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43a6446998
There's no way to enable PERF_SAMPLE_DATA_SRC without PERF_SAMPLE_ADDR
which brings a lot of overhead due to the number of MMAP[2] records.
Let's add a new option to enable this information separately.
Committer testing:
# perf record -a --sample-mem-info
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.815 MB perf.data (2637 samples) ]
#
# perf evlist -v
cycles:P: type: 0 (PERF_TYPE_HARDWARE), size: 136, config: 0 (PERF_COUNT_HW_CPU_CYCLES), { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CPU|PERIOD|IDENTIFIER|DATA_SRC, read_format: ID|LOST, disabled: 1, freq: 1, precise_ip: 2, sample_id_all: 1
dummy:u: type: 1 (PERF_TYPE_SOFTWARE), size: 136, config: 0x9 (PERF_COUNT_SW_DUMMY), { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER|DATA_SRC, read_format: ID|LOST, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
#
# perf report -D |& grep -w PERF_RECORD_SAMPLE -A3 -m1
0 44675164447282 0x1a7590 [0x40]: PERF_RECORD_SAMPLE(IP, 0x4001): 107299/107299: 0xffffffffac4a5e11 period: 144 addr: 0
. data_src: 0x229080142
... thread: perf:107299
...... dso: /lib/modules/6.15.0-rc4+/build/vmlinux
#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/20250430205548.789750-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Linux kernel
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