- 09 Dec, 2014 1 commit
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Rabin Vincent authored
The memset benchmark is largely copy-pasted from the memcpy benchmark. Prepare the memcpy file for merge with memset by extracting out a generic function. Signed-off-by:
Rabin Vincent <rabin.vincent@axis.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Rabin Vincent <rabinv@axis.com> Link: http://lkml.kernel.org/r/1417535441-3965-1-git-send-email-rabin.vincent@axis.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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- 08 Dec, 2014 2 commits
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements from Arnaldo Carvalho de Melo: User visible changes: - Support handling complete branch stacks as histograms (Andi Kleen) Infrastructure changes: - Prep work for supporting per-pkg and snapshot counters in 'perf stat' (Jiri Olsa) Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: User visible changes: - Callchain improvements from Andi Kleen including: * Enable printing the srcline in the history * Make get_srcline fall back to sym+offset - Allow to force redirect pr_debug to stderr. (Andi Kleen) - TUI hist_entry browser fixes, including showing missing overhead value for first level callchain. Detected comparing the output of --stdio/--gui (that matched) with --tui, that had this problem. (Namhyung Kim) - Fix segfault due to invalid kernel dso access (Namhyung Kim) Infrastructure changes: - Move bfd_demangle stubbing to its only user (Arnaldo Carvalho de Melo) - 'perf stat' refactorings, moving stuff from it to evsel.c to use in per-pkg/snapshot format changes (Jiri Olsa) - Add per-pkg format file parsing (Matt Fleming) Signed-off-by:
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- 01 Dec, 2014 9 commits
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Andi Kleen authored
Enable CCKEY_ADDRESS address history sorting with --branch-history. This makes get_srcline display the source lines correctly, otherwise all history entries for a function a hunked into one. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1416275935-20971-1-git-send-email-andi@firstfloor.orgSigned-off-by:
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Andi Kleen authored
Add a --branch-history option to perf report that changes all the settings necessary for using the branches in callstacks. This is just a short cut to make this nicer to use, it does not enable any functionality by itself. v2: Change sort order. Rename option to --branch-history to be less confusing. v3: Updates v4: Fix conflict with newer perf base v5: Port to latest tip v6: Add more comments. Remove CCKEY_ADDRESS setting. Remove unnecessary branch_mode setting. Use a boolean. Signed-off-by: -
Andi Kleen authored
Currently branch stacks can be only shown as edge histograms for individual branches. I never found this display particularly useful. This implements an alternative mode that creates histograms over complete branch traces, instead of individual branches, similar to how normal callgraphs are handled. This is done by putting it in front of the normal callgraph and then using the normal callgraph histogram infrastructure to unify them. This way in complex functions we can understand the control flow that lead to a particular sample, and may even see some control flow in the caller for short functions. Example (simplified, of course for such simple code this is usually not needed), please run this after the whole patchkit is in, as at this point in the patch order there is no --branch-history, that will be added in a patch after this one: tcall.c: volatile a = 10000, b = 100000, c; __attribute__((noinline)) f2() { c = a / b; } __attribute__((noinline)) f1() { f2(); f2(); } main() { int i; for (i = 0; i < 1000000; i++) f1(); } % perf record -b -g ./tsrc/tcall [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.044 MB perf.data (~1923 samples) ] % perf report --no-children --branch-history ... 54.91% tcall.c:6 [.] f2 tcall | |--65.53%-- f2 tcall.c:5 | | | |--70.83%-- f1 tcall.c:11 | | f1 tcall.c:10 | | main tcall.c:18 | | main tcall.c:18 | | main tcall.c:17 | | main tcall.c:17 | | f1 tcall.c:13 | | f1 tcall.c:13 | | f2 tcall.c:7 | | f2 tcall.c:5 | | f1 tcall.c:12 | | f1 tcall.c:12 | | f2 tcall.c:7 | | f2 tcall.c:5 | | f1 tcall.c:11 | | | --29.17%-- f1 tcall.c:12 | f1 tcall.c:12 | f2 tcall.c:7 | f2 tcall.c:5 | f1 tcall.c:11 | f1 tcall.c:10 | main tcall.c:18 | main tcall.c:18 | main tcall.c:17 | main tcall.c:17 | f1 tcall.c:13 | f1 tcall.c:13 | f2 tcall.c:7 | f2 tcall.c:5 | f1 tcall.c:12 The default output is unchanged. This is only implemented in perf report, no change to record or anywhere else. This adds the basic code to report: - add a new "branch" option to the -g option parser to enable this mode - when the flag is set include the LBR into the callstack in machine.c. The rest of the history code is unchanged and doesn't know the difference between LBR entry and normal call entry. - detect overlaps with the callchain - remove small loop duplicates in the LBR Current limitations: - The LBR flags (mispredict etc.) are not shown in the history and LBR entries have no special marker. - It would be nice if annotate marked the LBR entries somehow (e.g. with arrows) v2: Various fixes. v3: Merge further patches into this one. Fix white space. v4: Improve manpage. Address review feedback. v5: Rename functions. Better error message without -g. Fix crash without -b. v6: Rebase v7: Rebase. Use NO_ENTRY in memset. v8: Port to latest tip. Move add_callchain_ip to separate patch. Skip initial entries in callchain. Minor cleanups. Signed-off-by: -
Jiri Olsa authored
The .snapshot file indicates that the provided event value is a snapshot value. Bypassing the delta computation logic for such event. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-12-git-send-email-jolsa@kernel.orgSigned-off-by:
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Jiri Olsa authored
The .per-pkg file indicates that all but one value per socket should be discarded. Adding the logic of skipping the rest of the socket once first value was read. Signed-off-by:
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Jiri Olsa authored
Removing the perf_evsel__read interfaces because we replaced the only user in the stat command code. Signed-off-by:
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Jiri Olsa authored
Use the read_counter function as the values retrieval function for aggr counter values thus eliminating the use of __perf_evsel__read function. Signed-off-by:
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Jiri Olsa authored
The read function will be used later for both aggr and cpu counters, so we need to make it work over threads as well. Signed-off-by:
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Jiri Olsa authored
Replacing __perf_evsel__read_on_cpu function with perf_evsel__read_cb function. The read_cb callback will be used later for global aggregation counter values as well. Signed-off-by:
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- 24 Nov, 2014 12 commits
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Jiri Olsa authored
The .snapshot file indicates that the provided event value is a snapshot value and we have to bypass the delta computation logic. Adding support to check up this file and set event flag accordingly. Signed-off-by:
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Matt Fleming authored
The .per-pkg file indicates that all but one value per socket should be discarded. Adding support to check up this file and set event flag accordingly. This patch is part of Matt's original patch: http://marc.info/?l=linux-kernel&m=141527675002139&w=2 only the file parsing part, the rest is solved differently. Signed-off-by:
Matt Fleming <matt.fleming@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-9-git-send-email-jolsa@kernel.orgSigned-off-by:
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Jiri Olsa authored
Adding perf_evsel__read_cb read function that retuns count values via callback. It will be used later in stat command as single way to retrieve counter values. Signed-off-by:
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Jiri Olsa authored
Factoring out scale login into perf_counts_values__scale function. Signed-off-by:
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Jiri Olsa authored
Making compute_deltas functions global and renaming it to perf_evsel__compute_deltas. It will be used in stat command in later patch. Signed-off-by:
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Andi Kleen authored
When debugging the tui browser I find it useful to redirect the debug log into a file. Currently it's always forced to the message line. Add an option to force it to stderr. Then it can be easily redirected. Example: [root@zoo ~]# perf --debug stderr report -vv 2> /tmp/debug [root@zoo ~]# tail /tmp/debug dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory dso open failed, mmap: No such file or directory Using /root/.debug/.build-id/4e/841948927029fb650132253642d5dbb2c1fb93 for symbols Failed to open /tmp/perf-8831.map, continuing without symbols Failed to open /tmp/perf-12721.map, continuing without symbols Failed to open /tmp/perf-6966.map, continuing without symbols Failed to open /tmp/perf-8802.map, continuing without symbols [root@zoo ~]# Signed-off-by:
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Namhyung Kim authored
Jiri reported that the commit 96d78059 ("perf tools: Make vmlinux short name more like kallsyms short name") segfaults on perf script. When processing kernel mmap event, it should access the 'kernel' variable as sometimes it cannot find a matching dso from build-id table so 'dso' might be invalid. Reported-by:
Jiri Olsa <jolsa@redhat.com> Tested-by:
Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1416285028-30572-1-git-send-email-namhyung@kernel.orgSigned-off-by:
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Andi Kleen authored
When the source line is not found fall back to sym + offset. This is generally much more useful than a raw address. For this we need to pass in the symbol from the caller. For some callers it's awkward to compute, so we stay at the old behaviour. Signed-off-by:
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Arnaldo Carvalho de Melo authored
We need to define bfd_demangle() to either a wrapper for cplus_demangle() or to a stub when NO_DEMANGLE is defined. That is at odds with using bfd.h for some other reason, as it defines bfd_demangle() and then if code that wants to use symbol.h, where the above stubbing/wrapping is done, and bfd.h for other reasons, we end up with a build error where bfd_demangle() is found to be redefined. Avoid that by moving the stubbing/wrapping to symbol-elf.c, that is the only user of such function. If we ever get to a point where there are more valid users, we can then introduce a header for that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-6wzjpe2fy9xtgchshulixlzw@git.kernel.orgSigned-off-by:
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Andi Kleen authored
For lbr-as-callgraph we need to see the line number in the history, because many LBR entries can be in a single function, and just showing the same function name many times is not useful. When the history code is configured to sort by address, also try to resolve the address to a file:srcline and display this in the browser. If that doesn't work still display the address. This can be also useful without LBRs for understanding which call in a large function (or in which inlined function) called something else. Contains fixes from Namhyung Kim v2: Refactor code into common function v3: Fix GTK build v4: Rebase Signed-off-by:
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Namhyung Kim authored
If first level callchain has more than single path like when -g caller option is given, it should show only first one in the path and hide others. But it didn't do it properly and just hindered the output. Before: - 80.33% 11.11% abc2 abc2 [.] main + 86.18% main 13.82% __libc_start_main main After: - 80.33% 11.11% abc2 abc2 [.] main + 86.18% main + 13.82% __libc_start_main Signed-off-by: -
Namhyung Kim authored
Currently perf report on TUI doesn't print percent for first-level callchain entry. I guess it (wrongly) assumes that there's only a single callchain in the first level. This patch fixes it by handling the first level callchains same as others - if it's not 100% it should print the percent value. Also it'll affect other callchains in the other way around - if it's 100% (single callchain) it should not print the percentage. Before: - 30.95% 6.84% abc2 abc2 [.] a - a - 70.00% c - 100.00% apic_timer_interrupt smp_apic_timer_interrupt local_apic_timer_interrupt hrtimer_interrupt ... + 30.00% b + __libc_start_main After: - 30.95% 6.84% abc2 abc2 [.] a - 77.90% a - 70.00% c - apic_timer_interrupt smp_apic_timer_interrupt local_apic_timer_interrupt hrtimer_interrupt ... + 30.00% b + 22.10% __libc_start_main Reported-by:
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- 20 Nov, 2014 1 commit
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: User visible fixes: - Fallback to kallsyms when using the minimal 'ELF' loader (Arnaldo Carvalho de Melo) - Fix annotation with kcore (Adrian Hunter) - Fix up srcline histogram key formatting (Arnaldo Carvalho de Melo) - Add missing handler for PERF_RECORD_MMAP2 events in 'perf diff' (Kan Liang) User visible changes/new features: - Only print base source file for srcline histogram sort key (Andi Kleen) - Support source line numbers in annotate using a hotkey (Andi Kleen) Infrastructure changes and fixes: - Do not poll events that use the system_wide flag (Adrian Hunter) - Add perf-read-vdso32 and perf-read-vdsox32 to .gitignore (Adrian Hunter) - Only override the default :tid comm entry (Adrian Hunter) - Factor out adding new call chain entries (Andi Kleen) - Use al.addr to set up call chain (Andi Kleen) - Use a common function to resolve symbol or name (Andi Kleen) - Fix ftrace:function event recording (Jiri Olsa) - Move disable_buildid_cache() to util/build-id.c (Namhyung Kim) - Clean up libelf feature support code (Namhyung Kim) - Fix typo in python 'perf test' (WANG Chao) Signed-off-by:
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- 19 Nov, 2014 15 commits
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Adrian Hunter authored
Events may still be ordered even if there are no timestamps e.g. if the data is recorded per-thread. Also synthesized COMM events have a timestamp of zero. Consequently it is better to keep comm entries even if they have a timestamp of zero. However, when a struct thread is created the command string is not known and a comm entry with a string of the form ":<tid>" is used. In that case thread->comm_set is false and the comm entry should be overridden. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1415715423-15563-4-git-send-email-adrian.hunter@intel.comSigned-off-by:
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Adrian Hunter authored
Recently added executables Add perf-read-vdso32 and perf-read-vdsox32 need to be added to .gitignore. Signed-off-by:
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Adrian Hunter authored
The system_wide flag causes a selected event to be opened always without a pid. Consequently it will never get a POLLHUP, but it is used for tracking in combination with other events, so it should not need to be polled anyway. Therefore don't add it for polling. Signed-off-by:
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Jiri Olsa authored
Following patch fails (-EINVAL) ftrace:function with enabled user space callchains: cfa77bc4 perf: Disallow user-space callchains for function trace events We need to follow in perf tool itself and explicitly set the perf_event_attr::exclude_callchain_user flag for ftrace:function event. Reported-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Kan Liang authored
Without mmap2, perf diff fails to find the symbol name. The default symbol sort key doesn't work well. Signed-off-by:
Kan Liang <kan.liang@intel.com> Acked-by:
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Arnaldo Carvalho de Melo authored
Problem introduced in: commit 5b591669 "perf report: Honor column width setting" Where the left justification signal was after the width, which ended up, when the width was, say, 11, always printing: %11.11-s Instead of src:line left justified and limited to 11 chars. Resulting in a like: 70.93% %11.11-s [.] f2 tcall When it should instead be: 70.93% tcall.c:5 [.] f2 tcall Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <andi@firstfloor.org> 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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-2xnt0vqkoox52etq2qhyetr0@git.kernel.orgSigned-off-by:
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Andi Kleen authored
With srcline key/sort'ing it's useful to have line numbers in the annotate window. This patch implements this. Use objdump -l to request the line numbers and save them in the line structure. Then the browser displays them for source lines. The line numbers are not displayed by default, but can be toggled on with 'k' There is one unfortunate problem with this setup. For lines not containing source and which are outside functions objdump -l reports line numbers off by a few: it always reports the first line number in the next function even for lines that are outside the function. I haven't found a nice way to detect/correct this. Probably objdump has to be fixed. See https://sourceware.org/bugzilla/show_bug.cgi?id=16433 The line numbers are still useful even with these problems, as most are correct and the ones which are not are nearby. v2: Fix help text. Handle (discriminator...) output in objdump. Left align the line numbers. Signed-off-by:
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Andi Kleen authored
For perf report with --sort srcline only print the base source file name. This makes the results generally fit much better to the screen. The path is usually not that useful anyways because it is often from different systems. Signed-off-by:
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Andi Kleen authored
Refactor the duplicated code to resolve the symbol name or the address of a symbol into a single function. Used in next patch to add common functionality. Signed-off-by:
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Andi Kleen authored
Use the relative address, this makes get_srcline work correctly in the end. Signed-off-by:
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Andi Kleen authored
Move the code to resolve and add a new callchain entry into a new add_callchain_ip function. This will be used in the next patches to add LBRs too. No change in behavior. Signed-off-by:
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Adrian Hunter authored
Patch "perf tools: Fix build-id matching on vmlinux" breaks annotation with kcore. The problem is that symbol__annotate() first gets the filename based on the build-id which was previously not set. This patch provides a quick fix, however there should probably be only one way to determine the filename. e.g. symbol__annotate() should use the same way as dso__data_fd(). Signed-off-by:
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WANG Chao authored
Library loading in python syntax should be 'import perf', not 'use perf'. Signed-off-by:
WANG Chao <chaowang@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jean Pihet <jean.pihet@linaro.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.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/1415780826-13250-1-git-send-email-chaowang@redhat.comSigned-off-by:
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Arnaldo Carvalho de Melo authored
The minimal ELF loader should not return 1 when it manages to read the vmlinux build-id, it should instead return 0, meaning that it hasn't loaded any symbols, since it doesn't parses ELF at all. That way, the main symbol.c routines will understand that it is necessary to continue looking for a file with symbols, and when no libelf is linked, that means it will eventually try kallsyms. Reported-by:
Peter Zijlstra <peterz@infradead.org> Tested-by:
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Namhyung Kim authored
Current EXTLIBS contains -lelf by default and removes it when libelf is not detected. This is little bit confusing since we can now build perf without libelf so there's no need to handle it differently than other libraries. Signed-off-by:
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