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linux/tools/perf/Documentation
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Ian Rogers 53b00ff358 perf record: Make --buildid-mmap the default 
Support for build IDs in mmap2 perf events has been present since
Linux v5.12:
https://lore.kernel.org/lkml/20210219194619.1780437-1-acme@kernel.org/
Build ID mmap events don't avoid the need to inject build IDs for DSO
touched by samples as the build ID cache is populated by perf
record. They can avoid some cases of symbol mis-resolution caused by
the file system changing from when a sample occurred and when the DSO
is sought.

Unlike the --buildid-mmap option, this chnage doesn't disable the
build ID cache but it does disable the processing of samples looking
for DSOs to inject build IDs for. To disable the build ID cache the -B
(--no-buildid) option should be used.

Making this option the default was raised on the list in:
https://lore.kernel.org/linux-perf-users/CAP-5=fXP7jN_QrGUcd55_QH5J-Y-FCaJ6=NaHVtyx0oyNh8_-Q@mail.gmail.com/

Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250724163302.596743-9-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
 		2025-07-25 10:37:56 -07:00
..
Build.txt perf docs: Document cross compilation 2024-07-26 11:15:55 -07:00
Makefile perf doc: Add support for KBUILD_BUILD_TIMESTAMP 2023-05-15 17:49:01 -03:00
android.txt perf tools: Update android build documentation 2016-07-04 20:27:27 -03:00
arm-coresight.txt perf docs: Fix man page build wrt perf-arm-coresight.txt 2022-10-25 17:40:48 -03:00
asciidoc.conf perf docs: Allow man page date to be specified 2019-09-27 09:26:14 -03:00
asciidoctor-extensions.rb perf Documentation: Support for asciidoctor 2018-04-26 13:47:10 -03:00
build-docdep.perl perf doc: Fix doc.dep 2021-08-02 09:56:17 -03:00
build-xed.txt perf script: Add --insn-trace for instruction decoding 2018-10-24 15:29:50 -03:00
callchain-overhead-calculation.txt perf report: Add latency and parallelism profiling documentation 2025-02-18 14:04:32 -08:00
cat-texi.perl perf doc: Fix perfman.info build 2021-08-02 09:56:17 -03:00
cpu-and-latency-overheads.txt perf report: Add latency and parallelism profiling documentation 2025-02-18 14:04:32 -08:00
db-export.txt perf db-export: Add brief documentation 2019-06-05 09:47:57 -03:00
examples.txt perf tools: Replace lkml.org links with lore 2021-02-11 12:54:27 -03:00
guest-files.txt perf tools: Tidy guest option documentation 2022-08-11 18:50:17 -03:00
guestmount.txt perf tools: Tidy guest option documentation 2022-08-11 18:50:17 -03:00
intel-bts.txt
…
intel-hybrid.txt perf tools: Fix up some comments and code to properly use the event_source bus 2025-02-19 13:23:43 -08:00
intel-pt.txt perf intel-pt: Update intel-pt.txt file with new location of the documentation 2020-03-11 11:00:33 -03:00
itrace.txt perf arm-spe: Update --itrace help text 2024-10-29 16:10:17 -07:00
jit-interface.txt
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jitdump-specification.txt perf doc: Fix typos all over the place 2021-09-27 09:32:28 -03:00
manpage-1.72.xsl
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manpage-base.xsl
…
manpage-bold-literal.xsl
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manpage-normal.xsl
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manpage-suppress-sp.xsl
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perf-amd-ibs.txt perf mem: Document new output fields (op, cache, mem, dtlb, snoop) 2025-06-16 14:05:10 -03:00
perf-annotate.txt perf annotate: Add --code-with-type option. 2025-03-13 00:19:51 -07:00
perf-archive.txt
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perf-arm-spe.txt perf docs: arm_spe: Document new discard mode 2025-01-10 14:50:55 +00:00
perf-bench.txt perf bench sched pipe: Add -G/--cgroups option 2023-10-25 10:02:10 -07:00
perf-buildid-cache.txt perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
perf-buildid-list.txt perf buildid-list: Add a "-m" option to show kernel and modules build-ids 2022-07-18 16:35:34 -03:00
perf-c2c.txt perf mem/c2c amd: Add ldlat support 2025-04-29 22:30:46 -03:00
perf-check.txt tools: Remove libcrypto dependency 2025-06-26 10:51:41 -07:00
perf-config.txt perf intel-pt: Do not default to recording all switch events 2025-05-12 14:18:16 -03:00
perf-daemon.txt perf daemon: Add examples to man page 2021-02-11 10:19:52 -03:00
perf-data.txt perf data: Add JSON export 2021-04-29 10:30:58 -03:00
perf-diff.txt perf tools: Make quiet mode consistent between tools 2022-10-27 16:37:26 -03:00
perf-dlfilter.txt perf dlfilter: Add al_cleanup() 2023-08-15 16:41:49 -03:00
perf-evlist.txt perf tools: Fix documentation of verbose options 2021-03-06 16:54:26 -03:00
perf-ftrace.txt perf: ftrace: add graph tracer options args/retval/retval-hex/retaddr 2025-07-22 17:47:22 -07:00
perf-help.txt
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perf-inject.txt perf inject: Clarify build-id options a little bit 2022-10-04 08:55:22 -03:00
perf-intel-pt.txt perf intel-pt: Add documentation for pause / resume 2024-12-18 16:24:32 -03:00
perf-iostat.txt perf docs: Fix accidental em-dashes 2021-08-10 11:05:21 -03:00
perf-kallsyms.txt perf tools: Fix documentation of verbose options 2021-03-06 16:54:26 -03:00
perf-kmem.txt perf kmem: Improve man page for record options 2021-10-08 16:10:02 -03:00
perf-kvm.txt perf docs: Refine the description for the buffer size 2024-08-12 13:59:22 -03:00
perf-kwork.txt perf docs: Fix typos 2024-05-28 22:52:28 -07:00
perf-list.txt perf parse-events: Allow the cpu term to be a PMU or CPU range 2025-07-24 13:41:35 -07:00
perf-lock.txt perf lock contention: Reject more than 10ms delays for safety 2025-05-31 08:45:24 -03:00
perf-mem.txt perf mem: Document new output fields (op, cache, mem, dtlb, snoop) 2025-06-16 14:05:10 -03:00
perf-probe.txt perf docs: Fix a typo in 'perf probe' man page: l20th -> 120th 2023-01-19 09:49:59 -03:00
perf-record.txt perf record: Make --buildid-mmap the default 2025-07-25 10:37:56 -07:00
perf-report.txt perf report: Add 'tgid' sort key 2025-05-13 17:51:32 -03:00
perf-sched.txt perf sched timehist: Add pre-migration wait time option 2024-10-14 12:04:31 -07:00
perf-script-perl.txt perf tools docs: Use canonical ftrace path 2023-02-02 16:32:19 -03:00
perf-script-python.txt perf scripting python: Add function to get a config value 2024-09-24 11:47:03 -07:00
perf-script.txt perf script: Update brstack syntax documentation 2025-03-14 10:41:08 -07:00
perf-stat.txt perf stat: Fix uncore aggregation number 2025-06-27 16:14:10 -07:00
perf-test.txt perf test: Improve verbose documentation 2025-01-16 11:01:03 -08:00
perf-timechart.txt perf timechart: Document missing --force option 2017-11-16 14:50:06 -03:00
perf-top.txt perf docs: Refine the description for the buffer size 2024-08-12 13:59:22 -03:00
perf-trace.txt perf trace: Remove --map-dump documentation 2025-06-09 11:18:19 -07:00
perf-version.txt perf version: Add man page 2018-04-02 13:52:23 -03:00
perf.data-directory-format.txt perf record: Put a copy of kcore into the perf.data directory 2019-11-06 15:43:05 -03:00
perf.data-file-format.txt perf record: Add 8-byte aligned event type PERF_RECORD_COMPRESSED2 2025-05-16 17:31:40 -03:00
perf.txt perf doc: Add AMD IBS usage document 2024-06-20 16:51:55 -07:00
perfconfig.example perf config: Show default report configuration in example and docs 2016-09-01 09:44:13 -03:00
security.txt perf docs: Introduce security.txt file to document related issues 2020-05-28 10:03:26 -03:00
tips.txt perf report: Add latency and parallelism profiling documentation 2025-02-18 14:04:32 -08:00
topdown.txt perf Document: Add TPEBS (Timed PEBS(Precise Event-Based Sampling)) to Documents 2024-08-13 15:25:33 -03:00