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fd941521 |
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23-Sep-2022 |
Namhyung Kim <namhyung@kernel.org> |
perf inject: Clarify build-id options a little bit Update the documentation of --build-id and --buildid-all options to clarify the difference between them. The former requires full sample processing to find which DSOs are actually used. While the latter simply injects every DSO's build-id from MMAP{,2} records, skipping SAMPLEs. Reviewed-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: https://lore.kernel.org/r/20220923173142.805896-3-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
8012243e |
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15-Aug-2022 |
Raul Silvera <rsilvera@google.com> |
perf inject: Add a command line option to specify build ids. This commit adds the option --known-build-ids to perf inject. It allows the user to explicitly specify the build id for a given path, instead of retrieving it from the current system. This is useful in cases where a perf.data file is processed on a different system from where it was collected, or if some of the binaries are no longer available. The build ids and paths are specified in pairs in the command line. Using the file:// specifier, build ids can be loaded from a file directly generated by perf buildid-list. This is convenient to copy build ids from one perf.data file to another. ** Example: In this example we use perf record to create two perf.data files, one with build ids and another without, and use perf buildid-list and perf inject to copy the build ids from the first file to the second. $ perf record ls /tmp $ perf record --no-buildid -o perf.data.no-buildid ls /tmp $ perf buildid-list > build-ids.txt $ perf inject -b --known-build-ids='file://build-ids.txt' \ -i perf.data.no-buildid -o perf.data.buildid Signed-off-by: Raul Silvera <rsilvera@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20220815225922.2118745-1-rsilvera@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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53e76d35 |
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11-Aug-2022 |
Adrian Hunter <adrian.hunter@intel.com> |
perf tools: Tidy guest option documentation Move common guest options into include files. Use attribute substitution to customize an example, using "[verse]" to define the block instead of a "literal" block which does not permit substitution. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20220811170411.84154-4-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
d9ca43c0 |
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11-Aug-2022 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Fix missing guestmount option documentation The 'perf inject' documentation is missing the guestmount option. Add it. Fixes: 97406a7e4fa6e5ca ("perf inject: Add support for injecting guest sideband events") Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20220811170411.84154-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
97406a7e |
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10-Jul-2022 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Add support for injecting guest sideband events Inject events from a perf.data file recorded in a virtual machine into a perf.data file recorded on the host at the same time. Only side band events (e.g. mmap, comm, fork, exit etc) and build IDs are injected. Additionally, the guest kcore_dir is copied as kcore_dir__ appended to the machine PID. This is non-trivial because: o It is not possible to process 2 sessions simultaneously so instead events are first written to a temporary file. o To avoid conflict, guest sample IDs are replaced with new unused sample IDs. o Guest event's CPU is changed to be the host CPU because it is more useful for reporting and analysis. o Sample ID is mapped to machine PID which is recorded with VCPU in the id index. This is important to allow guest events to be related to the guest machine and VCPU. o Timestamps must be converted. o Events are inserted to obey finished-round ordering. The anticipated use-case is: - start recording sideband events in a guest machine - start recording an AUX area trace on the host which can trace also the guest (e.g. Intel PT) - run test case on the guest - stop recording on the host - stop recording on the guest - copy the guest perf.data file to the host - inject the guest perf.data file sideband events into the host perf.data file using perf inject - the resulting perf.data file can now be used Subsequent patches provide Intel PT support for this. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: kvm@vger.kernel.org Link: https://lore.kernel.org/r/20220711093218.10967-25-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
b3a018fc |
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18-Oct-2021 |
James Clark <james.clark@arm.com> |
perf inject: Add vmlinux and ignore-vmlinux arguments Other perf tools allow specifying the path to vmlinux. 'perf inject' didn't have this argument which made some auxtrace workflows difficult. Also add --ignore-vmlinux for consistency with other tools. Suggested-by: Denis Nikitin <denik@chromium.org> Signed-off-by: James Clark <james.clark@arm.com> Tested-by: Denis Nikitin <denik@chromium.org> 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> Link: https://lore.kernel.org/r/20211018134844.2627174-4-james.clark@arm.com [ Added the perf-inject man page entries for these options, as noted by Denis ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
83d7f5f1 |
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30-Apr-2021 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Add --vm-time-correlation option Intel PT timestamps are affected by virtualization. Add a new option that will allow the Intel PT decoder to correlate the timestamps and translate the virtual machine timestamps to host timestamps. The advantages of making this a separate step, rather than a part of normal decoding are that it is simpler to implement, and it needs to be done only once. This patch adds only the option. Later patches add Intel PT support. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: https://lore.kernel.org/r/20210430070309.17624-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
27c9c342 |
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12-Oct-2020 |
Namhyung Kim <namhyung@kernel.org> |
perf inject: Add --buildid-all option Like 'perf record', we can even more speedup build-id processing by just using all DSOs. Then we don't need to look at all the sample events anymore. The following patch will update 'perf bench' to show the result of the --buildid-all option too. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Original-patch-by: Stephane Eranian <eranian@google.com> Acked-by: Ian Rogers <irogers@google.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Link: https://lore.kernel.org/r/20201012070214.2074921-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
870d325b |
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11-Mar-2020 |
Adrian Hunter <adrian.hunter@intel.com> |
perf intel-pt: Add Intel PT man page references Add references to Intel PT man page in man pages of associated tools. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lore.kernel.org/lkml/20200311122034.3697-3-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
52186b8a |
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16-Nov-2017 |
Sihyeon Jang <uneedsihyeon@gmail.com> |
perf inject: Document missing options Add the missing --force option to the man page. Signed-off-by: Sihyeon Jang <uneedsihyeon@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1510842367-11011-1-git-send-email-uneedsihyeon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
9b07e27f |
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30-Nov-2015 |
Stephane Eranian <eranian@google.com> |
perf inject: Add jitdump mmap injection support This patch adds a --jit/-j option to perf inject. This options injects MMAP records into the perf.data file to cover the jitted code mmaps. It also emits ELF images for each function in the jidump file. Those images are created where the jitdump file is. The MMAP records point to that location as well. Typical flow: $ perf record -k mono -- java -agentpath:libpjvmti.so java_class $ perf inject --jit -i perf.data -o perf.data.jitted $ perf report -i perf.data.jitted Note that jitdump.h support is not limited to Java, it works with any jitted environment modified to emit the jitdump file format, include those where code can be jitted multiple times and moved around. The jitdump.h format is adapted from the Oprofile project. The genelf.c (ELF binary generation) depends on MD5 hash encoding for the buildid. To enable this, libssl-dev must be installed. If not, then genelf.c defaults to using urandom to generate the buildid, which is not ideal. The Makefile auto-detects the presence on libssl-dev. This version mmaps the jitdump file to create a marker MMAP record in the perf.data file. The marker is used to detect jitdump and cause perf inject to inject the jitted mmaps and generate ELF images for jitted functions. In V8, the following fixes and changes were made among other things: - the jidump header format include a new flags field to be used to carry information about the configuration of the runtime agent. Contributed by: Adrian Hunter <adrian.hunter@intel.com> - Fix mmap pgoff: MMAP event pgoff must be the offset within the ELF file at which the code resides. Contributed by: Adrian Hunter <adrian.hunter@intel.com> - Fix ELF virtual addresses: perf tools expect the ELF virtual addresses of dynamic objects to match the file offset. Contributed by: Adrian Hunter <adrian.hunter@intel.com> - JIT MMAP injection does not obey finished_round semantics. JIT MMAP injection injects all MMAP events in one go, so it does not obey finished_round semantics, so drop the finished_round events from the output perf.data file. Contributed by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Stephane Eranian <eranian@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Carl Love <cel@us.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John McCutchan <johnmccutchan@google.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sonny Rao <sonnyrao@chromium.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1448874143-7269-3-git-send-email-eranian@google.com [ Moved inject.build_ids ordering bits to a separate patch, fixed the NO_LIBELF=1 build ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
f56fb986 |
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25-Sep-2015 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Add --strip option to strip out non-synthesized events Add a new option --strip which is used with --itrace to strip out non-synthesized events. This results in a perf.data file that is simpler for external tools to parse. In particular, this can be used to prepare a perf.data file for consumption by autofdo. A subsequent patch makes a change to Intel PT also to enable use with autofdo and gives an example of that use. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1443186956-18718-25-git-send-email-adrian.hunter@intel.com [ Made it use perf_evlist__remove() + perf_evsel__delete() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
60b88d87 |
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17-Jul-2015 |
Adrian Hunter <adrian.hunter@intel.com> |
perf tools: Put itrace options into an asciidoc include perf script, report and inject all have the same itrace options. Put them into an asciidoc include file. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1437150840-31811-10-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
53c76b0e |
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30-Apr-2015 |
Adrian Hunter <adrian.hunter@intel.com> |
perf auxtrace: Add option to synthesize events for transactions Add AUX area tracing option 'x' to synthesize events for transactions. This will be used by Intel PT to synthesize an event record for each TSX start, commit or abort. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1430404667-10593-6-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
0f0aa5e0 |
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09-Apr-2015 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Add Instruction Tracing support Add support for decoding an AUX area assuming it contains instruction tracing data. The AUX area tracing events are stripped and replaced by synthesized events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1428594864-29309-21-git-send-email-adrian.hunter@intel.com [ Do not use -Z as an alternative to --itrace ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
a7a2b8b4 |
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22-Jul-2014 |
Adrian Hunter <adrian.hunter@intel.com> |
perf inject: Add --kallsyms parameter Let perf inject take --kallsyms parameter the same as perf script and perf report do. That is needed for decoding Instruction Trace data using a copy of /proc/kcore for the kernel object because the kallsyms path is used to locate that copy. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1406035081-14301-30-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
26a031e1 |
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07-Aug-2012 |
Andrew Vagin <avagin@openvz.org> |
perf inject: Merge sched_stat_* and sched_switch events You may want to know where and how long a task is sleeping. A callchain may be found in sched_switch and a time slice in stat_iowait, so I add handler in perf inject for merging this events. My code saves sched_switch event for each process and when it meets stat_iowait, it reports the sched_switch event, because this event contains a correct callchain. By another words it replaces all stat_iowait events on proper sched_switch events. I use the next sequence of commands for testing: perf record -e sched:sched_stat_sleep -e sched:sched_switch \ -e sched:sched_process_exit -g -o ~/perf.data.raw \ ~/test-program perf inject -v -s -i ~/perf.data.raw -o ~/perf.data perf report --stdio -i ~/perf.data 100.00% foo [kernel.kallsyms] [k] __schedule | --- __schedule schedule | |--79.75%-- schedule_hrtimeout_range_clock | schedule_hrtimeout_range | poll_schedule_timeout | do_select | core_sys_select | sys_select | system_call_fastpath | __select | __libc_start_main | --20.25%-- do_nanosleep hrtimer_nanosleep sys_nanosleep system_call_fastpath __GI___libc_nanosleep __libc_start_main And here is test-program.c: #include<unistd.h> #include<time.h> #include<sys/select.h> int main() { struct timespec ts1; struct timeval tv1; int i; long s; for (i = 0; i < 10; i++) { ts1.tv_sec = 0; ts1.tv_nsec = 10000000; nanosleep(&ts1, NULL); tv1.tv_sec = 0; tv1.tv_usec = 40000; select(0, NULL, NULL, NULL,&tv1); } return 1; } Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1344344165-369636-4-git-send-email-avagin@openvz.org [ committer note: Made it use evsel->handler ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
e558a5bd |
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07-Aug-2012 |
Andrew Vagin <avagin@openvz.org> |
perf inject: Work with files Before this patch "perf inject" can only handle data from pipe. I want to use "perf inject" for reworking events. Look at my following patch. v2: add information about new options in tools/perf/Documentation/ Signed-off-by: Andrew Vagin <avagin@openvz.org> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1344344165-369636-2-git-send-email-avagin@openvz.org [ committer note: fixed it up to cope with 5852a44, 5ded57a, 002439e & f62d3f0 ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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#
11d232ec |
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04-May-2010 |
Arnaldo Carvalho de Melo <acme@redhat.com> |
perf inject: Add missing bits New commands need to have Documentation and be added to command-list.txt so that they can appear when 'perf' is called withouth any subcommand: [root@doppio linux-2.6-tip]# perf usage: perf [--version] [--help] 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 buildid-cache Manage build-id cache. buildid-list List the buildids in a perf.data file diff Read two perf.data files and display the differential profile inject Filter to augment the events stream with additional information kmem Tool to trace/measure kernel memory(slab) properties kvm Tool to trace/measure kvm guest os list List all symbolic event types lock Analyze lock events probe Define new dynamic tracepoints record Run a command and record its profile into perf.data report Read perf.data (created by perf record) and display the profile sched Tool to trace/measure scheduler properties (latencies) stat Run a command and gather performance counter statistics test Runs sanity tests. timechart Tool to visualize total system behavior during a workload top System profiling tool. trace Read perf.data (created by perf record) and display trace output See 'perf help COMMAND' for more information on a specific command. [root@doppio linux-2.6-tip]# The new 'perf inject' command hadn't so it wasn't appearing on that list. Also fix the long option, that should have no spaces in it, rename the faulty one to be '--build-ids', instead of '--inject build-ids'. Reported-by: Ingo Molnar <mingo@elte.hu> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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