- 18 Nov, 2017 1 commit
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-4.15-20171117' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: - Optimize sample parsing for ordering events, where we don't need to parse all the PERF_SAMPLE_ bits, just the ones leading to the timestamp needed to reorder events (Jiri Olsa) - Use a dummy event to ask for PERF_RECORD_{MMAP,COMM,EXEC} with 'perf record --delay', when the events asked by the user will only be enabled after the workload is started and the requested delay passes, so we need to add the dummy event and have it .enabled_on_exec. This then allows us to resolve symbols for the DSO executable MMAPs setup while we wait for the delay (Arnaldo Carvalho de Melo) - Synchronize kcmp.h and prctl.h ABI headers wrt SPDX tags (Arnaldo Carvalho de Melo) - Generalize the annotation code to support other source information besides objdump/DWARF obtained ones, starting with python scripts, that will is slated to be merged soon (Jiri Olsa) - Advance the source code lines to right after the column with the address in asm lines (Jiri Olsa) - Fix terminal dimensions resizing signal handling in 'perf top --stdio' (Jiri Olsa) - Improve error messages for PMU events (Kim Phillips) - Fix 'perf record' -c/-F options for cpu event aliases (Andi Kleen) - Enable type checking for perf_evsel_config_term types (Andi Kleen) - Call machine__exit() at 'perf trace' exit, so as to remove temporary files related to VDSO (Andrei Vagin) - Add "reject" option to parse-events.l, fixing the build with newer flex releases. Noticed with flex 2.6.4 on Alpine Linux 3.6 and Edge (Jiri Olsa) - Document some missing perf.data headers (Andi Kleen) - Allow printing period for non freq mod groups (Andi Kleen) - Do not warn the user about kernel.kptr_restrict when not sampling the kernel (Arnaldo Carvalho de Melo) - Fix bug in 'perf help' introduced during conversion to strstart() (Namhyung Kim) - Do not truncate ASM instruction mnemonics at 6 characters in the annotation output, PowerPC has long ones (Ravi Bangoria) - Document some missing command line options (Sihyeon Jang) - Update POWER9 vendor event tables (Sukadev Bhattiprolu) - Fix 'perf test' shell entries on s390x, where the 'openat' syscall is used instead of 'open' in one of the tests and - No need to use overwrite mmap mode in 'perf test', those tests do not generate massive amount of events to fill the ring buffer (Wang Nan) - Add missing command line options (mostly --force/-f) to the man pages (Sihyeon Jang) Signed-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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- 17 Nov, 2017 7 commits
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Jiri Olsa authored
We need to call symbol__calc_percent() periodicaly for top, so it's no longer convenient to keep it in symbol__disassemble(). Let's separate the symbol__disassemble() to allocate and init the symbol annotation structs and symbol__calc_percent() to compute the lines percentages based on symbol hists data. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-gtnp8t4tb00q6lag07psn5nq@git.kernel.orgSigned-off-by:
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Jiri Olsa authored
There's no need for symbol__calc_percent and annotation__calc_percent functions to return any value, since it's always zero. Changing both function to return void. Signed-off-by:
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Jiri Olsa authored
Ravi reported crash in perf top --stdio when annotating a function [1]. The issue was, that we don't pass evsel pointer into symbol__annotate() function, which got over looked in the last annotation changes. [1] https://marc.info/?l=linux-kernel&m=151060884412702&w=2 Committer note: This fixes the crash, but makes it stumble into another bug, double locking the annotation data structures, that is in turn fixed by the next patch in this series. Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Tested-by:
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Jiri Olsa authored
There's no need for SA_SIGINFO data in SIGWINCH handler, switching it to register the handler via signal interface as we do for the rest of the signals in perf top. Signed-off-by:
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Jiri Olsa authored
The stdio perf top crashes when we change the terminal window size. The reason is that we assumed we get the perf_top pointer as a signal handler argument which is not the case. Changing the SIGWINCH handler logic to change global resize variable, which is checked in the main thread loop. Signed-off-by:
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Jiri Olsa authored
Currently when using ordered events we parse the sample twice (the perf_evlist__parse_sample function). Once before we queue the sample for sorting: perf_session__process_event perf_evlist__parse_sample(sample) perf_session__queue_event(sample.time) And then when we deliver the sorted sample: ordered_events__deliver_event perf_evlist__parse_sample perf_session__deliver_event We can skip the initial full sample parsing by using perf_evlist__parse_sample_timestamp function, which got introduced earlier. The new path looks like: perf_session__process_event perf_evlist__parse_sample_timestamp perf_session__queue_event ordered_events__deliver_event perf_session__deliver_event perf_evlist__parse_sample It saves some instructions and is slightly faster: Before: Performance counter stats for './perf.old report --stdio' (5 runs): 64,396,007,225 cycles:u ( +- 0.97% ) 105,882,112,735 instructions:u # 1.64 insn per cycle ( +- 0.00% ) 21.618103465 seconds time elapsed ( +- 1.12% ) After: Performance counter stats for './perf report --stdio' (5 runs): 60,567,807,182 cycles:u ( +- 0.40% ) 104,853,333,514 instructions:u # 1.73 insn per cycle ( +- 0.00% ) 20.168895243 seconds time elapsed ( +- 0.32% ) Signed-off-by: -
Jiri Olsa authored
There's no need to pass whole sample data, because it's only timestamp that is used. Signed-off-by:
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- 16 Nov, 2017 32 commits
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Jiri Olsa authored
Add perf_evlist__parse_sample_timestamp to retrieve the timestamp of the sample. The idea is to use this function instead of the full sample parsing before we queue the sample. At that time only the timestamp is needed and we parse the sample once again later on delivery. Signed-off-by:
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Jiri Olsa authored
Move the initialization bits into common place at the beginning of the function. Also removing some superfluous zero initialization for addr and transaction, because we zero all the data at the top. Signed-off-by:
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Jiri Olsa authored
We already pass cursor into thread__resolve_callchain function, so there's no point in resetting the global instance. Signed-off-by:
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Sihyeon Jang authored
Add --force 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/1510842367-11011-6-git-send-email-uneedsihyeon@gmail.comSigned-off-by:
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Sihyeon Jang authored
Add --force to the man page. Signed-off-by:
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Sihyeon Jang authored
Add --force to the man page. Signed-off-by:
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Sihyeon Jang authored
Add --force to the man page. Signed-off-by:
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Sihyeon Jang authored
Add missing --force option to the man page. Signed-off-by:
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Sihyeon Jang authored
Add the missing --force option to the man page. Signed-off-by:
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Jiri Olsa authored
Reset header size for namespace events, otherwise it only gets bigger in ctx iterations. Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Fixes: e4222673 ("perf: Add PERF_RECORD_NAMESPACES to include namespaces related info") Link: http://lkml.kernel.org/n/tip-nlo4gonz9d4guyb8153ukzt0@git.kernel.orgSigned-off-by:
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Sihyeon Jang authored
Add man page entry for --force. Signed-off-by:
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Kim Phillips authored
Help identify to the user the event with the unsupported sampling error. Also suggest a corrective action. BEFORE: $ sudo ./oldperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true Error: PMU Hardware doesn't support sampling/overflow-interrupts. AFTER: $ sudo ./newperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true Error: ccn/cycles/: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat' Signed-off-by:
Kim Phillips <kim.phillips@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20171114150452.e846f2e23684c7d7d8ee706f@arm.comSigned-off-by:
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Kim Phillips authored
Togle -> Toggle, lenght -> length. Signed-off-by:
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Arnaldo Carvalho de Melo authored
If all events have attr.exclude_kernel set, no need to look at kptr_restrict. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-yegpzg5bf2im69g0tfizqaqz@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
If we're not sampling the kernel, we shouldn't care about kptr_restrict neither synthesize anything for assisting in resolving kernel samples, like the reference relocation symbol or kernel modules information. Before: $ cat /proc/sys/kernel/kptr_restrict /proc/sys/kernel/perf_event_paranoid 2 2 $ perf record sleep 1 WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted, check /proc/sys/kernel/kptr_restrict. Samples in kernel functions may not be resolved if a suitable vmlinux file is not found in the buildid cache or in the vmlinux path. Samples in kernel modules won't be resolved at all. If some relocation was applied (e.g. kexec) symbols may be misresolved even with a suitable vmlinux or kallsyms file. Couldn't record kernel reference relocation symbol Symbol resolution may be skewed if relocation was used (e.g. kexec). Check /proc/kallsyms permission or run as root. [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ] $ perf evlist -v cycles:uppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, 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 $ After: $ perf record sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.001 MB perf.data (10 samples) ] $ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-t025e9zftbx2b8cq2w01g5e5@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
If none of the evsels has attr.exclude_kernel set to zero, no kernel samples, so no point in warning the user about problems in processing kernel samples, as there will be none. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-7dn926v3at8txxkky92aesz2@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
The warning about kptr_restrict needs to be emitted only when it is set and we ask for kernel space samples, so add a helper to help with that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-fh7drty6yljei9gxxzer6eup@git.kernel.orgSigned-off-by:
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Thomas Richter authored
The 'perf test' case "probe libc's inet_pton & backtrace it with ping" fails on s390x. The reason is the 'realpath /lib64/ld*.so.* | uniq' line which returns 2 libraries: root@s35lp76 shell]# realpath /lib64/ld*.so.* | uniq /usr/lib64/ld-2.26.so /usr/lib64/ld_pre_smc.so.1.0.1 [root@s35lp76 shell] This output makes the "perf probe" command lines invalid. Use ldd tool to find out the libraries required by "bash" and check if symbol "inet_pton" is part of the "libc" library. Some distros do not have a /lib64 directory. I have also added a check for the existence of an IPv6 network interface before it is being used. Committer changes: We can't really use ldd for libc, as in some systems, such as x86_64, it has hardlinks and then ldd sees one and the kernel the other, so grep for libc in /proc/self/maps to get the one we'll receive from PERF_RECORD_MMAP. Thomas checked this change and acked it. Signed-off-by:Thomas-Mich Richter <tmricht@linux.vnet.ibm.com> Tested-by:
Hendrik Brückner <brueckner@linux.vnet.ibm.com> Reviewed-by:
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Thomas Richter authored
This 'perf test' case fails on s390x. The 'touch' command on s390x uses the 'openat' system call to open the file named on the command line: [root@s35lp76 perf]# perf probe -l probe:vfs_getname (on getname_flags:72@fs/namei.c with pathname) [root@s35lp76 perf]# perf trace -e open touch /tmp/abc 0.400 ( 0.015 ms): touch/27542 open(filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 [root@s35lp76 perf]# There is no 'open' system call for file '/tmp/abc'. Instead the 'openat' system call is used: [root@s35lp76 perf]# strace touch /tmp/abc execve("/usr/bin/touch", ["touch", "/tmp/abc"], 0x3ffd547ec98 /* 30 vars */) = 0 [...] openat(AT_FDCWD, "/tmp/abc", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, 0666) = 3 [...] On s390x the 'egrep' command does not find a matching pattern and returns an error. Fix this for s390x create a platform dependent command line to enable the 'perf probe' call to listen to the 'openat' system call and get the expected output. Signed-off-by: -
Ravi Bangoria authored
There are many instructions, esp on PowerPC, whose mnemonics are longer than 6 characters. Using precision limit causes truncation of such mnemonics. Fix this by removing precision limit. Note that, 'width' is still 6, so alignment won't get affected for length <= 6. Before: li r11,-1 xscvdp vs1,vs1 add. r10,r10,r11 After: li r11,-1 xscvdpsxds vs1,vs1 add. r10,r10,r11 Reported-by:
Donald Stence <dstence@us.ibm.com> Signed-off-by:
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Namhyung Kim authored
The commit 8e99b6d4 changed prefixcmp() to strstart() but missed to change the return value in some place. It makes perf help print annoying output even for sane config items like below: $ perf help '.root': unsupported man viewer sub key. ... Reported-by:
Namhyung Kim <namhyung@kernel.org> Tested-by:
Taeung Song <treeze.taeung@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Sihyeon Jang <uneedsihyeon@gmail.com> Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20171114001542.GA16464@sejong Fixes: 8e99b6d4 ("tools include: Adopt strstarts() from the kernel") Signed-off-by:
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Arnaldo Carvalho de Melo authored
A recent fix for 'perf trace' introduced a bug where machine__exit(trace->host) could be called while trace->host was still NULL, so make this more robust by guarding against NULL, just like free() does. The problem happens, for instance, when !root users try to run 'perf trace': [acme@jouet linux]$ trace Error: No permissions to read /sys/kernel/debug/tracing/events/raw_syscalls/sys_(enter|exit) Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing' perf: Segmentation fault Obtained 7 stack frames. [0x4f1b2e] /lib64/libc.so.6(+0x3671f) [0x7f43a1dd971f] [0x4f3fec] [0x47468b] [0x42a2db] /lib64/libc.so.6(__libc_start_main+0xe9) [0x7f43a1dc3509] [0x42a6c9] Segmentation fault (core dumped) [acme@jouet linux]$ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrei Vagin <avagin@openvz.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vasily Averin <vvs@virtuozzo.com> Cc: Wang Nan <wangnan0@huawei.com> Fixes: 33974a41 ("perf trace: Call machine__exit() at exit") Signed-off-by:
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Wang Nan authored
Changing ringbuffer to !overwrite in this task is harmless because this test uses a very low frequency (1) and using a very simple program (true). There should have only 3 events in the whole test. Overwriting is impossible to happen. Signed-off-by:
Wang Nan <wangnan0@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/20171113013809.212417-6-wangnan0@huawei.comSigned-off-by:
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Wang Nan authored
In this test, a large ring buffer is required so all events can feed into, so overwrite or not is meaningless. Change to !overwrite so following commits can remove this argument. Signed-off-by:
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Wang Nan authored
Unsetting overwrite when calling perf_evlist__mmap is harmless. This commit passes false to it, makes following commits eliminate the overwrite argument easier. Signed-off-by:
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Wang Nan authored
Setting overwrite in perf_evlist__mmap() is meaningless because the event in this evlist is already have 'overwrite' postfix and goes to backward ring buffer automatically. Pass 'false' to perf_evlist__mmap() to make it similar to others. Signed-off-by:
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Sihyeon Jang authored
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Sihyeon Jang authored
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Andi Kleen authored
When using leader sampling the values of the not sampled but counted events are shown by perf script in "period". Currently printing period is only allowed when the main event has a period, that is it is in frequency mode. This implies that we cannot dump the values of counted events when the leader event is not in frequency mode. Just remove the check that the period must be set on all events. It will just be printed as 0 instead if it's not available. This fixes the following: $ perf record -c 100000 -e '{cycles,branches}:S' $ perf script -F event,period Further commentary by Jiri Olsa: The period will be the value of configured period, not 0: int perf_evsel__parse_sample(struct ... ... data->period = evsel->attr.sample_period; $ perf record -c 100000 $ perf script -F event,period | head -3 Failed to open /tmp/perf-2048.map, continuing without symbols 100000 cycles:ppp: 100000 cycles:ppp: other than that I think we can remove that check, because we will have always sane number in period Signed-off-by:Andi Kleen <ak@linux.intel.com> Acked-by:
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Andi Kleen authored
Document STAT and CACHE header entries. Signed-off-by:
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Thomas-Mich Richter authored
Clarify the perf buildid-cache help text for the purge operation. The purge subcommand takes a list of files (binaries) as option parameter. Make the wording the same as for the add and remove operation. Signed-off-by:
Masami Hiramatsu <mhiramat@kernel.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> LPU-Reference: 20171107144853.12925-1-tmricht@linux.vnet.ibm.com Signed-off-by:
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Sukadev Bhattiprolu authored
The POWER9 hardware has dropped support for several events, added a few new events and changed the category for a couple of events. Update the POWER9 events in Linux to reflect these changes. Signed-off-by:
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20171108201938.GA10985@us.ibm.comSigned-off-by:
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