kernel/linux.git/tools/perf/builtin-script.c, branch v6.18.21

perf capstone: Move capstone functionality into its own file

2025-10-02T18:36:59+00:00

Capstone disassembly support was split between disasm.c and print_insn.c. Move support out of these files into capstone.[ch] and remove include capstone/capstone.h from those files. As disassembly routines can fail, make failure the only option without HAVE_LIBCAPSTONE_SUPPORT. For simplicity's sake, duplicate the read_symbol utility function. The intent with moving capstone support into a single file is that dynamic support, using dlopen for libcapstone, can be added in later patches. This can potentially always succeed or fail, so relying on ifdefs isn't sufficient. Using dlopen is a useful option to minimize the perf tools dependencies and potentially size. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Andi Kleen Cc: Athira Rajeev Cc: Bill Wendling Cc: Charlie Jenkins Cc: Collin Funk Cc: Dmitriy Vyukov Cc: Dr. David Alan Gilbert Cc: Eric Biggers Cc: Haibo Xu Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Justin Stitt Cc: Li Huafei Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Nathan Chancellor Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Song Liu Cc: Stephen Brennan Signed-off-by: Arnaldo Carvalho de Melo

perf script: Enable to present DTL entries

2025-10-01T14:22:05+00:00

The process_event() function in "builtin-script.c" invokes perf_sample__fprintf_synth() for displaying PERF_TYPE_SYNTH type events. if (attr->type == PERF_TYPE_SYNTH && PRINT_FIELD(SYNTH)) perf_sample__fprintf_synth(sample, evsel, fp); perf_sample__fprintf_synth() process the sample depending on the value in evsel->core.attr.config. Introduce perf_sample__fprintf_synth_vpadtl() and invoke this for PERF_SYNTH_POWERPC_VPA_DTL Sample output: ./perf record -a -e sched:*,vpa_dtl/dtl_all/ -c 1000000000 sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.300 MB perf.data ] ./perf script perf 13322 [002] 233.835807: sched:sched_switch: perf:13322 [120] R ==> migration/2:27 [0] migration/2 27 [002] 233.835811: sched:sched_migrate_task: comm=perf pid=13322 prio=120 orig_cpu=2 dest_cpu=3 migration/2 27 [002] 233.835818: sched:sched_stat_runtime: comm=migration/2 pid=27 runtime=9214 [ns] migration/2 27 [002] 233.835819: sched:sched_switch: migration/2:27 [0] S ==> swapper/2:0 [120] swapper 0 [002] 233.835822: vpa-dtl: timebase: 338954486062657 dispatch_reason:decrementer_interrupt, preempt_reason:H_CEDE, enqueue_to_dispatch_time:435, ready_to_enqueue_time:0, waiting_to_ready_time:34775058, processor_id: 202 c0000000000f8094 plpar_hcall_norets_notrace+0x18 ([kernel.kallsyms]) swapper 0 [001] 233.835886: vpa-dtl: timebase: 338954486095398 dispatch_reason:priv_doorbell, preempt_reason:H_CEDE, enqueue_to_dispatch_time:542, ready_to_enqueue_time:0, waiting_to_ready_time:1245360, processor_id: 201 c0000000000f8094 plpar_hcall_norets_notrace+0x18 ([kernel.kallsyms]) Reviewed-by: Adrian Hunter Signed-off-by: Athira Rajeev Tested-by: Tejas Manhas Tested-by: Venkat Rao Bagalkote Cc: Aboorva Devarajan Cc: Aditya Bodkhe Cc: Hari Bathini Cc: Ian Rogers Cc: Jiri Olsa Cc: Madhavan Srinivasan Cc: Namhyung Kim Cc: Shrikanth Hegde Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix duplicated words in documentation and comments

2025-10-01T12:44:02+00:00

- "the the" - "in in" - "a a" Reviewed-by: Ian Rogers Signed-off-by: Markus Heidelberg Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Signed-off-by: Arnaldo Carvalho de Melo

perf sample: Remove arch notion of sample parsing

2025-07-25T17:37:58+00:00

By definition arch sample parsing and synthesis will inhibit certain kinds of cross-platform record then analysis (report, script, etc.). Remove arch_perf_parse_sample_weight and arch_perf_synthesize_sample_weight replacing with a common implementation. Combine perf_sample p_stage_cyc and retire_lat as weight3 to capture the differing uses regardless of compiled for architecture. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-21-irogers@google.com Signed-off-by: Namhyung Kim

perf evlist: Change env variable to session

2025-07-25T17:37:56+00:00

The session holds a perf_env pointer env. In UI code container_of is used to turn the env to a session, but this assumes the session header's env is in use. Rather than a dubious container_of, hold the session in the evlist and derive the env from the session with evsel__env, perf_session__env, etc. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-11-irogers@google.com Signed-off-by: Namhyung Kim

perf session: Add accessor for session->header.env

2025-07-25T17:37:56+00:00

The perf_env from the header in the session is frequently accessed, add an accessor function rather than access directly. Cache the value to avoid repeated calls. No behavioral change. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250724163302.596743-10-irogers@google.com Signed-off-by: Namhyung Kim

perf stat: Move metric list from config to evlist

2025-07-11T19:36:40+00:00

The rblist of metric_event that then have a list of associated metric_expr is moved out of the stat_config and into the evlist. This is done as part of refactoring things for python, having the state split in two places complicates that implementation. The evlist is doing the harder work of enabling and disabling events, the metrics are needed to compute a value and it doesn't seem unreasonable to hang them from the evlist. Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250710235126.1086011-7-irogers@google.com Signed-off-by: Namhyung Kim

perf tools: display the new PERF_RECORD_BPF_METADATA event

2025-06-20T21:48:56+00:00

Here's some example "perf script -D" output for the new event type. The ": unhandled!" message is from tool.c, analogous to other behavior there. I've elided some rows with all NUL characters for brevity, and I wrapped one of the >75-column lines to fit in the commit guidelines. 0x50fc8@perf.data [0x260]: event: 84 . . ... raw event: size 608 bytes . 0000: 54 00 00 00 00 00 60 02 62 70 66 5f 70 72 6f 67 T.....`.bpf_prog . 0010: 5f 31 65 30 61 32 65 33 36 36 65 35 36 66 31 61 _1e0a2e366e56f1a . 0020: 32 5f 70 65 72 66 5f 73 61 6d 70 6c 65 5f 66 69 2_perf_sample_fi . 0030: 6c 74 65 72 00 00 00 00 00 00 00 00 00 00 00 00 lter............ . 0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [...] . 0110: 74 65 73 74 5f 76 61 6c 75 65 00 00 00 00 00 00 test_value...... . 0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [...] . 0150: 34 32 00 00 00 00 00 00 00 00 00 00 00 00 00 00 42.............. . 0160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ [...] 0 0x50fc8 [0x260]: PERF_RECORD_BPF_METADATA \ prog bpf_prog_1e0a2e366e56f1a2_perf_sample_filter entry 0: test_value = 42 : unhandled! Signed-off-by: Blake Jones Link: https://lore.kernel.org/r/20250612194939.162730-5-blakejones@google.com Signed-off-by: Namhyung Kim

perf script: Display off-cpu samples correctly

2025-05-06T00:51:31+00:00

No PERF_SAMPLE_CALLCHAIN in sample_type, but 'perf script' needs to display a callchain, have to specify manually. Also, prefer displaying a callchain: gvfs-afc-volume 2267 [001] 3829232.955656: 1001115340 offcpu-time: 77f05292603f __pselect+0xbf (/usr/lib/x86_64-linux-gnu/libc.so.6) 77f052a1801c [unknown] (/usr/lib/x86_64-linux-gnu/libusbmuxd-2.0.so.6.0.0) 77f052a18d45 [unknown] (/usr/lib/x86_64-linux-gnu/libusbmuxd-2.0.so.6.0.0) 77f05289ca94 start_thread+0x384 (/usr/lib/x86_64-linux-gnu/libc.so.6) 77f052929c3c clone3+0x2c (/usr/lib/x86_64-linux-gnu/libc.so.6) to a raw binary BPF output: BPF output: 0000: dd 08 00 00 db 08 00 00

...... 0008: cc ce ab 3b 00 00 00 00 Ϋ;.... 0010: 06 00 00 00 00 00 00 00 ........ 0018: 00 fe ff ff ff ff ff ff . 0020: 3f 60 92 52 f0 77 00 00 ?`.Rw.. 0028: 1c 80 a1 52 f0 77 00 00 ..Rw.. 0030: 45 8d a1 52 f0 77 00 00 E.Rw.. 0038: 94 ca 89 52 f0 77 00 00 ..Rw.. 0040: 3c 9c 92 52 f0 77 00 00 <..Rw.. 0048: 00 00 00 00 00 00 00 00 ........ 0050: 00 00 00 00 .... Reviewed-by: Ian Rogers Signed-off-by: Howard Chu Tested-by: Arnaldo Carvalho de Melo Tested-by: Gautam Menghani Tested-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20241108204137.2444151-9-howardchu95@gmail.com Link: https://lore.kernel.org/r/20250501022809.449767-8-howardchu95@gmail.com Signed-off-by: Arnaldo Carvalho de Melo

perf script: Fix output type for dynamically allocated core PMU's

2025-03-05T19:46:00+00:00

This patch was originally posted here: https://lore.kernel.org/all/20241213215421.661139-1-thomas.falcon@intel.com/ I have rebased on top of Arnaldo's patch here: https://lore.kernel.org/all/Z2XCi3PgstSrV0SE@x1/ The original commit message: " perf script output may show different fields on different core PMU's that exist on heterogeneous platforms. For example, perf record -e "{cpu_core/mem-loads-aux/,cpu_core/event=0xcd,\ umask=0x01,ldlat=3,name=MEM_UOPS_RETIRED.LOAD_LATENCY/}:upp"\ -c10000 -W -d -a -- sleep 1 perf script: chromium-browse 46572 [002] 544966.882384: 10000 cpu_core/MEM_UOPS_RETIRED.LOAD_LATENCY/: 7ffdf1391b0c 10268100142 \ |OP LOAD|LVL L1 hit|SNP None|TLB L1 or L2 hit|LCK No|BLK N/A 5 7 0 7fad7c47425d [unknown] (/usr/lib64/libglib-2.0.so.0.8000.3) perf record -e cpu_atom/event=0xd0,umask=0x05,ldlat=3,\ name=MEM_UOPS_RETIRED.LOAD_LATENCY/upp -c10000 -W -d -a -- sleep 1 perf script: gnome-control-c 534224 [023] 544951.816227: 10000 cpu_atom/MEM_UOPS_RETIRED.LOAD_LATENCY/: 7f0aaaa0aae0 [unknown] (/usr/lib64/libglib-2.0.so.0.8000.3) Some fields, such as data_src, are not included by default. The cause is that while one PMU may be assigned a type such as PERF_TYPE_RAW, other core PMU's are dynamically allocated at boot time. If this value does not match an existing PERF_TYPE_X value, output_type(perf_event_attr.type) will return OUTPUT_TYPE_OTHER. Instead search for a core PMU with a matching perf_event_attr type and, if one is found, return PERF_TYPE_RAW to match output of other core PMU's. " Suggested-by: Kan Liang Suggested-by: Ian Rogers Signed-off-by: Thomas Falcon Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20250305163935.1605312-1-thomas.falcon@intel.com Signed-off-by: Namhyung Kim