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* | perf stat: Move shadow stat counters into separate objectJiri Olsa2015-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Separating shadow counters code into separate object as a cleanup, but mainly for upcomming changes, so could use it from script command context. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1433341559-31848-10-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf stat: Replace transaction event possition check with id checkJiri Olsa2015-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Using perf_stat::id to check for transaction events, instead of current position based way. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1433341559-31848-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf stat: Add id into perf_stat structJiri Olsa2015-06-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We need fast way to identify evsel as transaction event for shadow counters computation. Currently we are using possition (in evlist) based way. Adding 'id' into 'struct perf_stat' so it can carry transaction event ID and we can use it for shadow counters computations. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20150604135055.GB23625@krava.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: handle PERF_RECORD_LOST_SAMPLESKan Liang2015-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch modifies the perf tool to handle the new RECORD type, PERF_RECORD_LOST_SAMPLES. The number of lost-sample events is stored in .nr_events[PERF_RECORD_LOST_SAMPLES]. The exact number of samples which the kernel dropped is stored in total_lost_samples. When the percentage of dropped samples is greater than 5%, a warning is printed. Here are some examples: Eg 1, Recording different frequently-occurring events is safe with the patch. Only a very low drop rate is associated with such actions. $ perf record -e '{cycles:p,instructions:p}' -c 20003 --no-time ~/tchain ~/tchain $ perf report -D | tail SAMPLE events: 120243 MMAP2 events: 5 LOST_SAMPLES events: 24 FINISHED_ROUND events: 15 cycles:p stats: TOTAL events: 59348 SAMPLE events: 59348 instructions:p stats: TOTAL events: 60895 SAMPLE events: 60895 $ perf report --stdio --group # To display the perf.data header info, please use --header/--header-only options. # # # Total Lost Samples: 24 # # Samples: 120K of event 'anon group { cycles:p, instructions:p }' # Event count (approx.): 24048600000 # # Overhead Command Shared Object Symbol # ................ ........... ................ .................................. # 99.74% 99.86% tchain_edit tchain_edit [.] f3 0.09% 0.02% tchain_edit tchain_edit [.] f2 0.04% 0.00% tchain_edit [kernel.vmlinux] [k] ixgbe_read_reg Eg 2, Recording the same thing multiple times can lead to high drop rate, but it is not a useful configuration. $ perf record -e '{cycles:p,cycles:p}' -c 20003 --no-time ~/tchain Warning: Processed 600592 samples and lost 99.73% samples! [perf record: Woken up 148 times to write data] [perf record: Captured and wrote 36.922 MB perf.data (1206322 samples)] [perf record: Woken up 1 times to write data] [perf record: Captured and wrote 0.121 MB perf.data (1629 samples)] Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@infradead.org Cc: eranian@google.com Link: http://lkml.kernel.org/r/1431285195-14269-9-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | perf record: Add support for sampling indirect jumpsStephane Eranian2015-06-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a new branch sampling type support for indirect jumps: perf record -j ind_jmp ....... It enables analysis of indirect jumps targets. It requires kernel and possibly hardware support to operate correctly. Signed-off-by: Stephane Eranian <eranian@google.com> [ Fixup against: f00898f4e20b (perf tools: Move branch option parsing to own file) ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@redhat.com Cc: dsahern@gmail.com Cc: jolsa@redhat.com Cc: kan.liang@intel.com Cc: namhyung@kernel.org Link: http://lkml.kernel.org/r/1431637800-31061-4-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
* | perf tools: Deal with kernel module names in '[]' correctlyWang Nan2015-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before patch ba92732e9808 ('perf kmaps: Check kmaps to make code more robust'), 'perf report' and 'perf annotate' will segfault if trace data contains kernel module information like this: # perf report -D -i ./perf.data ... 0 0 0x188 [0x50]: PERF_RECORD_MMAP -1/0: [0xffffffbff1018000(0xf068000) @ 0]: x [test_module] ... # perf report -i ./perf.data --objdump=/path/to/objdump --kallsyms=/path/to/kallsyms perf: Segmentation fault -------- backtrace -------- /path/to/perf[0x503478] /lib64/libc.so.6(+0x3545f)[0x7fb201f3745f] /path/to/perf[0x499b56] /path/to/perf(dso__load_kallsyms+0x13c)[0x49b56c] /path/to/perf(dso__load+0x72e)[0x49c21e] /path/to/perf(map__load+0x6e)[0x4ae9ee] /path/to/perf(thread__find_addr_map+0x24c)[0x47deec] /path/to/perf(perf_event__preprocess_sample+0x88)[0x47e238] /path/to/perf[0x43ad02] /path/to/perf[0x4b55bc] /path/to/perf(ordered_events__flush+0xca)[0x4b57ea] /path/to/perf[0x4b1a01] /path/to/perf(perf_session__process_events+0x3be)[0x4b428e] /path/to/perf(cmd_report+0xf11)[0x43bfc1] /path/to/perf[0x474702] /path/to/perf(main+0x5f5)[0x42de95] /lib64/libc.so.6(__libc_start_main+0xf4)[0x7fb201f23bd4] /path/to/perf[0x42dfc4] This is because __kmod_path__parse treats '[' leading names as kernel name instead of names of kernel module. If perf.data contains build information and the buildid of such modules can be found, the dso->kernel of it will be set to DSO_TYPE_KERNEL by __event_process_build_id(), not kernel module. It will then be passed to dso__load() -> dso__load_kernel_sym() -> dso__load_kcore() if --kallsyms is provided. The refered patch adds NULL pointer checker to avoid segfault. However, such kernel modules are still processed incorrectly. This patch fixes __kmod_path__parse, makes it treat names like '[test_module]' as kernel modules. kmod-path.c is also update to reflect the above changes. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/1433321541-170245-1-git-send-email-wangnan0@huawei.com [ Fixed the merged with 0443f36b0de0 ("perf machine: Fix the search for the kernel DSO on the unified list" ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | tools: Move tools/perf/util/include/linux/{list.h,poison.h} to tools/includeWang Nan2015-06-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves list.h from tools/perf/util/include/linux/list.h to tools/include/linux/list.h to enable other libraries use macros in it, like libbpf which will be introduced by further patches. Since list.h depend on poison.h, poison.h is also moved. Both file use relative path, so one '..' is removed for each header to make them suit for new directory. MANIFEST is also updated for 'make perf-*-src-pkg'. Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1433144296-74992-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Move linux/kernel.h to tools/includeWang Nan2015-06-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves kernel.h from tools/perf/util/include/linux/kernel.h to tools/include/linux/kernel.h to enable other libraries use macros in it, like libbpf which will be introduced by further patches. MANIFEST is also updated for 'make perf-*-src-pkg'. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kaixu Xia <xiakaixu@huawei.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1433144296-74992-2-git-send-email-wangnan0@huawei.com [ Fixed up the ifdef guard to match other entries in tools/include/linux ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Fix the search for the kernel DSO on the unified listArnaldo Carvalho de Melo2015-06-02
| | | | | | | | | | | | | | | | | | | | | | | | | | When unifying the user_dsos and kernel_dsos a bug was introduced by inverting the check for dso->kernel, fix it. Fixes: 3d39ac538629 ("perf machine: No need to have two DSOs lists") Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-xnrnq0kams3s2z9ek1wjb506@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Remove newline char when reading event scale and unitMadhavan Srinivasan2015-06-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The <fd979c013207> commit intruduced the perf_event_sysfs_show function to display the event_str value of an attr in kernel/event/core.c. But the function returns the value with a newline char. So, if a event also carries a event.unit file, when printing the counter data perf tool formatting goes for a spin. That is, because of the event unit, event name is printed in the newline because of perf_event_sysfs_show returns with a newline char. Now fixing perf core will break API, hencing proposing a fix in the perf tool. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1433052383-21802-1-git-send-email-maddy@linux.vnet.ibm.com [ Add spaces around operators ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Fix segfault when glob matching function without debuginfoWang Nan2015-05-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 4c859351226c920b227fec040a3b447f0d482af3 ("perf probe: Support glob wildcards for function name") introduces segfault problems when debuginfo is not available: # perf probe 'sys_w*' Added new events: Segmentation fault The first problem resides in find_probe_trace_events_from_map(). In that function, find_probe_functions() is called to match each symbol against glob to find the number of matching functions, but still use map__for_each_symbol_by_name() to find 'struct symbol' for matching functions. Unfortunately, map__for_each_symbol_by_name() does exact matching by searching in an rbtree. It doesn't know glob matching, and not easy for it to support it because it use rbtree based binary search, but we are unable to ensure all names matched by the glob (any glob passed by user) reside in one subtree. This patch drops map__for_each_symbol_by_name(). Since there is no rbtree again, re-matching all symbols costs a lot. This patch avoid it by saving all matching results into an array (syms). The second problem is the lost of tp->realname. In __add_probe_trace_events(), if pev->point.function is glob, the event name should be set to tev->point.realname. This patch ensures its existence by strdup sym->name instead of leaving a NULL pointer there. After this patch: # perf probe 'sys_w*' Added new events: probe:sys_waitid (on sys_w*) probe:sys_wait4 (on sys_w*) probe:sys_waitpid (on sys_w*) probe:sys_write (on sys_w*) probe:sys_writev (on sys_w*) You can now use it in all perf tools, such as: perf record -e probe:sys_writev -aR sleep 1 Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/1432892747-232506-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Fix up vdso methods namesArnaldo Carvalho de Melo2015-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To make it consistent with the other dso lifetime routines. For instance: struct dso *vdso__new(struct machine *machine, const char *short_name, const char *long_name) Becomes: struct dso *machine__addnew_vdso(struct machine *machine, const char *short_name, const char *long_name) Because: 1) There is no 'struct vdso' for us to have vdso__ prefixed routines. 2) Because it will not really just create a new instance of 'struct dso', it'll call dso__new() but it will also insert it into the DSO's list/rbtree, and we have a method name for that: 'addnew', just like we have dsos__addnew(). 3) So it is really a 'struct machine' operation, it is the first argument, etc. This way the place where this is used gets consistent: if (vdso) { pgoff = 0; - dso = vdso__dso_findnew(machine, thread); + dso = machine__findnew_vdso(machine, thread); } else dso = machine__findnew_dso(machine, filename); Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-r3w3tvh8exm9xfz3p4tz9qbz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Introduce machine__findnew_dso() methodArnaldo Carvalho de Melo2015-05-29
| | | | | | | | | | | | | | | | | | | | | | | | Similar to machine__findnew_thread(), also prepping for refcounting and locking, this time for struct dso instances. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/n/tip-fv3tshv5o1413coh147lszjc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: No need to have two DSOs listsArnaldo Carvalho de Melo2015-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We can, given a DSO, figure out if it is a kernel, a kernel module or a userlevel DSO, so stop having to process two lists in several functions. If searching becomes an issue at some point, we can have them in a rbtree, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-s4yb0onpdywu6dj2xl9lxi4t@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Adopt findnew_kernel methodArnaldo Carvalho de Melo2015-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It never was a 'struct dso' method, so fix that by rename dso__kernel_findnew() to machine__findnew_kernel(). At some point I'll move it all to the machine.[ch] files, for now lets ease patch review by not moving too much stuff. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-zrxmblgsg5vx0iv4rhvq2f6l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf db-export: Fix thread ref-countingAdrian Hunter2015-05-29
| | | | | | | | | | | | | | | | | | | | | | Thread ref-counting was not done for get_main_thread() meaning that there was a thread__get() from machine__find_thread() that was not being paired with thread__put(). Fix that. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1432906425-9911-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Fix 'function unused' warningWang Nan2015-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By 'make build-test' a warning is found in probe-event.c that, after commit 419e873828 (perf probe: Show the error reason comes from invalid DSO) the only user of kernel_get_module_dso() is open_debuginfo(). Which is not compiled if HAVE_DWARF_SUPPORT not set. 'make build-test' found this problem when make_minimal. This patch moves kernel_get_module_dso() to HAVE_DWARF_SUPPORT ifdef section. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1432779905-206143-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Move branch option parsing to own fileAndi Kleen2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | .. to allow sharing between builtin-record and builtin-top later. No code changes, just moved code. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1432749114-904-9-git-send-email-andi@firstfloor.org [ Rename too generic branch.[ch] name to parse-branch-options.[ch] ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf annotation: Add symbol__get_annotationAndi Kleen2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | Add a new utility function to get an function annotation out of existing code. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1432749114-904-4-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Add hint for 'Too many events are opened.' error messageJiri Olsa2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enhancing the 'Too many events are opened.' error message with hint to use use 'ulimit -n <limit>' command. Before: $ perf record -e 'sched:*,syscalls:*' ls Error: Too many events are opened. Try again after reducing the number of events. Now: $ perf record -e 'sched:*,syscalls:*' ls Error: Too many events are opened. Probably the maximum number of open file descriptors has been reached. Hint: Try again after reducing the number of events. Hint: Try increasing the limit with 'ulimit -n <limit>' Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432587114-14924-1-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Reference count struct mapArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have pointers to struct map instances in several places, like in the hist_entry instances, so we need a way to know when we can destroy them, otherwise we may either keep leaking them or end up referencing deleted instances. Start fixing it by reference counting them. This patch puts the reference count for struct map in place, replacing direct map__delete() calls with map__put() ones and then grabbing a reference count when adding it to the maps struct where maps for a struct thread are kept. Next we'll grab reference counts when setting pointers to struct map instances, in places like in the hist_entry code. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-wi19xczk0t2a41r1i2chuio5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Check if a map is still in use when deleting itArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I.e. match RB_CLEAR_NODE() with RB_EMPTY_NODE(), to check that it isn't in a rb tree at the time of its deletion. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-vumvhird765id11zbx00d2r8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Protect accesses the map rbtrees with a rw lockArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To allow concurrent access, next step: refcount struct map instances, so that we can ditch maps->removed_maps and stop leaking threads, maps, then struct DSO needs the same treatment. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-o45w2w5dzrza38nzqxnqzhyf@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Introduce struct mapsArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | That for now has the maps rbtree and the list for the dead maps, that may be still referenced from some hist_entry, etc. This paves the way for protecting the rbtree with a lock, then refcount the maps and finally remove the removed_maps list, as it'll not ne anymore needed. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-fl0fa6142pj8khj97fow3uw0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Fix an error when deleting probes successfullyMasami Hiramatsu2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a bug in del_perf_probe_events() which returns an error (-ENOENT) even if the probes are successfully deleted. This happens only if the probes are on user-apps and not on kernel, simply because it doesn't clear the previous error. So, without this fix, we get an error even though events are being successfully removed. ------ # ./perf probe -x ./perf del_perf_probe_events Added new event: probe_perf:del_perf_probe_events (on del_perf_probe_events in ... You can now use it in all perf tools, such as: perf record -e probe_perf:del_perf_probe_events -aR sleep 1 # ./perf probe -d \*:\* Removed event: probe_perf:del_perf_probe_events Error: Failed to delete events. ------ This fixes the above error. ------ # ./perf probe -d \*:\* Removed event: probe_perf:del_perf_probe_events ------ Reported-by: Arnaldo Carvalho de Melo <acme@kernel.org> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Link: http://lkml.kernel.org/r/20150527083725.23880.45209.stgit@localhost.localdomain Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf probe: Show the error reason comes from invalid DSOMasami Hiramatsu2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Show the reason of error when dso__load* fails. This shows when user gives wrong kernel image or wrong path. Without this, perf probe shows an obscure message: ---- $ perf probe -k ~/kbin/linux-3.x86_64/vmlinux -L vfs_read Failed to find path of kernel module. Error: Failed to show lines. ---- With this, perf shows appropriate error message: ---- $ perf probe -k ~/kbin/linux-3.x86_64/vmlinux -L vfs_read Failed to find the path for kernel: Mismatching build id Error: Failed to show lines. ---- And: ---- $ perf probe -k /non-exist/kernel/vmlinux -L vfs_read Failed to find the path for kernel: No such file or directory Error: Failed to show lines. ---- Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Link: http://lkml.kernel.org/r/20150527083718.23880.84100.stgit@localhost.localdomain Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Disallow PMU events intel_pt and intel_bts until there is supportAdrian Hunter2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Disallow PMU events intel_pt and intel_bts until the tools support them. By default any PMU is selectable as an event but until the tools have intel_pt and intel_bts support using them would result in no data being recorded without any indication as to why. Before the change: $ perf record -e intel_bts// sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.008 MB perf.data ] $ perf report --stdio Error: The perf.data file has no samples! After the change: $ perf record -e intel_bts// sleep 1 invalid or unsupported event: 'intel_bts//' Run 'perf list' for a list of valid events Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1432295653-13989-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Assign default value for some pointersMartin Liška2015-05-27
| | | | | | | | | | | | | | | | | | | | Assign default value for pointers that are identified by the compiler as non-initialized. Signed-off-by: Martin Liska <mliska@suse.cz> Acked-by: Ingo Molnar <mingo@kernel.org> Link: http://lkml.kernel.org/r/5564393C.1090104@suse.cz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Use maps__first()/map__next()Arnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In a few more remaining places, for consistency. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-c2n7slwtto29wndfttdrhfrx@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Leave DSO destruction to the map destructionArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As the way DSOs are created are normally via dsos__findnew, so that we don't have to load the same dso multiple times for multiple maps (think about /lib64/libc.so.6), so they may be shared and dso__delete() should be left to be done as part of the map destruction process. This will all be properly solved by reference counting struct dso, which will be done soon. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-gbrohe1nvkjxw3u5a1bgj3yh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Mark removed threads as suchArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We use: BUG_ON(!RB_EMPTY_NODE(&thread->rb_node)); in the thread destructor as a debugging check to find out about possibly still referenced thread instances being deleted, to do that we need to make sure we use RB_CLEAR_NODE() right after rb_erase(), i.e. that we use the newly introduced rb_erase_init(), that works just like list_del_init(). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-4fcqo5ypy1cjjf15ilb0hn78@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Import rb_erase_init from block/ in the kernel sourcesArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I was assuming rb_erase() was setting things up like list_del_init, but the fact that thread__delete() was being sucessfull is because the last thing before deleting is to remove the thread from the machine->dead_threads list, using list_del_init(), that has the same effect as using rb_erase_init()... Introduce this function so that we can use it when removing objects from rb_trees. Then we will be able to BUG_ON(still on a list) in destructors. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-55b16mbtndjyd7zzg8nmnamx@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Nuke unused map_groups__flush()Arnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since: 9fdbf671ba7e "perf tools: do not flush maps on COMM for perf report" We have no users of this function, nuke it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Luigi Semenzato <semenzato@chromium.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-hsac1t42ehtva8gut8qe6hih@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Remove redundant initialization of thread linkage membersArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A thread moves from a rb tree to a list, but can't be on both, because those linkage members are in a union. This is leftover from when I was debugging thread refcounting and had nuked that union. It is harmless duplication, as RB_CLEAR_NODE() does again what INIT_LIST_HEAD does. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-hmma9lmip6qlhzhgkhp9tzd1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Rename maps__nextArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It really is a 'struct map' method, and since we're introducing a new 'struct maps' class, fix it to avoid confusion. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-xo9ifhk53cfl30wqcuhxpnvl@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Add dso__data_get/put_fd()Namhyung Kim2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using dso__data_fd() in multi-thread environment is not safe since returned fd can be closed and/or reused anytime. So convert it to the dso__data_get/put_fd() pair to protect the access with lock. The original dso__data_fd() is deprecated and kept only for testing. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432137821-10853-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Get rid of dso__data_fd() from dso__data_size()Namhyung Kim2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems that the dso__data_fd() was needed to find a binary type since open in data_file_size() alone used to fail. But as it can open the dso fine now, the dso__data_fd() can go away. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432137821-10853-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Fix dso__data_read_offset() file openingNamhyung Kim2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When dso__data_read_offset/addr() is called without prior dso__data_fd() (or other functions which call it internally), it failed to open dso in data_file_size() since its binary type was not identified. However calling dso__data_fd() in dso__data_read_offset() will hurt performance as it grabs a global lock everytime. So factor out the loop on the binary type in dso__data_fd(), and call it from both. Reported-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432137821-10853-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf machine: Do not call map_groups__delete(), drop refcnt insteadArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It could be used somewhere, so just call map__groups_put() to make sure we don't delete it prematurely Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-dxmh8mr12i65p8h909vi88cp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf comm: Use atomic.h for refcountingArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have atomic.h, we should convert all of the existing refcounts to use it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-quzeuy3jwsyod6e06o39cl6y@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf hists: Rename add_hist_entry to hists__findnew_entryArnaldo Carvalho de Melo2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To match the convention used elsewhere. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-66oo6yn8upssfeuprwy0il1q@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf hists: Reducing arguments of hist_entry_iter__add()Namhyung Kim2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | The evsel and sample arguments are to set iter for later use. As it also receives an iter as another argument, just set them before calling the function. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1432022650-18205-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf session: Fix perf_session__peek_event()Adrian Hunter2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | perf_session__peek_event() generally leverages there being a single mmap of the perf.data file, however on 32-bit platforms when there is more that 32MiB of data, then there are multiple mmaps, so perf_session__peek_event() reads from the file. In that case a couple of bugs were exposed (note how the seg. fault appears with >32M of data): $ perf record --per-thread -e intel_bts// ../rtit-tests/loopy 1000000 [ perf record: Woken up 13 times to write data ] [ perf record: Captured and wrote 24.568 MB perf.data ] $ perf script > /dev/null $ perf record --per-thread -e intel_bts// ../rtit-tests/loopy 10000000 [ perf record: Woken up 136 times to write data ] [ perf record: Captured and wrote 270.794 MB perf.data ] $ perf script > /dev/null Segmentation fault (core dumped) The wrong address was being passed to the readn() function and the buffer size was not being checked. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Link: http://lkml.kernel.org/r/1432040746-1755-5-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Fix parse_events_error dereferencesAdrian Hunter2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | Parse errors can be reported in struct parse_events_error but the pointer passed is optional and can be NULL. Ensure it is not NULL before dereferencing it. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Link: http://lkml.kernel.org/r/1432040746-1755-4-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Fix function declarations needed by parse-events.yAdrian Hunter2015-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch "perf tools: Add location to pmu event terms" moved declarations for parse_events_term__num() and parse_events_term__str() so that they were no longer visible in parse-events.y. That can result in segfaults as the arguments no longer need match the function prototype. Move the declarations back, changing YYLTYPE pointers to pointers-to-void because YYLTYPE is not generated until parse-events.y is processed. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Link: http://lkml.kernel.org/r/1432040746-1755-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Set vmlinux_path__nr_entries to 0 in vmlinux_path__exitWang Nan2015-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Original vmlinux_path__exit() doesn't revert vmlinux_path__nr_entries to its original state. After the while loop vmlinux_path__nr_entries becomes -1 instead of 0. This makes a problem that, if runs twice, during the second run vmlinux_path__init() will set vmlinux_path[-1] to strdup("vmlinux"), corrupts random memory. This patch reset vmlinux_path__nr_entries to 0 after the while loop. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexei Starovoitov <ast@plumgrid.com Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: pi3orama@163.com Cc: Zefan Li <lizefan@huawei.com> Link: http://lkml.kernel.org/r/1431860222-61636-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Protect dso cache fd with a mutexNamhyung Kim2015-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When dso cache is accessed in multi-thread environment, it's possible to close other dso->data.fd during operation due to open file limit. Protect the file descriptors using a separate mutex. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1431909055-21442-28-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf symbols: Protect dso cache tree using dso->lockNamhyung Kim2015-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dso cache is accessed during dwarf callchain unwind and it might be processed concurrently. Protect it under dso->lock. Note that it doesn't protect dso_cache__find(). I think it's safe to access to the cache tree without the lock since we don't delete nodes. It it missed an existing node due to rotation, it'll find it during dso_cache__insert() anyway. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1431909055-21442-27-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf symbols: Protect dso symbol loading using a mutexNamhyung Kim2015-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add mutex to protect it from concurrent dso__load(). Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1431909055-21442-26-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* | perf tools: Introduce copyfile_offset() functionNamhyung Kim2015-05-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The copyfile_offset() function is to copy source data from given offset to a destination file with an offset. It'll be used to build an indexed data file. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20150304145824.GD7519@krava.brq.redhat.com Link: http://lkml.kernel.org/r/1431909055-21442-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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