts(char **scripts_array, char **scripts_path_array, int num,
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int pathlen);
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#endif
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