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2014-04-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds2-1/+10
Pull arch/tile updates from Chris Metcalf: "These fix a few stray build issues seen in linux-next, and also add the minimal required support for perf to tilegx" * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: arch/tile: remove unused variable 'devcap' tile: Fix vDSO compilation issue with allyesconfig perf tools: Allow building for tile tile/perf: Support perf_events on tilegx and tilepro tile: Enable NMIs on return from handle_nmi() without errors tile: Add support for handling PMC hardware tile: don't use __get_cpu_var() with structure-typed arguments tile: avoid overflow in ns2cycles
2014-03-31Merge branch 'perf-core-for-linus' of ↵Linus Torvalds88-1295/+2819
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf changes from Ingo Molnar: "Main changes: Kernel side changes: - Add SNB/IVB/HSW client uncore memory controller support (Stephane Eranian) - Fix various x86/P4 PMU driver bugs (Don Zickus) Tooling, user visible changes: - Add several futex 'perf bench' microbenchmarks (Davidlohr Bueso) - Speed up thread map generation (Don Zickus) - Introduce 'perf kvm --list-cmds' command line option for use by scripts (Ramkumar Ramachandra) - Print the evsel name in the annotate stdio output, prep to fix support outputting annotation for multiple events, not just for the first one (Arnaldo Carvalho de Melo) - Allow setting preferred callchain method in .perfconfig (Jiri Olsa) - Show in what binaries/modules 'perf probe's are set (Masami Hiramatsu) - Support distro-style debuginfo for uprobe in 'perf probe' (Masami Hiramatsu) Tooling, internal changes and fixes: - Use tid in mmap/mmap2 events to find maps (Don Zickus) - Record the reason for filtering an address_location (Namhyung Kim) - Apply all filters to an addr_location (Namhyung Kim) - Merge al->filtered with hist_entry->filtered in report/hists (Namhyung Kim) - Fix memory leak when synthesizing thread records (Namhyung Kim) - Use ui__has_annotation() in 'report' (Namhyung Kim) - hists browser refactorings to reuse code accross UIs (Namhyung Kim) - Add support for the new DWARF unwinder library in elfutils (Jiri Olsa) - Fix build race in the generation of bison files (Jiri Olsa) - Further streamline the feature detection display, trimming it a bit to show just the libraries detected, using VF=1 gets a more verbose output, showing the less interesting feature checks as well (Jiri Olsa). - Check compatible symtab type before loading dso (Namhyung Kim) - Check return value of filename__read_debuglink() (Stephane Eranian) - Move some hashing and fs related code from tools/perf/util/ to tools/lib/ so that it can be used by more tools/ living utilities (Borislav Petkov) - Prepare DWARF unwinding code for using an elfutils alternative unwinding library (Jiri Olsa) - Fix DWARF unwind max_stack processing (Jiri Olsa) - Add dwarf unwind 'perf test' entry (Jiri Olsa) - 'perf probe' improvements including memory leak fixes, sharing the intlist class with other tools, uprobes/kprobes code sharing and use of ref_reloc_sym (Masami Hiramatsu) - Shorten sample symbol resolving by adding cpumode to struct addr_location (Arnaldo Carvalho de Melo) - Fix synthesizing mmaps for threads (Don Zickus) - Fix invalid output on event group stdio report (Namhyung Kim) - Fixup header alignment in 'perf sched latency' output (Ramkumar Ramachandra) - Fix off-by-one error in 'perf timechart record' argv handling (Ramkumar Ramachandra) Tooling, cleanups: - Remove unused thread__find_map function (Jiri Olsa) - Remove unused simple_strtoul() function (Ramkumar Ramachandra) Tooling, documentation updates: - Update function names in debug messages (Ramkumar Ramachandra) - Update some code references in design.txt (Ramkumar Ramachandra) - Clarify load-latency information in the 'perf mem' docs (Andi Kleen) - Clarify x86 register naming in 'perf probe' docs (Andi Kleen)" * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (96 commits) perf tools: Remove unused simple_strtoul() function perf tools: Update some code references in design.txt perf evsel: Update function names in debug messages perf tools: Remove thread__find_map function perf annotate: Print the evsel name in the stdio output perf report: Use ui__has_annotation() perf tools: Fix memory leak when synthesizing thread records perf tools: Use tid in mmap/mmap2 events to find maps perf report: Merge al->filtered with hist_entry->filtered perf symbols: Apply all filters to an addr_location perf symbols: Record the reason for filtering an address_location perf sched: Fixup header alignment in 'latency' output perf timechart: Fix off-by-one error in 'record' argv handling perf machine: Factor machine__find_thread to take tid argument perf tools: Speed up thread map generation perf kvm: introduce --list-cmds for use by scripts perf ui hists: Pass evsel to hpp->header/width functions explicitly perf symbols: Introduce thread__find_cpumode_addr_location perf session: Change header.misc dump from decimal to hex perf ui/tui: Reuse generic __hpp__fmt() code ...
2014-03-18perf tools: Remove unused simple_strtoul() functionRamkumar Ramachandra1-6/+0
Moreover, the corresponding function in include/linux/kernel.h is marked obsolete. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395176715-4465-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf tools: Update some code references in design.txtRamkumar Ramachandra1-6/+6
Update the names of some functions and enums in design.txt. The document still has some stale information, but the motivation behind this patch is to allow a developer to quickly grep and learn about the associated structures. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395169804-1293-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf evsel: Update function names in debug messagesRamkumar Ramachandra1-2/+2
perf_event_open() was renamed to sys_perf_event_open(); update the debug messages to reflect this. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395169842-1399-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf tools: Remove thread__find_map functionJiri Olsa1-6/+0
Because it's not used any more. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> 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/1395154016-26709-3-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf annotate: Print the evsel name in the stdio outputArnaldo Carvalho de Melo1-5/+9
So that when showing multiple events annotations, we can figure out which is which: # perf record -a -e instructions,cycles sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.826 MB perf.data (~36078 samples) ] # perf evlist instructions cycles # perf annotate intel_idle 2> /dev/null | head -1 Percent | Source code & Disassembly of vmlinux for instructions # Cc: 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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-n1r51l329434js84qtb2c6l9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf report: Use ui__has_annotation()Namhyung Kim1-1/+1
Since we introduced the ui__has_annotation() for that, don't open code it. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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/1395124359-11744-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf tools: Fix memory leak when synthesizing thread recordsNamhyung Kim1-3/+3
Checking default guest machine should be done before allocating event structures otherwise it'll leak memory. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Link: http://lkml.kernel.org/r/87ob15tx6a.fsf@sejong.aot.lge.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf tools: Use tid in mmap/mmap2 events to find mapsDon Zickus2-2/+3
Now that we can properly synthesize threads system-wide, make sure the mmap and mmap2 events use tids instead of pids to locate their maps. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393429527-167840-3-git-send-email-dzickus@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf report: Merge al->filtered with hist_entry->filteredNamhyung Kim2-2/+2
I.e. don't drop al->filtered entries, create the hist_entries and use its ->filtered bitmap, that is kept with the same semantics for its bitmap, leaving the filtering to be done at the hist_entry level, i.e. in the UIs. This will allow zooming in/out the filters. Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> 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/n/tip-xeyhkepu7plw716lrtb0zlnu@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf symbols: Apply all filters to an addr_locationNamhyung Kim1-10/+4
Instead of bailing out as soon as we find a filter that applies, go on checking all of them so that we can zoom in/out filters. We also need to make sure we only update al->filtered after thread__find_addr_map(), because there is where al->filtered gets initialized to zero. This will increase the cost of processing when all we don't need this toggling, but will provide flexibility for the TUI and GTK+ interfaces, that will incur in creating the hist_entries just once. Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> 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/n/tip-fhv9lhzdjxgp9w3w3668lsfw@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf symbols: Record the reason for filtering an address_locationNamhyung Kim6-17/+25
By turning the addr_location->filtered member from a boolean to a u8 bitmap, reusing (and extending) the hist_filter enum for that. This patch doesn't change the logic at all, as it keeps the meaning of al->filtered !0 to mean that the entry _was_ filtered, so no change in how this value is interpreted needs to be done at this point. This will be soon used in upcoming patches. Signed-off-by: Namhyung Kim <namhyung.kim@lge.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> 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/n/tip-89hmfgtr9t22sky1lyg7nw7l@git.kernel.org [ yanked this out of a previous patch ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf sched: Fixup header alignment in 'latency' outputRamkumar Ramachandra1-5/+5
Before: --------------------------------------------------------------------------------------------------------------- Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at | --------------------------------------------------------------------------------------------------------------- ... | | | | | git:24540 | 336.622 ms | 10 | avg: 0.032 ms | max: 0.062 ms | max at: 115610.111046 s git:24541 | 0.457 ms | 1 | avg: 0.000 ms | max: 0.000 ms | max at: 0.000000 s ----------------------------------------------------------------------------------------- TOTAL: | 396.542 ms | 353 | --------------------------------------------------- After: ----------------------------------------------------------------------------------------------------------------- Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at | ----------------------------------------------------------------------------------------------------------------- ... | | | | | git:24540 | 336.622 ms | 10 | avg: 0.032 ms | max: 0.062 ms | max at: 115610.111046 s git:24541 | 0.457 ms | 1 | avg: 0.000 ms | max: 0.000 ms | max at: 0.000000 s ----------------------------------------------------------------------------------------------------------------- TOTAL: | 396.542 ms | 353 | --------------------------------------------------- Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1395065901-25740-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-18perf timechart: Fix off-by-one error in 'record' argv handlingRamkumar Ramachandra1-1/+1
Since 367b315 (perf timechart: Add support for -P and -T in timechart recording, 2013-11-01), the 'perf timechart record' command stopped working: $ perf timechart record -- git status Workload failed: No such file or directory This happens because of an off-by-one error while preparing the argv for cmd_record(): it attempts to execute the command 'status' and complains that it doesn't exist. Fix this error. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Acked-by: Stanislav Fomichev <stfomichev@yandex-team.ru> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stanislav Fomichev <stfomichev@yandex-team.ru> Link: http://lkml.kernel.org/r/1394985965-2332-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf machine: Factor machine__find_thread to take tid argumentJiri Olsa3-6/+12
Forcing the code to always search thread by pid/tid pair. The PID value will be needed in future to determine the process thread leader for map groups sharing. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> 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/1394805606-25883-3-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf tools: Speed up thread map generationDon Zickus1-8/+51
When trying to capture perf data on a system running spejbb2013, perf hung for about 15 minutes. This is because it took that long to gather about 10,000 thread maps and process them. I don't think a user wants to wait that long. Instead, recognize that thread maps are roughly equivalent to pid maps and just quickly copy those instead. To do this, I synthesize 'fork' events, this eventually calls thread__fork() and copies the maps over. The overhead goes from 15 minutes down to about a few seconds. -- V2: based on Jiri's comments, moved malloc up a level and made sure the memory was freed Signed-off-by: Don Zickus <dzickus@redhat.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Joe Mario <jmario@redhat.com> Link: http://lkml.kernel.org/r/1394808224-113774-1-git-send-email-dzickus@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf kvm: introduce --list-cmds for use by scriptsRamkumar Ramachandra4-13/+46
Introduce $ perf kvm --list-cmds to dump a raw list of commands for use by the completion script. In order to do this, introduce parse_options_subcommand() for handling subcommands as a special case in the parse-options machinery. Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Acked-by: David Ahern <dsahern@gmail.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1393896396-10427-1-git-send-email-artagnon@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf ui hists: Pass evsel to hpp->header/width functions explicitlyNamhyung Kim5-24/+21
Those functions need evsel to investigate event group and it's passed via hpp->ptr. However as it can be missed easily so it's better to pass it via an argument IMHO. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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/1394437440-11609-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf symbols: Introduce thread__find_cpumode_addr_locationArnaldo Carvalho de Melo3-25/+34
Its one level up thread__find_addr_location, where it will look in different domains for a sample: user, kernel, hypervisor, etc. Will soon be used by a patchkit by Andi Kleen. 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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-so6nxkh7xj48bc5kq4jpj991@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf session: Change header.misc dump from decimal to hexDon Zickus1-1/+1
When printing the raw dump of a data file, the header.misc is printed as a decimal. Unfortunately, that field is a bit mask, so it is hard to interpret as a decimal. Print in hex, so the user can easily see what bits are set and more importantly what type of info it is conveying. V2: add 0x in front per Jiri Olsa Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393386227-149412-3-git-send-email-dzickus@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf ui/tui: Reuse generic __hpp__fmt() codeNamhyung Kim4-91/+63
The __hpp__color_fmt used in the TUI code can be replace by the generic code with small change in print_fn callback. And it also needs to move callback function to the generic __hpp__fmt(). No functional changes intended. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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/1393809254-4480-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf ui/hists: Pass struct hpp to print functionsNamhyung Kim4-29/+76
Instead of the pointer to buffer and its size so that it can also get private argument passed along with hpp. This is a preparation of further change. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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/1393809254-4480-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf ui/gtk: Reuse generic __hpp__fmt() codeNamhyung Kim3-69/+19
The __hpp__color_fmt used in the gtk code can be replace by the generic code with small change in print_fn callback. This is a preparation to upcoming changes and no functional changes intended. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1393809254-4480-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf ui/stdio: Fix invalid output on event group reportNamhyung Kim1-4/+16
When some of group member has 0 overhead, it printed previous percentage instead of 0.00%. It's because passing integer 0 as a percent rather than double 0.0 so the remaining bits came from garbage. The TUI and GTK don't have this problem since they pass 0.0. Before: # Samples: 845 of event 'anon group { cycles, cache-references, cache-misses }' # Event count (approx.): 174775051 # # Overhead Samples # ........................ .................................... # 20.32% 8.58% 73.51% 45 30 138 6.87% 6.87% 6.87% 21 0 0 5.29% 0.31% 0.31% 10 1 0 1.89% 1.89% 1.89% 6 0 0 1.76% 1.76% 1.76% 2 0 0 After: # Overhead Samples # ........................ .................................... # 20.32% 8.58% 73.51% 45 30 138 6.87% 0.00% 0.00% 21 0 0 5.29% 0.31% 0.00% 10 1 0 1.89% 0.00% 0.00% 6 0 0 1.76% 0.00% 0.00% 2 0 0 Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> 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/1393809254-4480-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf bench: Fix NULL pointer dereference in "perf bench all"Patrick Palka1-1/+1
The for_each_bench() macro must check that the "benchmarks" field of a collection is not NULL before dereferencing it because the "all" collection in particular has a NULL "benchmarks" field (signifying that it has no benchmarks to iterate over). This fixes this NULL pointer dereference when running "perf bench all": [root@ssdandy ~]# perf bench all <SNIP> # Running mem/memset benchmark... # Copying 1MB Bytes ... 2.453675 GB/Sec 12.056327 GB/Sec (with prefault) Segmentation fault (core dumped) [root@ssdandy ~]# Signed-off-by: Patrick Palka <patrick@parcs.ath.cx> Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1394664051-6037-1-git-send-email-patrick@parcs.ath.cx Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf tools: Fix synthesizing mmaps for threadsDon Zickus1-55/+56
Currently if a process creates a bunch of threads using pthread_create and then perf is run in system_wide mode, the mmaps for those threads are not captured with a synthesized mmap event. The reason is those threads are not visible when walking the /proc/ directory looking for /proc/<pid>/maps files. Instead they are discovered using the /proc/<pid>/tasks file (which the synthesized comm event uses). This causes problems when a program is trying to map a data address to a tid. Because the tid has no maps, the event is dropped. Changing the program to look up using the pid instead of the tid, finds the correct maps but creates ugly hacks in the program to carry the correct tid around. Fix this by moving the walking of the /proc/<pid>/tasks up a level (out of the comm function) based on Arnaldo's suggestion. Tweaked things a bit to special case the 'full' bit and 'guest' check. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393429527-167840-2-git-send-email-dzickus@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf probe: Clarify x86 register naming for perf probeAndi Kleen1-0/+2
Clarify how to specify x86 registers in perf probe. I recently ran into this problem and had to figure it out from the source. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Link: http://lkml.kernel.org/r/1393596135-4227-3-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf mem: Clarify load-latency in documentationAndi Kleen1-0/+4
Clarify in the documentation that 'perf mem report' reports use-latency, not load/store-latency on Intel systems. This often causes confusion with users. Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393596135-4227-2-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf bench: Add futex-requeue microbenchmarkDavidlohr Bueso5-0/+227
Block a bunch of threads on a futex and requeue them on another, N at a time. This program is particularly useful to measure the latency of nthread requeues without waking up any tasks -- thus mimicking a regular futex_wait. An example run: $ perf bench futex requeue -r 100 -t 64 Run summary [PID 151011]: Requeuing 64 threads (from 0x7d15c4 to 0x7d15c8), 1 at a time. [Run 1]: Requeued 64 of 64 threads in 0.0400 ms [Run 2]: Requeued 64 of 64 threads in 0.0390 ms [Run 3]: Requeued 64 of 64 threads in 0.0400 ms ... [Run 100]: Requeued 64 of 64 threads in 0.0390 ms Requeued 64 of 64 threads in 0.0399 ms (+-0.37%) Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Acked-by: Darren Hart <dvhart@linux.intel.com> Cc: Aswin Chandramouleeswaran <aswin@hp.com> Cc: Darren Hart <dvhart@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Low <jason.low2@hp.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hp.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <Waiman.Long@hp.com> Link: http://lkml.kernel.org/r/1387081917-9102-4-git-send-email-davidlohr@hp.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf bench: Add futex-wake microbenchmarkDavidlohr Bueso5-0/+214
Block a bunch of threads on a futex and wake them up, N at a time. This program is particularly useful to measure the latency of nthread wakeups in non-error situations: all waiters are queued and all wake calls wakeup one or more tasks. An example run: $ perf bench futex wake -t 512 -r 100 Run summary [PID 27823]: blocking on 512 threads (at futex 0x7e10d4), waking up 1 at a time. [Run 1]: Wokeup 512 of 512 threads in 6.0080 ms [Run 2]: Wokeup 512 of 512 threads in 5.2280 ms [Run 3]: Wokeup 512 of 512 threads in 4.8300 ms ... [Run 100]: Wokeup 512 of 512 threads in 5.0100 ms Wokeup 512 of 512 threads in 5.0109 ms (+-2.25%) Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Acked-by: Darren Hart <dvhart@linux.intel.com> Cc: Aswin Chandramouleeswaran <aswin@hp.com> Cc: Darren Hart <dvhart@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Low <jason.low2@hp.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hp.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <Waiman.Long@hp.com> Link: http://lkml.kernel.org/r/1387081917-9102-3-git-send-email-davidlohr@hp.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf bench: Add futex-hash microbenchmarkDavidlohr Bueso6-1/+277
Introduce futexes to perf-bench and add a program that stresses and measures the kernel's implementation of the hash table. This is a multi-threaded program that simply measures the amount of failed futex wait calls - we only want to deal with the hashing overhead, so a negative return of futex_wait_setup() is enough to do the trick. An example run: $ perf bench futex hash -t 32 Run summary [PID 10989]: 32 threads, each operating on 1024 [private] futexes for 10 secs. [thread 0] futexes: 0x19d9b10 ... 0x19dab0c [ 418713 ops/sec ] [thread 1] futexes: 0x19daca0 ... 0x19dbc9c [ 469913 ops/sec ] [thread 2] futexes: 0x19dbe30 ... 0x19dce2c [ 479744 ops/sec ] ... [thread 31] futexes: 0x19fbb80 ... 0x19fcb7c [ 464179 ops/sec ] Averaged 454310 operations/sec (+- 0.84%), total secs = 10 Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Acked-by: Darren Hart <dvhart@linux.intel.com> Cc: Aswin Chandramouleeswaran <aswin@hp.com> Cc: Darren Hart <dvhart@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Low <jason.low2@hp.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Scott J Norton <scott.norton@hp.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Waiman Long <Waiman.Long@hp.com> Link: http://lkml.kernel.org/r/1387081917-9102-2-git-send-email-davidlohr@hp.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-14perf bench numa: Make no args mean 'run all tests'Arnaldo Carvalho de Melo1-0/+1
If we call just: perf bench numa mem it will present the same output as: perf bench numa mem -h i.e. ask for instructions about what to run. While that is kinda ok, using 'run all tests' as the default, i.e. making 'no parms' be equivalent to: perf bench numa mem -a Will allow: perf bench numa all to actually do what is asked: i.e. run all the 'bench' tests, instead of responding to that by asking what to do. That, in turn, allows: perf bench all to actually complete, for the same reasons. And after that, the tests that come after that, and that at some point hit a NULL deref, will run, allowing me to reproduce a recently reported problem. That when you have the needed numa libraries, which wasn't the case for the reporter, making me a bit confused after trying to reproduce his report. So make no parms mean -a. Cc: 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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Patrick Palka <patrick@parcs.ath.cx> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-x7h0ghx4pef4n0brywg21krk@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-11perf tools: Disable user-space callchain/stack dumps for function trace eventsJiri Olsa2-11/+48
User space callchains and user space stack dump were disabled for function trace event. Mailing list discussions: http://marc.info/?t=139302086500001&r=1&w=2 http://marc.info/?t=139301437300003&r=1&w=2 Catching up with perf and disabling user space callchains and DWARF unwind (uses user stack dump) for function trace event. Adding following warnings when callchains are used for function trace event: # perf record -g -e ftrace:function ... Disabling user space callchains for function trace event. ... # ./perf record --call-graph=dwarf -e ftrace:function ... Cannot use DWARF unwind for function trace event, falling back to framepointers. Disabling user space callchains for function trace event. ... Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1393775800-13524-4-git-send-email-jolsa@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-03-11Merge branch 'perf/urgent' into perf/coreIngo Molnar11-27/+58
Merge the latest fixes. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-03-10perf machine: Use map as success in ip__resolve_amsDon Zickus1-1/+1
When trying to map a bunch of instruction addresses to their respective threads, I kept getting a lot of bogus entries [I forget the exact reason as I patched my code months ago]. Looking through ip__resolve_ams, I noticed the check for if (al.sym) and realized, most times I have an al.map definition but sometimes an al.sym is undefined. In the cases where al.sym is undefined, the loop keeps going even though a valid al.map exists. Modify this check to use the more reliable al.map. This fixed my bogus entries. Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1393386227-149412-2-git-send-email-dzickus@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-10perf symbols: Fix crash in elf_section_by_nameJiri Olsa1-3/+3
Fixing crash in elf_section_by_name function caused by missing section name in elf binary. Reported-by: Albert Strasheim <albert@cloudflare.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Albert Strasheim <albert@cloudflare.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@elte.hu> 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/1393767127-599-1-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-10perf trace: Decode architecture-specific signal numbersBen Hutchings1-1/+9
SIGSTKFLT is not defined on alpha, mips or sparc. SIGEMT and SIGSWI are defined on some architectures and should be decoded here if so. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Fixes: 8bad5b0abfdb ('perf trace: Beautify signal number arg in several syscalls') Cc: Ingo Molnar <mingo@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1391648441.3003.101.camel@deadeye.wl.decadent.org.uk Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-03-07perf tools: Allow building for tileZhigang Lu2-1/+10
Tested by building perf: - Cross-compiled for tile on x86_64 - Built natively on tile Signed-off-by: Zhigang Lu <zlu@tilera.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2014-02-28perf tools: Fix strict alias issue for find_first_bitJiri Olsa1-1/+3
When compiling perf tool code with gcc 4.4.7 I'm getting following error: CC util/session.o cc1: warnings being treated as errors util/session.c: In function ‘perf_session_deliver_event’: tools/perf/util/include/linux/bitops.h:109: error: dereferencing pointer ‘p’ does break strict-aliasing rules tools/perf/util/include/linux/bitops.h:101: error: dereferencing pointer ‘p’ does break strict-aliasing rules util/session.c:697: note: initialized from here tools/perf/util/include/linux/bitops.h:101: note: initialized from here make[1]: *** [util/session.o] Error 1 make: *** [util/session.o] Error 2 The aliased types here are u64 and unsigned long pointers, which is safe for the find_first_bit processing. This error shows up for me only for gcc 4.4 on 32bit x86, even for -Wstrict-aliasing=3, while newer gcc are quiet and scream here for -Wstrict-aliasing={2,1}. Looks like newer gcc changed the rules for strict alias warnings. The gcc documentation offers workaround for valid aliasing by using __may_alias__ attribute: http://gcc.gnu.org/onlinedocs/gcc-4.4.0/gcc/Type-Attributes.html Using this workaround for the find_first_bit function. Signed-off-by: Jiri Olsa <jolsa@redhat.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@elte.hu> 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/1393434867-20271-1-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-27perf tools: fix BFD detection on opensuseAndi Kleen2-2/+2
opensuse libbfd requires -lz -liberty to build. Add those to the BFD feature detection. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: David Ahern <dsahern@gmail.com> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1389469379-13340-2-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf symbols: Check compatible symtab type before loading dsoNamhyung Kim1-9/+52
When loading a dso it'll look for symbol tables of all possible types. However it's just wasted of time to check incompatible types - like trying kernel module when loading user library. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.com> 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/1392859976-32760-4-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf symbols: Check return value of filename__read_debuglink()Stephane Eranian2-2/+4
When dso__read_binary_type_filename() called, it doesn't check the return value of filename__read_debuglink() so that it'll try to open the debuglink file even if it doesn't exist. Also fix return value of the filename__read_debuglink() as it always return -1 regardless of the result. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung.kim@lge.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/1392859976-32760-3-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf symbols: Destroy unused symsrcsNamhyung Kim1-0/+2
Stephane reported that perf report and annotate failed to process data using lots of (> 500) shared libraries. It was because of the limit on number of open files (ulimit -n). Currently when perf loads a DSO, it'll look for normal and dynamic symbol tables. And if it fails to find out both tables, it'll iterate all of possible symtab types. But many of them are useless since they have no additional information and the problem is that it's not closing those files even though they're not used. Fix it. Reported-by: Stephane Eranian <eranian@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Cody P Schafer <cody@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> 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/1392859976-32760-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf annotate: Check availability of annotate when processing samplesNamhyung Kim4-19/+38
The TUI of perf report and top support annotation, but stdio and GTK don't. So it should be checked before calling hist_entry__inc_addr_ samples() to avoid wasting resources that will never be used. perf annotate need it regardless of UI and sort keys, so the check of whether to allocate resources should be on the tools that have annotate as an option in the TUI, 'report' and 'top', not on the function called by all of them. It caused perf annotate on ppc64 to produce zero output, since the buckets were not being allocated. Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Anton Blanchard <anton@samba.org> Cc: Ingo Molnar <mingo@kernel.org> 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/1392859976-32760-1-git-send-email-namhyung@kernel.org [ Renamed (report,top)__needs_annotate() to ui__has_annotation() ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf tests: Add NO_LIBDW_DWARF_UNWIND make testJiri Olsa1-0/+3
Adding make test for NO_LIBDW_DWARF_UNWIND option, plus updating minimal build test with it. Signed-off-by: Jiri Olsa <jolsa@redhat.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: Jean Pihet <jean.pihet@linaro.org> 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/1392825179-5228-7-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf tools: Setup default dwarf post unwinderJiri Olsa3-23/+66
Factor NO_LIBDW_DWARF_UNWIND makefile variable and code that selects default DWARf post unwinder based on detected features (libdw and libunwind support) If both are detected the libunwind is selected as default. Simple 'make' will try to add: - libunwind unwinder if present - libdw unwinder if present - disable dwarf unwind if non of libunwind and libdw libraries are present If one of the DWARF unwind libraries is detected, message is displayed which one (libunwind/libdw) is compiled in. Examples: - compile in libdw unwinder if present: $ make NO_LIBUNWIND=1 - compile in libdw (with libdw installation directory) unwinder if present: $ make LIBDW_DIR=/opt/elfutils/ NO_LIBUNWIND=1 BUILD: Doing 'make -j4' parallel build Auto-detecting system features: ... dwarf: [ on ] ... glibc: [ on ] ... gtk2: [ on ] ... libaudit: [ on ] ... libbfd: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... libperl: [ on ] ... libpython: [ on ] ... libslang: [ on ] ... libunwind: [ on ] ... libdw-dwarf-unwind: [ on ] ... DWARF post unwind library: libdw - disable post dwarf unwind completely: $ make NO_LIBUNWIND=1 NO_LIBDW_DWARF_UNWIND=1 BUILD: Doing 'make -j4' parallel build Auto-detecting system features: ... dwarf: [ on ] ... glibc: [ on ] ... gtk2: [ on ] ... libaudit: [ on ] ... libbfd: [ on ] ... libelf: [ on ] ... libnuma: [ on ] ... libperl: [ on ] ... libpython: [ on ] ... libslang: [ on ] ... libunwind: [ on ] ... libdw-dwarf-unwind: [ on ] ... DWARF post unwind library: libunwind Signed-off-by: Jiri Olsa <jolsa@redhat.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: Jean Pihet <jean.pihet@linaro.org> 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/1392825179-5228-6-git-send-email-jolsa@redhat.com [ Add suggestion about setting LIBDW_DIR when not finding libdw ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf tools: Add libdw DWARF post unwind supportJiri Olsa6-0/+297
Adding libdw DWARF post unwind support, which is part of elfutils-devel/libdw-dev package from version 0.158. The new code is contained in unwin-libdw.c object, and implements unwind__get_entries unwind interface function. New Makefile variable NO_LIBDW_DWARF_UNWIND was added to control its compilation, and is marked as disabled now. It's factored with the rest of the Makefile unwind build code in the next patch. Arch specific code was added for x86. Signed-off-by: Jiri Olsa <jolsa@redhat.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: Jean Pihet <jean.pihet@linaro.org> 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/1392825179-5228-5-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf tools: Add feature check for libdw dwarf unwindJiri Olsa4-8/+35
Adding feature check test code for libdw dwarf unwind. Signed-off-by: Jiri Olsa <jolsa@redhat.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: Jean Pihet <jean.pihet@linaro.org> 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/1392825179-5228-4-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-02-24perf tools: Warn the user about how to enable libunwind supportArnaldo Carvalho de Melo1-1/+1
When one has libunwind installed somewhere the perf tools build process doesn't expects it to be, this happens: [acme@ssdandy linux]$ make O=/tmp/build/perf -C tools/perf/ install-bin make: Entering directory `/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j8' parallel build config/Makefile:312: No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 1.1 Auto-detecting system features: <SNIP> ... libunwind: [ OFF ] Change the message so that it tells how to use a non-standard libunwind install directory: config/Makefile:312: No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR [acme@ssdandy linux]$ make LIBUNWIND_DIR=/opt/libunwind-git/ O=/tmp/build/perf -C tools/perf/ install-bin make: Entering directory `/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j8' parallel build Auto-detecting system features: <SNIP> ... libunwind: [ on ] Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: 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: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-huoxnou7sw85lm58k3pi1xhw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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