#
0bdfbd04 |
|
08-Feb-2024 |
Adrian Hunter <adrian.hunter@intel.com> |
perf tools: Make it possible to see perf's kernel and module memory mappings Dump kmaps if using 'perf --debug kmaps' or verbose > 2 (e.g. -vvv) for tools 'perf script' and 'perf report' if there is no browser. Example: $ perf --debug kmaps script 2>&1 >/dev/null | grep kvm.intel build id event received for /lib/modules/6.7.2-local/kernel/arch/x86/kvm/kvm-intel.ko: 0691d75e10e72ebbbd45a44c59f6d00a5604badf [20] Map: 0-3a3 4f5d8 [kvm_intel].modinfo Map: 0-5240 5f280 [kvm_intel]__versions Map: 0-30 64 [kvm_intel].note.Linux Map: 0-14 644c0 [kvm_intel].orc_header Map: 0-5297 43680 [kvm_intel].rodata Map: 0-5bee 3b837 [kvm_intel].text.unlikely Map: 0-7e0 41430 [kvm_intel].noinstr.text Map: 0-2080 713c0 [kvm_intel].bss Map: 0-26 705c8 [kvm_intel].data..read_mostly Map: 0-5888 6a4c0 [kvm_intel].data Map: 0-22 70220 [kvm_intel].data.once Map: 0-40 705f0 [kvm_intel].data..percpu Map: 0-1685 41d20 [kvm_intel].init.text Map: 0-4b8 6fd60 [kvm_intel].init.data Map: 0-380 70248 [kvm_intel]__dyndbg Map: 0-8 70218 [kvm_intel].exit.data Map: 0-438 4f980 [kvm_intel]__param Map: 0-5f5 4ca0f [kvm_intel].rodata.str1.1 Map: 0-3657 493b8 [kvm_intel].rodata.str1.8 Map: 0-e0 70640 [kvm_intel].data..ro_after_init Map: 0-500 70ec0 [kvm_intel].gnu.linkonce.this_module Map: ffffffffc13a7000-ffffffffc1421000 a0 /lib/modules/6.7.2-local/kernel/arch/x86/kvm/kvm-intel.ko The example above shows how the module section mappings are all wrong except for the main .text mapping at 0xffffffffc13a7000. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Like Xu <like.xu.linux@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240208085326.13432-2-adrian.hunter@intel.com
|
#
72108c0b |
|
31-Oct-2023 |
Yang Jihong <yangjihong1@huawei.com> |
perf tools: Add --debug-file option to redirect debug output Currently, debug messages is output to stderr, add --debug-file option to support redirection to a specified file. Some test scenarios: # perf --list-opts --help --version --exec-path --html-path --paginate --no-pager --debugfs-dir --buildid-dir --list-cmds --list-opts --debug --debug-file # perf --debug-file No path given for --debug-file. Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS] # perf --debug-file /sys/perf.log record -v true Open debug file '/sys/perf.log' failed: Permission denied Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS] # perf --debug-file /tmp/perf.log record -v true [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.013 MB perf.data (26 samples) ] # cat /tmp/perf.log DEBUGINFOD_URLS= Using CPUID GenuineIntel-6-3E-4 nr_cblocks: 0 affinity: SYS mmap flush: 1 comp level: 0 mmap size 528384B Control descriptor is not initialized mmap size 528384B Looking at the vmlinux_path (8 entries long) Using /proc/kcore for kernel data Using /proc/kallsyms for symbols symbol:unmap_start file:(null) line:0 offset:0 return:0 lazy:(null) symbol:unmap_complete file:(null) line:0 offset:0 return:0 lazy:(null) symbol:map_start file:(null) line:0 offset:0 return:0 lazy:(null) symbol:map_complete file:(null) line:0 offset:0 return:0 lazy:(null) symbol:reloc_start file:(null) line:0 offset:0 return:0 lazy:(null) symbol:reloc_complete file:(null) line:0 offset:0 return:0 lazy:(null) symbol:init_start file:(null) line:0 offset:0 return:0 lazy:(null) symbol:init_complete file:(null) line:0 offset:0 return:0 lazy:(null) symbol:lll_lock_wait_private file:(null) line:0 offset:0 return:0 lazy:(null) symbol:lll_lock_wait file:(null) line:0 offset:0 return:0 lazy:(null) symbol:setjmp file:(null) line:0 offset:0 return:0 lazy:(null) symbol:longjmp file:(null) line:0 offset:0 return:0 lazy:(null) symbol:longjmp_target file:(null) line:0 offset:0 return:0 lazy:(null) failed to write feature HYBRID_TOPOLOGY Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20231031105523.1472558-1-yangjihong1@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
2adacd7f |
|
13-Apr-2022 |
James Clark <james.clark@arm.com> |
perf docs: Add man page entry for Arm SPE The SPE integration in Perf has quite a few usability quirks that can't be found by just reading the reference manual. So document this and at the same time add a summary of the feature that is also hard to find elsewhere. Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: James Clark <james.clark@arm.com> Co-authored-by: Al Grant <al.grant@arm.com> Co-authored-by: Luke Dare <Luke.Dare@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: German Gomez <german.gomez@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20220413084021.2556142-1-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
0ff26efe |
|
04-Apr-2022 |
Michael Petlan <mpetlan@redhat.com> |
perf docs: Add perf-iostat link to manpages Signed-off-by: Michael Petlan <mpetlan@redhat.com> Acked-by: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20220404221541.30312-1-mpetlan@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
9bb8b74b |
|
19-Nov-2020 |
Ian Rogers <irogers@google.com> |
perf docs: Add man pages to see also Add all other man pages to the "see also" list except for perf-script-perl and perf-script-python that are linked to from perf-script. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20201120063037.3166069-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
99f63817 |
|
09-Sep-2020 |
Zejiang Tang <tangzejiang@loongson.cn> |
perf docs: Improve help information in perf.txt perf has many undocumented options, such as:-vv, --exec-path, --html-path, -p, --paginate,--no-pager, --debugfs-dir, --buildid-dir, --list-cmds, --list-opts. Add entris for these options in perf.txt. Signed-off-by: Zejiang Tang <tangzejiang@loongson.cn> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Link: http://lore.kernel.org/lkml/1599645194-8438-1-git-send-email-tangzejiang@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
ccd26741 |
|
08-Nov-2019 |
Ravi Bangoria <ravi.bangoria@linux.ibm.com> |
perf tool: Provide an option to print perf_event_open args and return value Perf record with verbose=2 already prints this information along with whole lot of other traces which requires lot of scrolling. Introduce an option to print only perf_event_open() arguments and return value. Sample o/p: $ perf --debug perf-event-open=1 record -- ls > /dev/null ------------------------------------------------------------ perf_event_attr: size 112 { sample_period, sample_freq } 4000 sample_type IP|TID|TIME|PERIOD read_format ID disabled 1 inherit 1 exclude_kernel 1 mmap 1 comm 1 freq 1 enable_on_exec 1 task 1 precise_ip 3 sample_id_all 1 exclude_guest 1 mmap2 1 comm_exec 1 ksymbol 1 bpf_event 1 ------------------------------------------------------------ sys_perf_event_open: pid 4308 cpu 0 group_fd -1 flags 0x8 = 4 sys_perf_event_open: pid 4308 cpu 1 group_fd -1 flags 0x8 = 5 sys_perf_event_open: pid 4308 cpu 2 group_fd -1 flags 0x8 = 6 sys_perf_event_open: pid 4308 cpu 3 group_fd -1 flags 0x8 = 8 sys_perf_event_open: pid 4308 cpu 4 group_fd -1 flags 0x8 = 9 sys_perf_event_open: pid 4308 cpu 5 group_fd -1 flags 0x8 = 10 sys_perf_event_open: pid 4308 cpu 6 group_fd -1 flags 0x8 = 11 sys_perf_event_open: pid 4308 cpu 7 group_fd -1 flags 0x8 = 12 ------------------------------------------------------------ perf_event_attr: type 1 size 112 config 0x9 watermark 1 sample_id_all 1 bpf_event 1 { wakeup_events, wakeup_watermark } 1 ------------------------------------------------------------ sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 sys_perf_event_open failed, error -13 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (9 samples) ] Committer notes: Just like the 'verbose' variable this new 'debug_peo_args' needs to be added to util/python.c, since we don't link the debug.o file in the python binding, which ended up making 'perf test python' fail with: # perf test -v python 18: 'import perf' in python : --- start --- test child forked, pid 19237 Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: debug_peo_args test child finished with -1 ---- end ---- 'import perf' in python: FAILED! # After adding that new variable to util/python.c: # perf test -v python 18: 'import perf' in python : --- start --- test child forked, pid 22364 test child finished with 0 ---- end ---- 'import perf' in python: Ok # Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lore.kernel.org/lkml/20191108094128.28769-1-ravi.bangoria@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
6cf62656 |
|
13-May-2019 |
Thomas Richter <tmricht@linux.ibm.com> |
perf docs: Add description for stderr 'perf report' displays recorded data on the screen and emits warnings and debug messages in the status line (last one on screen). perf also supports the possibility to write all debug messages to stderr (instead of writing them to the status line). This is achieved with the following command: # ./perf --debug stderr=1 report -vvvvv -i ~/fast.data 2>/tmp/2 # ll /tmp/2 -rw-rw-r-- 1 tmricht tmricht 5420835 May 7 13:46 /tmp/2 # The usage of variable stderr=1 is not documented, so add it to the perf man page. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Link: http://lkml.kernel.org/r/20190513080220.91966-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
a1853e2c |
|
05-Oct-2015 |
Jiri Olsa <jolsa@kernel.org> |
perf tools: Handle -h and -v options Adding handling for '-h' and '-v' options to invoke help and version command respectively. Current behaviour is: $ perf -v Unknown option: -v Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS] $ perf -h Unknown option: -h Usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS] New behaviour: $ perf -h usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS] The most commonly used perf commands are: annotate Read perf.data (created by perf record) and display annotated code archive Create archive with object files with build-ids found in perf.data file bench General framework for benchmark suites ... $ perf -v perf version 4.3.rc3.gc99e32 Updated man page. Requested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1444068369-20978-10-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
edbe9817 |
|
20-Feb-2015 |
Jiri Olsa <jolsa@kernel.org> |
perf data: Add perf data to CTF conversion support Adding 'perf data convert' to convert perf data file into different format. This patch adds support for CTF format conversion. To convert perf.data into CTF run: $ perf data convert --to-ctf=./ctf-data/ [ perf data convert: Converted 'perf.data' into CTF data './ctf-data/' ] [ perf data convert: Converted and wrote 11.268 MB (100230 samples) ] The command will create CTF metadata out of perf.data file (or one specified via -i option) and then convert all sample events into single CTF stream. Each sample_type bit is translated into separated CTF event field apart from following exceptions: PERF_SAMPLE_RAW - added in next patch PERF_SAMPLE_READ - TODO PERF_SAMPLE_CALLCHAIN - TODO PERF_SAMPLE_BRANCH_STACK - TODO PERF_SAMPLE_REGS_USER - TODO PERF_SAMPLE_STACK_USER - TODO $ perf --debug=data-convert=2 data convert ... The converted CTF data could be analyzed by CTF tools, like babletrace or tracecompass [1]. $ babeltrace ./ctf-data/ [03:19:13.962125533] (+?.?????????) cycles: { }, { ip = 0xFFFFFFFF8105443A, tid = 20714, pid = 20714, period = 1 } [03:19:13.962130001] (+0.000004468) cycles: { }, { ip = 0xFFFFFFFF8105443A, tid = 20714, pid = 20714, period = 1 } [03:19:13.962131936] (+0.000001935) cycles: { }, { ip = 0xFFFFFFFF8105443A, tid = 20714, pid = 20714, period = 8 } [03:19:13.962133732] (+0.000001796) cycles: { }, { ip = 0xFFFFFFFF8105443A, tid = 20714, pid = 20714, period = 114 } [03:19:13.962135557] (+0.000001825) cycles: { }, { ip = 0xFFFFFFFF8105443A, tid = 20714, pid = 20714, period = 2087 } [03:19:13.962137627] (+0.000002070) cycles: { }, { ip = 0xFFFFFFFF81361938, tid = 20714, pid = 20714, period = 37582 } [03:19:13.962161091] (+0.000023464) cycles: { }, { ip = 0xFFFFFFFF8124218F, tid = 20714, pid = 20714, period = 600246 } [03:19:13.962517569] (+0.000356478) cycles: { }, { ip = 0xFFFFFFFF811A75DB, tid = 20714, pid = 20714, period = 1325731 } [03:19:13.969518008] (+0.007000439) cycles: { }, { ip = 0x34080917B2, tid = 20714, pid = 20714, period = 1144298 } The following members to the ctf-environment were decided to be added to distinguish and specify perf CTF data: - domain It says "kernel" because it contains a kernel trace (not to be confused with a user space like lttng-ust does) - tracer_name It says perf. This can be used to distinguish between lttng and perf CTF based trace. - version The kernel version from stream. In addition to release, this is what it looks like on a Debian kernel: release = "3.14-1-amd64"; version = "3.14.0"; [1] http://projects.eclipse.org/projects/tools.tracecompass Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: David Ahern <dsahern@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jeremie Galarneau <jgalar@efficios.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1424470628-5969-4-git-send-email-jolsa@kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
99ce8e9f |
|
01-Dec-2014 |
Jiri Olsa <jolsa@kernel.org> |
perf tools: Add --buildid-dir option to set cache directory Adding --buildid-dir to be able to set specific cache directory. It's going to be handy for buildid tests coming in shortly. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1417460789-13874-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
bbb2cea7 |
|
16-Jul-2014 |
Jiri Olsa <jolsa@redhat.com> |
perf tools: Add --debug optionto set debug variable Adding --debug option as a way to setup debug variables. Starting with support for verbose, more will come. It's possible to use it now with report command: $ perf --debug verbose ... $ perf --debug verbose=2 ... I'll need this support to add separated debug variable for ordered events change in order to separate debug output out of standard verbose stream. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20140717105500.GG516@krava.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
#
0895cf0a |
|
13-Jan-2010 |
Kirill Smelkov <kirr@landau.phys.spbu.ru> |
perf: Fix few typos + cosmetics Signed-off-by: Kirill Smelkov <kirr@landau.phys.spbu.ru> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1263396139-4798-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
#
86470930 |
|
06-Jun-2009 |
Ingo Molnar <mingo@elte.hu> |
perf_counter tools: Move from Documentation/perf_counter/ to tools/perf/ Several people have suggested that 'perf' has become a full-fledged tool that should be moved out of Documentation/. Move it to the (new) tools/ directory. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
|