mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-12 01:20:14 +00:00
9b4525fd08
Save samples with deferred callchains in a separate list and deliver
them after merging the user callchains. If users don't want to merge
they can set tool->merge_deferred_callchains to false to prevent the
behavior.
With previous result, now perf script will show the merged callchains.
$ perf script
...
pwd 2312 121.163435: 249113 cpu/cycles/P:
ffffffff845b78d8 __build_id_parse.isra.0+0x218 ([kernel.kallsyms])
ffffffff83bb5bf6 perf_event_mmap+0x2e6 ([kernel.kallsyms])
ffffffff83c31959 mprotect_fixup+0x1e9 ([kernel.kallsyms])
ffffffff83c31dc5 do_mprotect_pkey+0x2b5 ([kernel.kallsyms])
ffffffff83c3206f __x64_sys_mprotect+0x1f ([kernel.kallsyms])
ffffffff845e6692 do_syscall_64+0x62 ([kernel.kallsyms])
ffffffff8360012f entry_SYSCALL_64_after_hwframe+0x76 ([kernel.kallsyms])
7f18fe337fa7 mprotect+0x7 (/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
7f18fe330e0f _dl_sysdep_start+0x7f (/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
7f18fe331448 _dl_start_user+0x0 (/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
...
The old output can be get using --no-merge-callchain option.
Also perf report can get the user callchain entry at the end.
$ perf report --no-children --stdio -q -S __build_id_parse.isra.0
# symbol: __build_id_parse.isra.0
8.40% pwd [kernel.kallsyms]
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---__build_id_parse.isra.0
perf_event_mmap
mprotect_fixup
do_mprotect_pkey
__x64_sys_mprotect
do_syscall_64
entry_SYSCALL_64_after_hwframe
mprotect
_dl_sysdep_start
_dl_start_user
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_TOOL_H
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#define __PERF_TOOL_H
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#include <stdbool.h>
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#include <linux/types.h>
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struct perf_session;
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union perf_event;
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struct evlist;
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struct evsel;
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struct perf_sample;
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struct perf_tool;
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struct machine;
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struct ordered_events;
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typedef int (*event_sample)(const struct perf_tool *tool, union perf_event *event,
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struct perf_sample *sample,
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struct evsel *evsel, struct machine *machine);
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typedef int (*event_op)(const struct perf_tool *tool, union perf_event *event,
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struct perf_sample *sample, struct machine *machine);
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typedef int (*event_attr_op)(const struct perf_tool *tool,
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union perf_event *event,
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struct evlist **pevlist);
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typedef int (*event_op2)(const struct perf_tool *tool, struct perf_session *session,
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union perf_event *event);
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typedef s64 (*event_op3)(const struct perf_tool *tool, struct perf_session *session,
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union perf_event *event);
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typedef int (*event_op4)(const struct perf_tool *tool, struct perf_session *session,
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union perf_event *event, u64 data, const char *str);
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typedef int (*event_oe)(const struct perf_tool *tool, union perf_event *event,
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struct ordered_events *oe);
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enum show_feature_header {
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SHOW_FEAT_NO_HEADER = 0,
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SHOW_FEAT_HEADER,
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SHOW_FEAT_HEADER_FULL_INFO,
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};
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struct perf_tool {
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event_sample sample,
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read,
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callchain_deferred;
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event_op mmap,
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mmap2,
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comm,
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namespaces,
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cgroup,
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fork,
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exit,
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lost,
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lost_samples,
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aux,
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itrace_start,
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aux_output_hw_id,
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context_switch,
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throttle,
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unthrottle,
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ksymbol,
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bpf,
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text_poke;
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event_attr_op attr;
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event_attr_op event_update;
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event_op2 tracing_data;
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event_oe finished_round;
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event_op2 build_id,
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id_index,
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auxtrace_info,
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auxtrace_error,
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time_conv,
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thread_map,
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cpu_map,
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stat_config,
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stat,
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stat_round,
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feature,
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finished_init,
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bpf_metadata;
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event_op4 compressed;
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event_op3 auxtrace;
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bool ordered_events;
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bool ordering_requires_timestamps;
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bool namespace_events;
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bool cgroup_events;
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bool no_warn;
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bool dont_split_sample_group;
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bool merge_deferred_callchains;
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enum show_feature_header show_feat_hdr;
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};
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void perf_tool__init(struct perf_tool *tool, bool ordered_events);
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bool perf_tool__compressed_is_stub(const struct perf_tool *tool);
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int process_event_sample_stub(const struct perf_tool *tool,
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union perf_event *event,
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struct perf_sample *sample,
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struct evsel *evsel,
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struct machine *machine);
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struct delegate_tool {
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/** @tool: The actual tool that calls the delegate. */
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struct perf_tool tool;
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/** @delegate: The tool that is delegated to. */
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struct perf_tool *delegate;
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};
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void delegate_tool__init(struct delegate_tool *tool, struct perf_tool *delegate);
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#endif /* __PERF_TOOL_H */
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