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2016-05-05perf hists: Move sort__need_collapse into struct perf_hpp_listJiri Olsa
Now we have sort dimensions private for struct hists, we need to make dimension booleans hists specific as well. Moving sort__need_collapse into struct perf_hpp_list. Adding hists__has macro to easily access this info perf struct hists object. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1462276488-26683-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf tools powerpc: Add support for generating bpf prologueNaveen N. Rao
Generalize existing macros to serve the purpose. Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Ian Munsie <imunsie@au1.ibm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Wang Nan <wangnan0@huawei.com> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1462461799-17518-1-git-send-email-naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf trace: Do not show the runtime_ms for a thread when not collecting itArnaldo Carvalho de Melo
That field is only updated when we use the "sched:sched_stat_runtime" tracepoint, and that is only done so far when we use the '--stat' command line option, without it we get just zeros, confusing the users: Without this patch: # trace -a -s sleep 1 <SNIP> qemu-system-x86 (9931), 468 events, 9.6%, 0.000 msec syscall calls total min avg max stddev (msec) (msec) (msec) (msec) (%) ---------- ------ --------- --------- --------- --------- ------ ppoll 98 982.374 0.000 10.024 29.983 12.65% write 34 0.401 0.005 0.012 0.027 5.49% ioctl 102 0.347 0.002 0.003 0.007 3.08% firefox (10871), 1856 events, 38.2%, 0.000 msec (msec) (msec) (msec) (msec) (%) ---------- ------ --------- --------- --------- --------- ------ poll 395 934.873 0.000 2.367 17.120 11.51% recvmsg 395 0.988 0.001 0.003 0.021 4.20% read 106 0.460 0.002 0.004 0.007 3.17% futex 24 0.108 0.001 0.004 0.010 10.05% mmap 2 0.041 0.016 0.021 0.026 23.92% write 6 0.027 0.004 0.004 0.005 2.52% After this patch that ', 0.000 msecs' gets suppressed when --stat is not in use. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-p7emqrsw7900tdkg43v9l1e1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf trace: Sort syscalls stats by msecs in --summaryArnaldo Carvalho de Melo
# trace -a -s sleep 1 <SNIP> Xorg (1965), 788 events, 19.0%, 0.000 msec syscall calls total min avg max stddev (msec) (msec) (msec) (msec) (%) --------------- -------- --------- --------- --------- --------- ------ select 89 731.038 0.000 8.214 175.218 36.71% ioctl 22 0.661 0.010 0.030 0.072 10.43% writev 42 0.253 0.002 0.006 0.011 5.94% recvmsg 60 0.185 0.001 0.003 0.009 5.90% setitimer 60 0.127 0.001 0.002 0.006 6.14% read 52 0.102 0.001 0.002 0.005 8.55% rt_sigprocmask 45 0.092 0.001 0.002 0.023 23.65% poll 12 0.021 0.001 0.002 0.003 7.21% epoll_wait 12 0.019 0.001 0.002 0.002 2.71% firefox (10871), 1080 events, 26.1%, 0.000 msec syscall calls total min avg max stddev (msec) (msec) (msec) (msec) (%) --------------- -------- --------- --------- --------- --------- ------ poll 240 979.562 0.000 4.082 17.132 11.33% recvmsg 240 0.532 0.001 0.002 0.007 3.69% read 60 0.303 0.003 0.005 0.029 8.50% Suggested-by: Milian Wolff <milian.wolff@kdab.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: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-52kdkuyxihq0kvc0n2aalhay@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf trace: Sort summary output by number of eventsArnaldo Carvalho de Melo
# trace -a -s sleep 1 |& grep events | tail gmain (1733), 34 events, 1.0%, 0.000 msec hexchat (9765), 46 events, 1.4%, 0.000 msec ssh (11109), 80 events, 2.4%, 0.000 msec sleep (32631), 81 events, 2.4%, 0.000 msec qemu-system-x86 (10021), 272 events, 8.2%, 0.000 msec Xorg (1965), 322 events, 9.7%, 0.000 msec SoftwareVsyncTh (10922), 366 events, 11.1%, 0.000 msec gnome-shell (2231), 446 events, 13.5%, 0.000 msec qemu-system-x86 (9931), 468 events, 14.1%, 0.000 msec firefox (10871), 1098 events, 33.2%, 0.000 msec [root@jouet ~]# Suggested-by: Milian Wolff <milian.wolff@kdab.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: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ye4cnprhfeiq32ar4lt60dqs@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf tools: Add template for generating rbtree resort classArnaldo Carvalho de Melo
Sometimes we want to sort an existing rbtree by a different key, introduce a template for that, that needs only to be provided the rbtree root and the number of entries in it. To do that a new rbtree will be created with extra space for each entry, where possibly pre-calculated keys will be stored to be used in the resort process and also later, when using the newly sorted rbtree. Please check the following two changesets to see it in use for resorting stats for threads and its syscalls in 'perf trace --summary'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-9l6e1q34lmf3wwdeewstyakg@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-05-05perf machine: Introduce number of threads memberArnaldo Carvalho de Melo
To be used, for instance, for pre-allocating an rb_tree array for sorting by other keys besides the current pid one. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ja0ifkwue7ttjhbwijn6g6eu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf tests: Do not use sizeof on pointer typeVaishali Thakkar
Using sizeof on a malloced pointer type will return the wordsize which can often cause one to allocate a buffer much smaller than it is needed. So, here do not use sizeof on pointer type. Note that this has no effect on runtime because 'dsos' is a pointer to a pointer. Problem found using Coccinelle. Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461862017-23358-1-git-send-email-vaishali.thakkar@oracle.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf trace: Move msg_flags beautifier to tools/perf/trace/beauty/Arnaldo Carvalho de Melo
To reduce the size of builtin-trace.c. 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-11zxg3qitk6bw2x30135k9z4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf record: Generate tracking events for process forked by perfWang Nan
With 'perf record --switch-output' without -a, record__synthesize() in record__switch_output() won't generate tracking events because there's no thread_map in evlist. Which causes newly created perf.data doesn't contain map and comm information. This patch creates a fake thread_map and directly call perf_event__synthesize_thread_map() for those events. Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-8-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf record: Disable buildid cache options by default in switch output modeWang Nan
The cost of buildid cache processing is high: reading all events in output perf.data, opening each elf file to read buildids then copying them into ~/.debug directory. In switch output mode, these heavy works block perf from receiving perf events for too long. Enable no-buildid and no-buildid-cache by default if --switch-output is provided. Still allow user use --no-no-buildid to explicitly enable buildid in this case. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-6-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> [ Updated man page ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf record: Force enable --timestamp-filename when --switch-output is providedWang Nan
Without this patch, the last output doesn't have timestamp appended if --timestamp-filename is not explicitly provided. For example: # perf record -a --switch-output & [1] 11224 # kill -s SIGUSR2 11224 [ perf record: dump data: Woken up 1 times ] # [ perf record: Dump perf.data.2015122622372823 ] # fg perf record -a --switch-output ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.027 MB perf.data (540 samples) ] # ls -l total 836 -rw------- 1 root root 33256 Dec 26 22:37 perf.data <---- *Odd* -rw------- 1 root root 817156 Dec 26 22:37 perf.data.2015122622372823 Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-5-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> [ Updated man page, that also got an entry for --timestamp-filename ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf record: Split output into multiple files via '--switch-output'Wang Nan
Allow 'perf record' to split its output into multiple files. For example: # ~/perf record -a --timestamp-filename --switch-output & [1] 10763 # kill -s SIGUSR2 10763 [ perf record: dump data: Woken up 1 times ] # [ perf record: Dump perf.data.2015122622314468 ] # kill -s SIGUSR2 10763 [ perf record: dump data: Woken up 1 times ] # [ perf record: Dump perf.data.2015122622314762 ] # kill -s SIGUSR2 10763 [ perf record: dump data: Woken up 1 times ] #[ perf record: Dump perf.data.2015122622315171 ] # fg perf record -a --timestamp-filename --switch-output ^C[ perf record: Woken up 1 times to write data ] [ perf record: Dump perf.data.2015122622315513 ] [ perf record: Captured and wrote 0.014 MB perf.data.<timestamp> (296 samples) ] # ls -l total 920 -rw------- 1 root root 797692 Dec 26 22:31 perf.data.2015122622314468 -rw------- 1 root root 59960 Dec 26 22:31 perf.data.2015122622314762 -rw------- 1 root root 59912 Dec 26 22:31 perf.data.2015122622315171 -rw------- 1 root root 19220 Dec 26 22:31 perf.data.2015122622315513 Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-4-git-send-email-wangnan0@huawei.com Signed-off-by: He Kuang <hekuang@huawei.com> [ Added man page entry, used the re-synthesize patch in this series as a fixup ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf tools: Derive trigger class from auxtrace_snapshotWang Nan
auxtrace_snapshot_state matches the trigger model. Use trigger to implement it. auxtrace_snapshot_state and auxtrace_snapshot_err are absorbed. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf tools: Introduce trigger classWang Nan
Use 'trigger' to model operations which need to be executed when an event (a signal, for example) is observed. States and transits: OFF--(on)--> READY --(hit)--> HIT ^ | | (ready) | | \_____________/ is_hit and is_ready are two key functions to query the state of a trigger. is_hit means the event already happen; is_ready means the trigger is waiting for the event. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461178794-40467-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf probe: Use strbuf for making stringsMasami Hiramatsu
Replace many fixed-length char array with strbuf to stringify perf_probe_event and probe_trace_event etc. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160427183713.23446.97377.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf evsel: Remove two extraneous ending newlines in open_strerror()Arnaldo Carvalho de Melo
The error messages returned by this method should not have an ending newline, fix the two cases where it was. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-8af0pazzhzl3dluuh8p7ar7p@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-28perf evsel: Handle ENOMEM for perf_event_max_stack + PERF_SAMPLE_CALLCHAINArnaldo Carvalho de Melo
When the kernel allows tweaking perf_event_max_stack and the event being setup has PERF_SAMPLE_CALLCHAIN in its perf_event_attr.sample_type, tell the user that tweaking /proc/sys/kernel/perf_event_max_stack may solve the problem. Before: # echo 32000 > /proc/sys/kernel/perf_event_max_stack # perf record -g usleep 1 Error: The sys_perf_event_open() syscall returned with 12 (Cannot allocate memory) for event (cycles:ppp). /bin/dmesg may provide additional information. No CONFIG_PERF_EVENTS=y kernel support configured? # After: # echo 64000 > /proc/sys/kernel/perf_event_max_stack # perf record -g usleep 1 Error: Not enough memory to setup event with callchain. Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack Hint: Current value: 64000 # Suggested-by: David Ahern <dsahern@gmail.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ebv0orelj1s1ye857vhb82ov@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-27perf tools: Set the maximum allowed stack from ↵Arnaldo Carvalho de Melo
/proc/sys/kernel/perf_event_max_stack There is an upper limit to what tooling considers a valid callchain, and it was tied to the hardcoded value in the kernel, PERF_MAX_STACK_DEPTH (127), now that this can be tuned via a sysctl, make it read it and use that as the upper limit, falling back to PERF_MAX_STACK_DEPTH for kernels where this sysctl isn't present. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-yjqsd30nnkogvj5oyx9ghir9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf bench: Remove one more die() callArnaldo Carvalho de Melo
Propagate the error instead. Cc: David Ahern <dsahern@gmail.com> Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> 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-z6erjg35d1gekevwujoa0223@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf tools: Update x86's syscall_64.tbl, adding preadv2 & pwritev2Arnaldo Carvalho de Melo
Introduced in commit 4babf2c5efb7 ("x86: wire up preadv2 and pwritev2"). This will make 'perf trace' aware of them. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-vojoylgce2cetsy36446s5ny@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf probe: Fix module probe issue if no dwarf supportRavi Bangoria
Perf is not able to register probe in kernel module when dwarf supprt is not there(and so it goes for symtab). Perf passes full path of module where only module name is required which is causing the problem. This patch fixes this issue. Before applying patch: $ dpkg -s libdw-dev dpkg-query: package 'libdw-dev' is not installed and no information is... $ sudo ./perf probe -m /linux/samples/kprobes/kprobe_example.ko kprobe_init Added new event: probe:kprobe_init (on kprobe_init in /linux/samples/kprobes/kprobe_example.ko) You can now use it in all perf tools, such as: perf record -e probe:kprobe_init -aR sleep 1 $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/kprobe_init /linux/samples/kprobes/kprobe_example.ko:kprobe_init $ sudo ./perf record -a -e probe:kprobe_init [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.105 MB perf.data ] $ sudo ./perf script # No output here After applying patch: $ sudo ./perf probe -m /linux/samples/kprobes/kprobe_example.ko kprobe_init Added new event: probe:kprobe_init (on kprobe_init in kprobe_example) You can now use it in all perf tools, such as: perf record -e probe:kprobe_init -aR sleep 1 $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/kprobe_init kprobe_example:kprobe_init $ sudo ./perf record -a -e probe:kprobe_init [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.105 MB perf.data (2 samples) ] $ sudo ./perf script insmod 13990 [002] 5961.216833: probe:kprobe_init: ... insmod 13995 [002] 5962.889384: probe:kprobe_init: ... Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1461680741-12517-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf probe: Fix offline module name missmatch issueRavi Bangoria
Perf can add a probe on kernel module which has not been loaded yet. The current implementation finds the module name from path. But if the filename is different from the actual module name then perf fails to register a probe while loading module because of mismatch in the names. For example, samples/kobject/kobject-example.ko is loaded as kobject_example. Before applying patch: $ sudo ./perf probe -m /linux/samples/kobject/kobject-example.ko foo_show Added new event: probe:foo_show (on foo_show in kobject-example) You can now use it in all perf tools, such as: perf record -e probe:foo_show -aR sleep 1 $ cat /sys/kernel/debug/tracing/kprobe_events p:probe/foo_show kobject-example:foo_show $ insmod kobject-example.ko $ lsmod Module Size Used by kobject_example 16384 0 Generate read to /sys/kernel/kobject_example/foo while recording data with below command $ sudo ./perf record -e probe:foo_show -a [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.093 MB perf.data ] $./perf report --stdio -F overhead,comm,dso,sym Error: The perf.data.old file has no samples! After applying patch: $ sudo ./perf probe -m /linux/samples/kobject/kobject-example.ko foo_show Added new event: probe:foo_show (on foo_show in kobject_example) You can now use it in all perf tools, such as: perf record -e probe:foo_show -aR sleep 1 $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/foo_show kobject_example:foo_show $ insmod kobject-example.ko $ lsmod Module Size Used by kobject_example 16384 0 Generate read to /sys/kernel/kobject_example/foo while recording data with below command $ sudo ./perf record -e probe:foo_show -a [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.097 MB perf.data (8 samples) ] $ sudo ./perf report --stdio -F overhead,comm,dso,sym ... # Samples: 8 of event 'probe:foo_show' # Event count (approx.): 8 # # Overhead Command Shared Object Symbol # ........ ....... ................. ............ # 100.00% cat [kobject_example] [k] foo_show Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/1461680741-12517-2-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf trace: Read thread's COMM from /proc when not setArnaldo Carvalho de Melo
We get notifications for threads that gets created while we're tracing, but for preexisting threads we may end not having synthesized them, like when tracing a 'perf trace' session that will use '--pid' to trace some other thread. And besides we should probably stop synthesizing those records and instead read thread information in a lazy way, i.e. just when we need, like done in this patch: Now the 'pid_t' argument in 'perf_event_open' gets translated to a COMM: # perf trace -e perf_event_open perf stat -e cycles -p 31601 0.027 ( 0.027 ms): perf/23393 perf_event_open(attr_uptr: 0x2fdd0d8, pid: 31601 (abrt-dump-journ), cpu: -1, group_fd: -1, flags: FD_CLOEXEC) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = 3 ^C And in other syscalls containing pid_t without thread->comm_set at the time of the formatting. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-ioeps6dlwst17d6oozc9shtk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf thread: Introduce method to set comm from /proc/pid/selfArnaldo Carvalho de Melo
Will be used for lazy comm loading in 'perf trace'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-7ogbkuoka1y2qsmcckqxvl5m@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf trace: Do not beautify the 'pid' parameter as a simple integerArnaldo Carvalho de Melo
Leave it alone so that it ends up assigned to SCA_PID via its type, 'pid_t', that will look up the pid on the machine thread rb_tree and possibly find its COMM. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-r7dujgmhtxxfajuunpt1bkuo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf trace: Move perf_flags beautifier to tools/perf/trace/beauty/Arnaldo Carvalho de Melo
To reduce the size of builtin-trace.c. 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-8r3gmymyn3r0ynt4yuzspp9g@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf probe: Set default kprobe group name if it is not givenMasami Hiramatsu
Set kprobe group name as "probe" if it is not given. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160426090413.11891.95640.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf probe: Let probe_file__add_event return 0 if succeededMasami Hiramatsu
Since other methods return 0 if succeeded (or filedesc), let probe_file__add_event() return 0 instead of the length of written bytes. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160426090303.11891.18232.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf tools: Add lsdir() helper to read a directoryMasami Hiramatsu
As a utility function, add lsdir() which reads given directory and store entry name into a strlist. lsdir accepts a filter function so that user can filter out unneeded entries. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160426090242.11891.79014.stgit@devbox [ Do not use the 'dirname' it is used in some distros ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf probe: Close target file on error pathMasami Hiramatsu
Fix a bug to close target elf file in get_text_start_address(). Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20160426064737.1443.44093.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-26perf evlist: Enforce ring buffer readingWang Nan
Don't read broken data after 'head' pointer. Following commits will feed perf_evlist__mmap_read() with some 'head' pointers not maintained by kernel. If 'head' pointer breaks an event, we should avoid reading from the broken event. This can happen in backward ring buffer. For example: old head | | V V +---+------+----------+----+-----+--+ |..E|D....D|C........C|B..B|A....|E.| +---+------+----------+----+-----+--+ 'old' pointer points to the beginning of 'A' and trying read from it, but 'A' has been overwritten. In this case, don't try to read from 'A', simply return NULL. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1461637738-62722-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf hists: Clear dummy entry accumulated periodKan Liang
The accumulated period for dummy entry should also be 0. Otherwise, the total overhead could be overcounted. $ perf record -e '{LLC-load-misses,cpu/instructions/}' --call-graph=lbr ./tchain $ perf report --stdio # To display the perf.data header info, please use --header/--header-only options. # # Total Lost Samples: 0 # # Samples: 21K of event 'anon group { LLC-load-misses, cpu/instructions/ }' # Event count (approx.): 16313667937 # # Children Self Command Shared Object Symbol # ................ ................ ........... ................ ............................ # 4769.98% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] update_fast_timekeeper 4356.18% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] trigger_load_balance 3181.12% 0.01% 0.00% 0.01% tchain_edit [kernel.vmlinux] [k] irq_work_tick 1592.37% 0.00% 0.00% 0.00% tchain_edit [kernel.vmlinux] [k] cpu_needs_another_gp Signed-off-by: Kan Liang <kan.liang@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1461565689-5862-1-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf intel-pt: Fix off-by-one comparison on maximum codeColin Ian King
The check for the maximum code is off-by-one; the current comparison of a code that is INTEL_PT_ERR_MAX will cause the strlcpy to perform an out of bounds array access on the intel_pt_err_msgs array. Fix this with a >= comparison. Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461524203-10224-1-git-send-email-colin.king@canonical.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf bench futex: Simplify wrapper for LOCK_PIDavidlohr Bueso
Given that the 'val' parameter is ignored for FUTEX_LOCK_PI, get rid of the bogus deadlock detection flag in the wrapper code and avoid the extra argument, making it resemble its unlock counterpart. And if nothing else, we already only pass 0 anyway. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Link: http://lkml.kernel.org/r/1461208447-29328-1-git-send-email-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf tests: Replace assignment with comparison on assert checkColin Ian King
The current assert check is checking an assignment, which will always be true. Instead, the assert should be checking if scale is equal to 0.122 Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461419154-16918-1-git-send-email-colin.king@canonical.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf tools: Remove duplicate const qualifierEric Engestrom
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461577678-29517-1-git-send-email-eric.engestrom@imgtec.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf tools: Make the x86 clean quietJiri Olsa
Turn current clean output: $ make clean rm -f arch/x86/include/generated/asm/syscalls_64.c CLEAN libbpf CLEAN libapi into: $ make clean CLEAN x86 CLEAN libapi CLEAN libbpf Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: TJ <linux@iam.tj> Link: http://lkml.kernel.org/r/1461615438-27894-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf evlist: Decode perf_event_attr->branch_sample_typeArnaldo Carvalho de Melo
While trying to use --call-graph lbr in 'perf trace', since we only are interested in the callchain for userspace, up to the callchain, I found that 'perf evlist' is not decoding the branch_sample_type field, fix it. Before: # perf record --call-graph lbr usleep 1 # perf evlist -v cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD|BRANCH_STACK, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, branch_sample_type: 51201 ^^^^^^^^^^^^^^^^^^^^^^^^^ After: # perf evlist -v cycles:ppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|CALLCHAIN|CPU|PERIOD|BRANCH_STACK, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, branch_sample_type: USER|CALL_STACK|NO_FLAGS|NO_CYCLES ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-hozai7974u0ulgx13k96fcaw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf trace: Make --pf honour --min-stack tooArnaldo Carvalho de Melo
To check deeply nested page fault callchains. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-wuji34xx003kr88nmqt6jkgf@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf trace: Make --event honour --min-stack tooArnaldo Carvalho de Melo
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-shj0fazntmskhjild5i6x73l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf script: Fix segfault when printing callchainsChris Phlipot
This fixes a bug caused by an unitialized callchain cursor. The crash frist appeared in: 6f736735e30f ("perf evsel: Require that callchains be resolved before calling fprintf_{sym,callchain}") The callchain cursor is a struct that contains pointers, that when uninitialized will cause unpredictable behavior (usually a crash) when trying to append to the callchain. The existing implementation has the following issues: 1. The callchain cursor used is not initialized, resulting in unpredictable behavior when used. 2. The cursor is declared on the stack. Even if it is properly initalized, the implmentation will leak memory when the function returns, since all the references to the callchain_nodes allocated by callchain_cursor_append will be lost when the cursor goes out of scope. 3. Storing the cursor on the stack is inefficient. Even if memory is properly freed when it goes out of scope, a performance penalty will be incurred due to reallocation of callchain nodes. callchain_cursor_append is designed to avoid these reallocations when an existing cursor is reused. This patch fixes the crash by replacing cursor_callchain with a reference to the global callchain_cursor which also resolves all 3 issues mentioned above. How to reproduce the crash: $ perf record --call-graph=dwarf stress -t 1 -c 1 $ perf script > /dev/null Segfault Signed-off-by: Chris Phlipot <cphlipot0@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 6f736735e30f ("perf evsel: Require that callchains be resolved before calling fprintf_{sym,callchain}") Link: http://lkml.kernel.org/r/1461119531-2529-1-git-send-email-cphlipot0@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf trace: Make --pf maj/min/all use callchains tooArnaldo Carvalho de Melo
Forgot about page faults, a software event, when adding support for callchains, fix it: # trace --no-syscalls --pf maj --call dwarf 0.000 ( 0.000 ms): Xorg/2068 majfault [sfbSegment1+0x0] => /usr/lib64/xorg/modules/drivers/intel_drv.so@0x11b490 (x.) sfbSegment1+0x0 (/usr/lib64/xorg/modules/drivers/intel_drv.so) fbPolySegment32+0x361 (/usr/lib64/xorg/modules/drivers/intel_drv.so) sna_poly_segment+0x743 (/usr/lib64/xorg/modules/drivers/intel_drv.so) damagePolySegment+0x77 (/usr/libexec/Xorg) ProcPolySegment+0xe7 (/usr/libexec/Xorg) Dispatch+0x25f (/usr/libexec/Xorg) dix_main+0x3c3 (/usr/libexec/Xorg) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) _start+0x29 (/usr/libexec/Xorg) 0.257 ( 0.000 ms): Xorg/2068 majfault [miZeroClipLine+0x0] => /usr/libexec/Xorg@0x18e830 (x.) miZeroClipLine+0x0 (/usr/libexec/Xorg) _fbSegment+0x2c0 (/usr/lib64/xorg/modules/drivers/intel_drv.so) sfbSegment1+0x67 (/usr/lib64/xorg/modules/drivers/intel_drv.so) fbPolySegment32+0x361 (/usr/lib64/xorg/modules/drivers/intel_drv.so) sna_poly_segment+0x743 (/usr/lib64/xorg/modules/drivers/intel_drv.so) damagePolySegment+0x77 (/usr/libexec/Xorg) ProcPolySegment+0xe7 (/usr/libexec/Xorg) Dispatch+0x25f (/usr/libexec/Xorg) dix_main+0x3c3 (/usr/libexec/Xorg) __libc_start_main+0xf0 (/usr/lib64/libc-2.22.so) _start+0x29 (/usr/libexec/Xorg) ^C# Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-8h6ssirw5z15qyhy2lwd6f89@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf trace: Extract evsel contructor from perf_evlist__add_pgfaultArnaldo Carvalho de Melo
Prep work for next patches, where we'll need access to the created evsels, to possibly configure callchains. 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-2pcgsgnkgellhlcao4aub8tu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-25perf buildid: Fix off-by-one in write_buildid()Andrey Ryabinin
write_buildid() increments 'name_len' with intention to take into account trailing zero byte. However, 'name_len' was already incremented in machine__write_buildid_table() before. So this leads to out-of-bounds read in do_write(): $ ./perf record sleep 0 [ perf record: Woken up 1 times to write data ] ================================================================= ==15899==ERROR: AddressSanitizer: global-buffer-overflow on address 0x00000099fc92 at pc 0x7f1aa9c7eab5 bp 0x7fff940f84d0 sp 0x7fff940f7c78 READ of size 19 at 0x00000099fc92 thread T0 #0 0x7f1aa9c7eab4 (/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/libasan.so.2+0x44ab4) #1 0x649c5b in do_write util/header.c:67 #2 0x649c5b in write_padded util/header.c:82 #3 0x57e8bc in write_buildid util/build-id.c:239 #4 0x57e8bc in machine__write_buildid_table util/build-id.c:278 ... 0x00000099fc92 is located 0 bytes to the right of global variable '*.LC99' defined in 'util/symbol.c' (0x99fc80) of size 18 '*.LC99' is ascii string '[kernel.kallsyms]' ... Shadow bytes around the buggy address: 0x00008012bf80: f9 f9 f9 f9 00 00 00 00 00 00 03 f9 f9 f9 f9 f9 =>0x00008012bf90: 00 00[02]f9 f9 f9 f9 f9 00 00 00 00 00 05 f9 f9 0x00008012bfa0: f9 f9 f9 f9 00 03 f9 f9 f9 f9 f9 f9 00 00 00 00 Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461053847-5633-1-git-send-email-aryabinin@virtuozzo.com [ Remove the off-by one at the origin, to keep len(s) == strlen(s) assumption ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-23Merge tag 'perf-core-for-mingo-20160419' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: Build fixes: - Fix 'perf trace' build when DWARF unwind isn't available (Arnaldo Carvalho de Melo) - Remove x86 references from arch-neutral Build, fixing it in !x86 arches, reported as breaking the build for powerpc64le in linux-next (Arnaldo Carvalho de Melo) Infrastructure changes: - Do memset() variable 'st' using the correct size in the jit code (Colin Ian King) - Fix postgresql ubuntu 'perf script' install instructions (Chris Phlipot) - Use callchain_param more thoroughly when checking how callchains were configured, eventually will be the only way to look for callchain parameters (Arnaldo Carvalho de Melo) - Fix some issues in the 'perf test kallsyms' entry (Arnaldo Carvalho de Melo) Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-23Merge branch 'perf/urgent' into perf/core, to resolve conflictIngo Molnar
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-19perf test: Add missing verbose output explaining the reason for failureArnaldo Carvalho de Melo
One of the branches leading to an error had no debug message emitted, fix it, the new lines are: # perf test -v kallsyms <SNIP> 0xffffffff81001000: diff name v: xen_hypercall_set_trap_table k: hypercall_page 0xffffffff810691f0: diff name v: try_to_free_pud_page k: try_to_free_pmd_page <SNIP> 0xffffffff8150bb20: diff name v: wakeup_expire_count_show.part.5 k: wakeup_active_count_show.part.7 0xffffffff816bc7f0: diff name v: phys_switch_id_show.part.11 k: phys_port_name_show.part.12 0xffffffff817bbb90: diff name v: __do_softirq k: __softirqentry_text_start <SNIP> This in turn exercises another bug, still under investigation, because those aliases _are_ in kallsyms, with the same name... 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> Fixes: ab414dcda8fa ("perf test: Fixup aliases checking in the 'vmlinux matches kallsyms' test") Link: http://lkml.kernel.org/n/tip-5fhea7a54a54gsmagu9obpr4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-19perf test: Ignore kcore files in the "vmlinux matches kallsyms" testArnaldo Carvalho de Melo
Before: # perf test -v kallsyms <SNIP> Maps only in vmlinux: ffffffff81d5e000-ffffffff81ec3ac8 115e000 [kernel].init.text ffffffff81ec3ac8-ffffffffa0000000 12c3ac8 [kernel].exit.text ffffffffa0000000-ffffffffa000c000 0 [fjes] ffffffffa000c000-ffffffffa0017000 0 [video] ffffffffa0017000-ffffffffa001c000 0 [grace] <SNIP> ffffffffa0a7f000-ffffffffa0ba5000 0 [xfs] ffffffffa0ba5000-ffffffffffffffff 0 [veth] Maps in vmlinux with a different name in kallsyms: Maps only in kallsyms: ffff880000100000-ffff88001000b000 80000103000 [kernel.kallsyms] ffff88001000b000-ffff880100000000 8001000e000 [kernel.kallsyms] ffff880100000000-ffffc90000000000 80100003000 [kernel.kallsyms] <SNIP> ffffffffa0000000-ffffffffff600000 7fffa0003000 [kernel.kallsyms] ffffffffff600000-ffffffffffffffff 7fffff603000 [kernel.kallsyms] test child finished with -1 ---- end ---- vmlinux symtab matches kallsyms: FAILED! # After: # perf test -v 1 1: vmlinux symtab matches kallsyms : --- start --- test child forked, pid 7058 Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.6.0-rc1+/build/vmlinux for symbols 0xffffffff81076870: diff end addr for aesni_gcm_dec v: 0xffffffff810791f2 k: 0xffffffff81076902 0xffffffff81079200: diff end addr for aesni_gcm_enc v: 0xffffffff8107bb03 k: 0xffffffff81079292 0xffffffff8107e8d0: diff end addr for aesni_gcm_enc_avx_gen2 v: 0xffffffff81083e76 k: 0xffffffff8107e943 0xffffffff81083e80: diff end addr for aesni_gcm_dec_avx_gen2 v: 0xffffffff81089611 k: 0xffffffff81083ef3 0xffffffff81089990: diff end addr for aesni_gcm_enc_avx_gen4 v: 0xffffffff8108e7c4 k: 0xffffffff81089a03 0xffffffff8108e7d0: diff end addr for aesni_gcm_dec_avx_gen4 v: 0xffffffff810937ef k: 0xffffffff8108e843 Maps only in vmlinux: ffffffff81d5e000-ffffffff81ec3ac8 115e000 [kernel].init.text ffffffff81ec3ac8-ffffffffa0000000 12c3ac8 [kernel].exit.text Maps in vmlinux with a different name in kallsyms: Maps only in kallsyms: test child finished with -1 ---- end ---- vmlinux symtab matches kallsyms: FAILED! # 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> Fixes: 8e0cf965f95e ("perf symbols: Add support for reading from /proc/kcore") Link: http://lkml.kernel.org/n/tip-n6vrwt9t89w8k769y349govx@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2016-04-19perf symbols: Allow loading kallsyms without considering kcore filesArnaldo Carvalho de Melo
Before the support for using /proc/kcore was introduced, the kallsyms routines used /proc/modules and the first 'perf test' entry expected finding maps for each module in the system, which is not the case with the kcore code. Provide a way to ignore kcore files so that the test can have its expectations met. Improving the test to cover kcore files as well needs to be done. 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-ek5urnu103dlhfk4l6pcw041@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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