Changes in header.h

494c403f - perf header: Pass a perf_cpu rather than a PMU to get_cpuid_str

Thu, 07 Nov 2024 16:20:33 +0000

perf header: Pass a perf_cpu rather than a PMU to get_cpuid_strOn ARM the cpuid is dependent on the core type of the CPU inquestion. The PMU was passed for the sake of the CPU map but thismeans in places a temporary PMU is created just to pass a CPUvalue. Just pass the CPU and fix up the callers.As there are no longer PMU users in header.h, shuffle forwarddeclarations earlier to work around build failures.Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Xu Yang Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Athira Rajeev Cc: Ben Zong-You Xie Cc: Benjamin Gray Cc: Bibo Mao Cc: Clément Le Goffic Cc: Dima Kogan Cc: Dr. David Alan Gilbert Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Will Deacon Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgLink: https://lore.kernel.org/r/20241107162035.52206-7-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

538737da - perf arm64 header: Use cpu argument in get_cpuid

Thu, 07 Nov 2024 16:20:31 +0000

perf arm64 header: Use cpu argument in get_cpuidUse the cpu to read the MIDR file requested. If the "any" value (-1) ispassed that keep the behavior of returning the first MIDR file that canbe read.Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Xu Yang Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Athira Rajeev Cc: Ben Zong-You Xie Cc: Benjamin Gray Cc: Bibo Mao Cc: Clément Le Goffic Cc: Dima Kogan Cc: Dr. David Alan Gilbert Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Will Deacon Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgLink: https://lore.kernel.org/r/20241107162035.52206-5-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

cec0d657 - perf header: Refactor get_cpuid to take a CPU for ARM

Thu, 07 Nov 2024 16:20:30 +0000

perf header: Refactor get_cpuid to take a CPU for ARMARM BIG.little has no notion of a constant CPUID for both coretypes. To reflect this reality, change the get_cpuid function to alsopass in a possibly unused logical cpu.If the dummy value (-1) is passed in then ARM can, as currently happens,select the first logical CPU's "CPUID".The changes to ARM getcpuid happen in a follow up change.Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Xu Yang Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Athira Rajeev Cc: Ben Zong-You Xie Cc: Benjamin Gray Cc: Bibo Mao Cc: Clément Le Goffic Cc: Dima Kogan Cc: Dr. David Alan Gilbert Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Will Deacon Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgLink: https://lore.kernel.org/r/20241107162035.52206-4-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

c6fafe36 - perf header: Move is_cpu_online to numa bench

Thu, 07 Nov 2024 16:20:29 +0000

perf header: Move is_cpu_online to numa benchThe helper function is only used in the NUMA benchmark as typicallyonline CPUs are determined through perf_cpu_map__new_online_cpus().Reduce the scope of the function for now.Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Xu Yang Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Athira Rajeev Cc: Ben Zong-You Xie Cc: Benjamin Gray Cc: Bibo Mao Cc: Clément Le Goffic Cc: Dima Kogan Cc: Dr. David Alan Gilbert Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Will Deacon Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.orgCc: linux-riscv@lists.infradead.orgLink: https://lore.kernel.org/r/20241107162035.52206-3-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

2d57c32b - perf header: Remove repipe option

Thu, 29 Aug 2024 15:01:53 +0000

perf header: Remove repipe optionNo longer used by `perf inject` the repipe_fd is always -1 and repipeis always false. Remove the options and associated code knowing theconstant values of the removed variables.Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Terrell Cc: Peter Zijlstra Cc: Yanteng Si Cc: Yicong Yang Link: https://lore.kernel.org/r/20240829150154.37929-8-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

89d64e72 - perf inject: Overhaul handling of pipe files

Thu, 29 Aug 2024 15:01:52 +0000

perf inject: Overhaul handling of pipe filesPreviously inject->is_pipe was set if the input or output were apipe. Determining the input was a pipe had to be done prior tostarting the session and opening the file. This was done by comparingthe input file name with '-' but it fails if the pipe file is writtento disk.Opening a pipe file from disk will correctly set perf_data.is_pipe, butthis is too late for 'perf inject' and results in a broken file. Aworkaround is 'cat pipe_perf|perf inject -i - ...'.This change removes inject->is_pipe and changes the dependentconditions to use the is_pipe flag on the input(inject->session->data) and output files (inject->output). Thisensures the is_pipe condition reflects things like the header beingread.The change removes the use of perf file header repiping, that iswriting the file header out while reading it in. The case of inputpipe and output file cannot repipe as the attributes for the file areunknown. To resolve this, write the file header when writing to diskand as the attributes may be unknown, write them after the data.Update sessions repipe variable to be trace_event_repipe as those arethe only events now impacted by it. Update __perf_session__new as therepipe_fd no longer needs passing. Fully removing repipe from sessionheader reading will be done in a later change.Committer testing: root@number:~# perf record -e syscalls:sys_enter_*sleep/max-stack=4/ -o - sleep 0.01 | perf report -i - # To display the perf.data header info, please use --header/--header-only options. # [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.050 MB - ] # # Total Lost Samples: 0 # # Samples: 1 of event 'syscalls:sys_enter_clock_nanosleep' # Event count (approx.): 1 # # Overhead Command Shared Object Symbol # ........ ....... ............. ............................... # 100.00% sleep libc.so.6 [.] clock_nanosleep@GLIBC_2.2.5 | ---__libc_start_main@@GLIBC_2.34 __libc_start_call_main 0x562fc2560a9f clock_nanosleep@GLIBC_2.2.5 # # (Tip: Create an archive with symtabs to analyse on other machine: perf archive) # root@number:~# perf record -e syscalls:sys_enter_*sleep/max-stack=4/ -o - sleep 0.01 > pipe.data [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.050 MB - ] root@number:~# perf report --stdio -i pipe.data # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 0 # # Samples: 1 of event 'syscalls:sys_enter_clock_nanosleep' # Event count (approx.): 1 # # Overhead Command Shared Object Symbol # ........ ....... ............. ............................... # 100.00% sleep libc.so.6 [.] clock_nanosleep@GLIBC_2.2.5 | ---__libc_start_main@@GLIBC_2.34 __libc_start_call_main 0x55f775975a9f clock_nanosleep@GLIBC_2.2.5 # # (Tip: To set sampling period of individual events use perf record -e cpu/cpu-cycles,period=100001/,cpu/branches,period=10001/ ...) # root@number:~#Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Terrell Cc: Peter Zijlstra Cc: Yanteng Si Cc: Yicong Yang Link: https://lore.kernel.org/r/20240829150154.37929-7-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

d71bbe79 - perf header: Add kerneldoc to 'struct perf_file_header'

Thu, 29 Aug 2024 15:01:49 +0000

perf header: Add kerneldoc to 'struct perf_file_header'Some of the values are a little strange so add documentation toresolve ambiguity.Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Terrell Cc: Peter Zijlstra Cc: Yanteng Si Cc: Yicong Yang Link: https://lore.kernel.org/r/20240829150154.37929-4-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

30f29bae - perf tool: Constify tool pointers

Mon, 12 Aug 2024 20:46:55 +0000

perf tool: Constify tool pointersThe tool pointer (to a struct largely of function pointers) is passedaround but is unchanged except at initialization. Change parameter andvariable types to be const to lower the possibilities of what couldhappen with a tool.Reviewed-by: Adrian Hunter Signed-off-by: Ian Rogers Tested-by: Adrian Hunter Tested-by: Leo Yan Cc: Alexander Shishkin Cc: Anshuman Khandual Cc: Athira Rajeev Cc: Huacai Chen Cc: Ilkka Koskinen Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Jonathan Cameron Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Nick Desaulniers Cc: Nick Terrell Cc: Oliver Upton Cc: Peter Zijlstra Cc: Song Liu Cc: Sun Haiyong Cc: Suzuki Poulouse Cc: Will Deacon Cc: Yanteng Si Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.orgLink: https://lore.kernel.org/r/20240812204720.631678-4-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

2b72cec9 - perf: Extract building cache level for a CPU into separate function

Wed, 17 May 2023 17:27:41 +0000

perf: Extract building cache level for a CPU into separate functionbuild_caches() builds the complete cache topology of the system byiterating over all CPU, building and comparing cache levels of each CPU,keeping only the unique ones at the end.Extract the unit that build the cache levels for a single CPU into aseparate function. Expose this function, and the MAX_CACHE_LVL value tobe used elsewhere in perf too.Signed-off-by: K Prateek Nayak Acked-by: Ian Rogers Cc: Alexander Shishkin Cc: Ananth Narayan Cc: Gautham Shenoy Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Stephane Eranian Cc: Wen Pu Link: https://lore.kernel.org/r/20230517172745.5833-2-kprateek.nayak@amd.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

8641661c - perf header: Move perf_version_string declaration

Mon, 10 Apr 2023 16:25:08 +0000

perf header: Move perf_version_string declarationMove to match the definition in header.c.Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Rajeev Cc: Chengdong Li Cc: Denis Nikitin Cc: Florian Fischer Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Martin Liška Cc: Mathieu Poirier Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Raul Silvera Cc: Ravi Bangoria Cc: Rob Herring Cc: Sean Christopherson Cc: Suzuki Poulouse Cc: Will Deacon Cc: Xing Zhengjun Cc: coresight@lists.linaro.orgCc: linux-arm-kernel@lists.infradead.orgLink: https://lore.kernel.org/r/20230410162511.3055900-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

378ef0f5 - perf build: Use libtraceevent from the system

Mon, 05 Dec 2022 22:59:39 +0000

perf build: Use libtraceevent from the systemRemove the LIBTRACEEVENT_DYNAMIC and LIBTRACEFS_DYNAMIC make commandline variables.If libtraceevent isn't installed or NO_LIBTRACEEVENT=1 is passed to thebuild, don't compile in libtraceevent and libtracefs support.This also disables CONFIG_TRACE that controls "perf trace".CONFIG_LIBTRACEEVENT is used to control enablement in Build/Makefiles,HAVE_LIBTRACEEVENT is used in C code.Without HAVE_LIBTRACEEVENT tracepoints are disabled and as such thecommands kmem, kwork, lock, sched and timechart are removed. Themajority of commands continue to work including "perf test".Committer notes:Fixed up a tools/perf/util/Build reject and added: #include to tools/perf/util/scripting-engines/trace-event-perl.c.Committer testing: $ rpm -qi libtraceevent-devel Name : libtraceevent-devel Version : 1.5.3 Release : 2.fc36 Architecture: x86_64 Install Date: Mon 25 Jul 2022 03:20:19 PM -03 Group : Unspecified Size : 27728 License : LGPLv2+ and GPLv2+ Signature : RSA/SHA256, Fri 15 Apr 2022 02:11:58 PM -03, Key ID 999f7cbf38ab71f4 Source RPM : libtraceevent-1.5.3-2.fc36.src.rpm Build Date : Fri 15 Apr 2022 10:57:01 AM -03 Build Host : buildvm-x86-05.iad2.fedoraproject.org Packager : Fedora Project Vendor : Fedora Project URL : https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ Bug URL : https://bugz.fedoraproject.org/libtraceevent Summary : Development headers of libtraceevent Description : Development headers of libtraceevent-libs $Default build: $ ldd ~/bin/perf | grep tracee libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f1dcaf8f000) $ # perf trace -e sched:* --max-events 10 0.000 migration/0/17 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, dest_cpu: 1) 0.005 migration/0/17 sched:sched_wake_idle_without_ipi(cpu: 1) 0.011 migration/0/17 sched:sched_switch(prev_comm: "", prev_pid: 17 (migration/0), prev_state: 1, next_comm: "", next_prio: 120) 1.173 :0/0 sched:sched_wakeup(comm: "", pid: 3138 (gnome-terminal-), prio: 120) 1.180 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 3138 (gnome-terminal-), next_prio: 120) 0.156 migration/1/21 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, orig_cpu: 1, dest_cpu: 2) 0.160 migration/1/21 sched:sched_wake_idle_without_ipi(cpu: 2) 0.166 migration/1/21 sched:sched_switch(prev_comm: "", prev_pid: 21 (migration/1), prev_state: 1, next_comm: "", next_prio: 120) 1.183 :0/0 sched:sched_wakeup(comm: "", pid: 1602985 (kworker/u16:0-f), prio: 120, target_cpu: 1) 1.186 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 1602985 (kworker/u16:0-f), next_prio: 120) #Had to tweak tools/perf/util/setup.py to make sure the python bindingshared object links with libtraceevent if -DHAVE_LIBTRACEEVENT ispresent in CFLAGS.Building with NO_LIBTRACEEVENT=1 uncovered some more build failures:- Make building of data-convert-bt.c to CONFIG_LIBTRACEEVENT=y- perf-$(CONFIG_LIBTRACEEVENT) += scripts/- bpf_kwork.o needs also to be dependent on CONFIG_LIBTRACEEVENT=y- The python binding needed some fixups and util/trace-event.c can't be built and linked with the python binding shared object, so remove it in tools/perf/util/setup.py and exclude it from the list of dependencies in the python/perf.so Makefile.perf target.Building without libtraceevent-devel installed uncovered more buildfailures:- The python binding tools/perf/util/python.c was assuming that traceevent/parse-events.h was always available, which was the case when we defaulted to using the in-kernel tools/lib/traceevent/ files, now we need to enclose it under ifdef HAVE_LIBTRACEEVENT, just like the other parts of it that deal with tracepoints.- We have to ifdef the rules in the Build files with CONFIG_LIBTRACEEVENT=y to build builtin-trace.c and tools/perf/trace/beauty/ as we only ifdef setting CONFIG_TRACE=y when setting NO_LIBTRACEEVENT=1 in the make command line, not when we don't detect libtraceevent-devel installed in the system. Simplification here to avoid these two ways of disabling builtin-trace.c and not having CONFIG_TRACE=y when libtraceevent-devel isn't installed is the clean way.From Athira:tools/perf/arch/powerpc/util/Build-perf-y += kvm-stat.o+perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.oThen, ditto for arm64 and s390, detected by container cross build tests.- s/390 uses test__checkevent_tracepoint() that is now only available if HAVE_LIBTRACEEVENT is defined, enclose the callsite with ifder HAVE_LIBTRACEEVENT.Also from Athira:With this change, I could successfully compile in these environment:- Without libtraceevent-devel installed- With libtraceevent-devel installed- With “make NO_LIBTRACEEVENT=1”Then, finally rename CONFIG_TRACEEVENT to CONFIG_LIBTRACEEVENT forconsistency with other libraries detected in tools/perf/.Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Tested-by: Athira Rajeev Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Stephane Eranian Cc: bpf@vger.kernel.orgLink: http://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

37ed2cdd - perf inject: Adjust output data offset for backward compatibility

Tue, 21 Jun 2022 15:27:25 +0000

perf inject: Adjust output data offset for backward compatibilityWhen 'perf inject' creates a new file, it reuses the data offset fromthe input file. If there has been a change on the size of the header, ashappened in v5.12 -> v5.13, the new offsets will be wrong, resulting ina corrupted output file.This change adds the function perf_session__data_offset to compute thedata offset based on the current header size, and uses that instead ofthe offset from the original input file.Signed-off-by: Raul Silvera Acked-by: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Jajeev Cc: Colin Ian King Cc: Dave Marchevsky Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20220621152725.2668041-1-rsilvera@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

2139f742 - perf header: Record non-CPU PMU capabilities

Sat, 04 Jun 2022 04:45:16 +0000

perf header: Record non-CPU PMU capabilitiesPMUs advertise their capabilities via sysfs attribute files butthe perf tool currently parses only core(CPU) or hybrid core PMUcapabilities. Add support of recording non-core PMU capabilitiesint perf.data header.Note that a newly proposed HEADER_PMU_CAPS is replacing existingHEADER_HYBRID_CPU_PMU_CAPS. Special care is taken for hybrid corePMUs by writing their capabilities first in the perf.data headerto make sure new perf.data file being read by old perf tool doesnot break.Reviewed-by: Kan Liang Signed-off-by: Ravi Bangoria Acked-by: Namhyung Kim Cc: Ananth Narayan Cc: Andi Kleen Cc: Borislav Petkov Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kim Phillips Cc: Leo Yan Cc: Mark Rutland Cc: Peter Zijlstra Cc: Robert Richter Cc: Sandipan Das Cc: Santosh Shukla Cc: Stephane Eranian Cc: Thomas Gleixner Cc: like.xu.linux@gmail.comCc: x86@kernel.orgLink: https://lore.kernel.org/r/20220604044519.594-6-ravi.bangoria@amd.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

180b3d06 - perf inject: Keep some features sections from input file

Fri, 20 May 2022 13:24:02 +0000

perf inject: Keep some features sections from input fileperf inject overwrites feature sections with information from the currentmachine. It makes more sense to keep original information that describesthe machine or software when perf record was run.Example: perf.data from "Desktop" injected on "nuc11" Before: $ perf script --header-only -i perf.data-from-desktop | head -15 # ======== # captured on : Thu May 19 09:55:50 2022 # header version : 1 # data offset : 1208 # data size : 837480 # feat offset : 838688 # hostname : Desktop # os release : 5.13.0-41-generic # perf version : 5.18.rc5.gac837f7ca7ed # arch : x86_64 # nrcpus online : 28 # nrcpus avail : 28 # cpudesc : Intel(R) Core(TM) i9-9940X CPU @ 3.30GHz # cpuid : GenuineIntel,6,85,4 # total memory : 65548656 kB $ perf inject -i perf.data-from-desktop -o injected-perf.data $ perf script --header-only -i injected-perf.data | head -15 # ======== # captured on : Fri May 20 15:06:55 2022 # header version : 1 # data offset : 1208 # data size : 837480 # feat offset : 838688 # hostname : nuc11 # os release : 5.17.5-local # perf version : 5.18.rc5.g0f828fdeb9af # arch : x86_64 # nrcpus online : 8 # nrcpus avail : 8 # cpudesc : 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz # cpuid : GenuineIntel,6,140,1 # total memory : 16012124 kB After: $ perf inject -i perf.data-from-desktop -o injected-perf.data $ perf script --header-only -i injected-perf.data | head -15 # ======== # captured on : Fri May 20 15:08:54 2022 # header version : 1 # data offset : 1208 # data size : 837480 # feat offset : 838688 # hostname : Desktop # os release : 5.13.0-41-generic # perf version : 5.18.rc5.gac837f7ca7ed # arch : x86_64 # nrcpus online : 28 # nrcpus avail : 28 # cpudesc : Intel(R) Core(TM) i9-9940X CPU @ 3.30GHz # cpuid : GenuineIntel,6,85,4 # total memory : 65548656 kBSigned-off-by: Adrian Hunter Acked-by: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/r/20220520132404.25853-4-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

237c96b8 - perf header: Add ability to keep feature sections

Fri, 20 May 2022 13:24:00 +0000

perf header: Add ability to keep feature sectionsMany feature sections should not be re-written during perf inject. Inpreparation to support that, add callbacks that a tool can use to copya feature section from elsewhere. perf inject will use this facility tocopy features sections from the input file.Signed-off-by: Adrian Hunter Acked-by: Jiri Olsa Cc: Namhyung Kim Link: https://lore.kernel.org/r/20220520132404.25853-2-adrian.hunter@intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

8cb7a188 - perf bench: Fix numa testcase to check if CPU used to bind task is online

Tue, 12 Apr 2022 16:40:58 +0000

perf bench: Fix numa testcase to check if CPU used to bind task is onlinePerf numa bench test fails with error:Testcase: ./perf bench numa mem -p 2 -t 1 -P 1024 -C 0,8 -M 1,0 -s 20 -zZq --thp 1 --no-data_rand_walkFailure snippet:<<>> Running 'numa/mem' benchmark: # Running main, "perf bench numa numa-mem -p 2 -t 1 -P 1024 -C 0,8 -M 1,0 -s 20 -zZq --thp 1 --no-data_rand_walk" perf: bench/numa.c:333: bind_to_cpumask: Assertion `!(ret)' failed.<<>>The Testcases uses CPU's 0 and 8. In function "parse_setup_cpu_list",There is check to see if cpu number is greater than max cpu's possiblein the system ie via "if (bind_cpu_0 >= g->p.nr_cpus || bind_cpu_1 >=g->p.nr_cpus) {".But it could happen that system has say 48 CPU's, but only number ofonline CPU's is 0-7. Other CPU's are offlined. Since "g->p.nr_cpus" is48, so function will go ahead and set bit for CPU 8 also in cpumask (td->bind_cpumask).bind_to_cpumask function is called to set affinity usingsched_setaffinity and the cpumask. Since the CPU8 is not present, setaffinity will fail here with EINVAL.Fix this issue by adding a check to make sure that, CPU's provided inthe input argument values are online before proceeding further and skipthe test. For this, include new helper function "is_cpu_online" in"tools/perf/util/header.c".Since "BIT(x)" definition will get included from header.h, removethat from bench/numa.cReported-by: Disha Goel Signed-off-by: Athira Jajeev Tested-by: Disha Goel Cc: Ian Rogers Cc: Jiri Olsa Cc: Kajol Jain Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nageswara R Sastry Cc: Srikar Dronamraju Cc: linuxppc-dev@lists.ozlabs.orgLink: https://lore.kernel.org/r/20220412164059.42654-2-atrajeev@linux.vnet.ibm.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

0ae03893 - perf tools: Pass a fd to perf_file_header__read_pipe()

Mon, 19 Jul 2021 22:31:50 +0000

perf tools: Pass a fd to perf_file_header__read_pipe()Currently it unconditionally writes to stdout for repipe. But perfinject can direct its output to a regular file. Then it needs towrite the header to the file as well.Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Andi Kleen Cc: Ian Rogers Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210719223153.1618812-3-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

e119083b - perf header: Support HYBRID_CPU_PMU_CAPS feature

Fri, 14 May 2021 12:29:48 +0000

perf header: Support HYBRID_CPU_PMU_CAPS featurePerf has supported the CPU_PMU_CAPS feature to display a list of CPU PMUcapabilities. But on a hybrid platform, it may have several CPU PMUs (suchas "cpu_core" and "cpu_atom"). The CPU_PMU_CAPS feature is hard to extendto support multiple CPU PMUs well if it needs to be compatible for the caseof old perf data file + new perf tool.So for better compatibility we now create a new feature HYBRID_CPU_PMU_CAPSin the header.For the perf.data generated on hybrid platform, root@otcpl-adl-s-2:~# perf report --header-only -I # cpu_core pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid # cpu_atom pmu capabilities: branches=32, max_precise=3, pmu_name=alderlake_hybrid # missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CPU_PMU_CAPS CLOCK_DATAFor the perf.data generated on non-hybrid platform root@kbl-ppc:~# perf report --header-only -I # cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake # missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGY HYBRID_CPU_PMU_CAPSSigned-off-by: Jin Yao Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Kan Liang Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210514122948.9472-3-yao.jin@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

f7d74ce3 - perf header: Support HYBRID_TOPOLOGY feature

Fri, 14 May 2021 12:29:47 +0000

perf header: Support HYBRID_TOPOLOGY featureIt is useful to let the user know about the hybrid topology.Add the HYBRID_TOPOLOGY feature in header to indicate the core CPUsand the atom CPUs.With this patch a perf.data generated on a hybrid platform reportsthe hybrid CPU list: root@otcpl-adl-s-2:~# perf report --header-only -I ... # hybrid cpu system: # cpu_core cpu list : 0-15 # cpu_atom cpu list : 16-23For a perf.data generated on a non-hybrid platform, reports a messagethat HYBRID_TOPOLOGY is missing: root@kbl-ppc:~# perf report --header-only -I ... # missing features: TRACING_DATA BRANCH_STACK GROUP_DESC AUXTRACE STAT CLOCKID DIR_FORMAT COMPRESSED CLOCK_DATA HYBRID_TOPOLOGYSigned-off-by: Jin Yao Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Kan Liang Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210514122948.9472-2-yao.jin@linux.intel.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h

d1e325cf - perf header: Store clock references for -k/--clockid option

Wed, 05 Aug 2020 09:34:40 +0000

perf header: Store clock references for -k/--clockid optionAdd a new CLOCK_DATA feature that stores reference times when-k/--clockid option is specified.It contains the clock id and its reference time together with wall clocktime taken at the 'same time', both values are in nanoseconds.The format of data is as below: struct { u32 version; /* version = 1 */ u32 clockid; u64 wall_clock_ns; u64 clockid_time_ns; };This clock reference times will be used in following changes to displaywall clock for perf events.It's available only for recording with clockid specified, because it'sthe only case where we can get reference time to wallclock time. It'scan't do that with perf clock yet.Committer testing: $ perf record -h -k Usage: perf record [] [] or: perf record [] -- [] -k, --clockid clockid to use for events, see clock_gettime() $ perf record -k monotonic sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.017 MB perf.data (8 samples) ] $ perf report --header-only | grep clockid -A1 # event : name = cycles:u, , id = { 88815, 88816, 88817, 88818, 88819, 88820, 88821, 88822 }, size = 120, { 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, use_clockid = 1, ksymbol = 1, bpf_event = 1, clockid = 1 # CPU_TOPOLOGY info available, use -I to display -- # clockid frequency: 1000 MHz # cpu pmu capabilities: branches=32, max_precise=3, pmu_name=skylake # clockid: monotonic (1) # reference time: 2020-08-06 09:40:21.619290 = 1596717621.619290 (TOD) = 21931.077673635 (monotonic) $Original-patch-by: David Ahern Signed-off-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: David Ahern Cc: Geneviève Bastien Cc: Ian Rogers Cc: Jeremie Galarneau Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Wang Nan Link: http://lore.kernel.org/lkml/20200805093444.314999-4-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/util/header.h