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

..

android.txt

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arm-coresight.txt

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asciidoc.conf

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asciidoctor-extensions.rb

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build-docdep.perl

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build-xed.txt

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Build.txt

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callchain-overhead-calculation.txt

perf report: Add latency and parallelism profiling documentation

2025-02-18 14:04:32 -08:00

cat-texi.perl

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cpu-and-latency-overheads.txt

perf report: Add latency and parallelism profiling documentation

2025-02-18 14:04:32 -08:00

db-export.txt

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examples.txt

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guest-files.txt

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guestmount.txt

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intel-bts.txt

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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

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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

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Makefile

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manpage-1.72.xsl

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manpage-base.xsl

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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

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perf-buildid-cache.txt

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perf-buildid-list.txt

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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

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perf-data.txt

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perf-diff.txt

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perf-dlfilter.txt

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perf-evlist.txt

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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

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perf-intel-pt.txt

perf intel-pt: Add documentation for pause / resume

2024-12-18 16:24:32 -03:00

perf-iostat.txt

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perf-kallsyms.txt

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perf-kmem.txt

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perf-kvm.txt

perf docs: Refine the description for the buffer size

2024-08-12 13:59:22 -03:00

perf-kwork.txt

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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

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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

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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

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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

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perf.data-directory-format.txt

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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

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perfconfig.example

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security.txt

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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