- 16 Nov, 2017 40 commits
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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:
Arnaldo Carvalho de Melo <acme@redhat.com>
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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:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.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> Cc: Taeung Song <treeze.taeung@gmail.com> Link: http://lkml.kernel.org/r/20171114032540.4564-1-ravi.bangoria@linux.vnet.ibm.comSigned-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
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/1510449047-12941-3-git-send-email-uneedsihyeon@gmail.comSigned-off-by:
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Sihyeon Jang authored
Signed-off-by:
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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:
Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/20171109145528.23371-4-andi@firstfloor.orgSigned-off-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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Arnaldo Carvalho de Melo authored
When processing PERF_RECORD_AUXTRACE_INFO several perf_evsel entries will be synthesized and inserted into session->evlist, eventually ending in perf_script.tool.sample(), which ends up calling builtin-script.c's process_event(), that expects evsel->priv to be a perf_evsel_script object with a valid FILE pointer in fp. So we need to intercept the processing of PERF_RECORD_AUXTRACE_INFO and then setup evsel->priv for these newly created perf_evsel instances, do it to fix the segfault in process_event() trying to use a NULL for that FILE pointer. Reported-by:
Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Adrian Hunter <adrian.hunter@intel.com> 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: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Cc: yuzhoujian <yuzhoujian@didichuxing.com> Fixes: a14390fd ("perf script: Allow creating per-event dump files") Link: http://lkml.kernel.org/n/tip-bthnur8r8de01gxvn2qayx6e@git.kernel.org [ Merge fix by Ravi Bangoria before pushing upstream to preserv bisectability ] Signed-off-by:
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Seonghyun Park authored
Include newly added fields 'mmap2', 'comm_exec', 'use_clockid', 'namespaces', 'write_backward' and 'context_switch' from perf_event_attr to store_event(). Signed-off-by:
Seonghyun Park <seonghyun0p@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Seonghyun Park <seonghyun0p@gmail.com> Link: http://lkml.kernel.org/n/tip-vltn7pqhcv8h5fmo9cthk87q@git.kernel.org [ Fix log message to add 'write_backward', fix the patch to add 'use_clock_id' ] Signed-off-by:
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Arnaldo Carvalho de Melo authored
I forgot one conversion, which got noticed by Thomas when running: $ perf stat -e '{cpu-clock,instructions}' kill kill: not enough arguments Segmentation fault (core dumped) $ Fix it, those stats are in evsel->stats, not anymore in evsel->priv. Reported-by: -
Jiri Olsa authored
Using the shell function for perl CFLAGS retrieval instead of back quotes (``). Both execute shell with the command, but the latter is more explicit and seems to be the preferred way. Also we don't have any other use of the back quotes in perf Makefiles. Signed-off-by:
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Andrei Vagin authored
Currently if trace_event__register_resolver() fails, we return -errno, but we can't be sure that errno isn't zero in this case. Signed-off-by:
Andrei Vagin <avagin@openvz.org> Reviewed-by:
Jiri Olsa <jolsa@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Vasily Averin <vvs@virtuozzo.com> Link: http://lkml.kernel.org/r/20171108002246.8924-2-avagin@openvz.orgSigned-off-by:
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Andi Kleen authored
Use a typed enum for the perf_evsel_config_term type enum. This allows gcc to do much stronger type checks, and also check for missing case statements. I removed the unused _MAX member from the number. It found one missing case. I'm not sure it's a real problem, so I just turned it into a BUG_ON for now. Signed-off-by:
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Andi Kleen authored
The Intel PMU event aliases have a implicit period= specifier to set the default period. Unfortunately this breaks overriding these periods with -c or -F, because the alias terms look like they are user specified to the internal parser, and user specified event qualifiers override the command line options. Track that they are coming from aliases by adding a "weak" state to the term. Any weak terms don't override command line options. I only did it for -c/-F for now, I think that's the only case that's broken currently. Before: $ perf record -c 1000 -vv -e uops_issued.any ... { sample_period, sample_freq } 2000003 After: $ perf record -c 1000 -vv -e uops_issued.any ... { sample_period, sample_freq } 1000 Signed-off-by: -
Arnaldo Carvalho de Melo authored
Two more, that were just in perf/core and thus weren't covered by Ingo's latest headers synch, kcmp.h and prctl.h, silencing this: Warning: Kernel ABI header at 'tools/include/uapi/linux/kcmp.h' differs from latest version at 'include/uapi/linux/kcmp.h' Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h' Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-2a0r7iybyqpkftllyy5t9hfk@git.kernel.orgSigned-off-by:
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Jiri Olsa authored
Align source with offset lines, which are more advanced, because of the address column. Before: : static void *worker_thread(void *__tdata) : { 0.00 : 48a971: push %rbp 0.00 : 48a972: mov %rsp,%rbp 0.00 : 48a975: sub $0x30,%rsp 0.00 : 48a979: mov %rdi,-0x28(%rbp) 0.00 : 48a97d: mov %fs:0x28,%rax 0.00 : 48a986: mov %rax,-0x8(%rbp) 0.00 : 48a98a: xor %eax,%eax : struct thread_data *td = __tdata; 0.00 : 48a98c: mov -0x28(%rbp),%rax 0.00 : 48a990: mov %rax,-0x10(%rbp) : int m = 0, i; 0.00 : 48a994: movl $0x0,-0x1c(%rbp) : int ret; : : for (i = 0; i < loops; i++) { 0.00 : 48a99b: movl $0x0,-0x18(%rbp) After: : static void *worker_thread(void *__tdata) : { 0.00 : 48a971: push %rbp 0.00 : 48a972: mov %rsp,%rbp 0.00 : 48a975: sub $0x30,%rsp 0.00 : 48a979: mov %rdi,-0x28(%rbp) 0.00 : 48a97d: mov %fs:0x28,%rax 0.00 : 48a986: mov %rax,-0x8(%rbp) 0.00 : 48a98a: xor %eax,%eax : struct thread_data *td = __tdata; 0.00 : 48a98c: mov -0x28(%rbp),%rax 0.00 : 48a990: mov %rax,-0x10(%rbp) : int m = 0, i; 0.00 : 48a994: movl $0x0,-0x1c(%rbp) : int ret; : : for (i = 0; i < loops; i++) { 0.00 : 48a99b: movl $0x0,-0x18(%rbp) It makes bigger different when displaying script sources, where the comment lines looks oddly shifted from the lines which actually hold code. I'll send script support separately. Committer note: Do not use a fixed column width for the addresses, as kernel ones se more than 10 columns, look at the last offset and get the right width. Signed-off-by: -
Jiri Olsa authored
Factor disasm_line__write function from annotate_browser__write, which now keeps only generic display code. Signed-off-by:
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Jiri Olsa authored
Use struct annotation_line in browser::b::top. Signed-off-by:
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Jiri Olsa authored
Use struct annotation_line in find functions: annotate_browser__find_string annotate_browser__find_string_reverse Signed-off-by:
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Jiri Olsa authored
Using struct annotation_line arg in browser_line function to make it generic. Signed-off-by:
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Jiri Olsa authored
Use struct annotation_line as a browser::offsets array entry. Signed-off-by:
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Jiri Olsa authored
Use struct annotation_line as a browser::selection. We want to be able to use the annotate_browser for all sorts of source data, so it needs to be able to work over the generic struct annotation_line. Signed-off-by:
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Jiri Olsa authored
Rename disasm_line__browser function to browser_line, because the browser got generic and is no longer disasm specific. Signed-off-by:
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Jiri Olsa authored
Rename struct browser_disasm_line to browser_line, because the browser operates now on generic lines and no longer on disasm lines. Signed-off-by:
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Jiri Olsa authored
We now keep samples_nr in struct annotation_line, so there's no need to pass nr_events to disasm_rb_tree__insert function. Signed-off-by:
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Jiri Olsa authored
We now carry the data in 'struct annotation_line', so using it instead of samples from 'struct browser_disasm_line' and removing it and its setup. Signed-off-by:
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