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2010-09-20perf: Initialize callchains roots's childen hitsFrederic Weisbecker
commit 5225c45899e872383ca39f5533d28ec63c54b39e upstream. Each histogram entry has a callchain root that stores the callchain samples. However we forgot to initialize the tracking of children hits of these roots, which then got random values on their creation. The root children hits is multiplied by the minimum percentage of hits provided by the user, and the result becomes the minimum hits expected from children branches. If the random value due to the uninitialization is big enough, then this minimum number of hits can be huge and eventually filter every children branches. The end result was invisible callchains. All we need to fix this is to initialize the children hits of the root. Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-07-23Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not available perf annotate: Fix handling of goto labels that are valid hex numbers tracing: Properly align linker defined symbols perf symbols: Fix directory descriptor leaking perf: Fix various display bugs with parent filtering
2010-07-22perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not ↵Conny Seidel
available make version 3.80 doesn't support "else ifdef" on the same line, also it doesn't support unindented nested constructs. Build fails with: Makefile:608: Extraneous text after `else' directive Makefile:611: *** only one `else' per conditional. Stop. This patch fixes the build for make 3.80. Cc: Ingo Molnar <mingo@elte.hu>, Cc: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <1278430783-17259-1-git-send-email-conny.seidel@amd.com> Signed-off-by: Conny Seidel <conny.seidel@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-07-22perf annotate: Fix handling of goto labels that are valid hex numbersArnaldo Carvalho de Melo
When parsing the objdump disassembly output we can have goto labels that are valid hex numbers and thus get confused with lines with machine code. Handle the common case of a label that has nothing after it and other cases where there is just source code by validating the resulting "ip". It is still possible that we find goto labels that are in the function address range, but only if they are located before the real address we should be OK. A change in the objdump output to have a clear marker separating addresses from the disassembly would come handy, but we would still have to deal with older versions. Reported-by: Gleb Natapov <gleb@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100722170541.GF17631@ghostprotocols.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-07-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: math-emu: correct test for downshifting fraction in _FP_FROM_INT() perf: Add DWARF register lookup for sparc MAINTAINERS: Add SBUS driver path to sparc entry. drivers/sbus: Remove unnecessary casts of private_data sparc: remove homegrown L1_CACHE_ALIGN macro sparc64: fix the build error due to smp_kgdb_capture_client() sparc64: Fix maybe_change_configuration() PCR setting. arch/sparc/kernel: Eliminate what looks like a NULL pointer dereference sparc64: Update defconfig. sunsu: Fix use after free in su_remove(). sunserial: Don't call add_preferred_console() when console= is specified. sparc32: Kill none_mask, it's bogus.
2010-07-16perf symbols: Fix directory descriptor leakingGui Jianfeng
When I ran "perf kvm ... top", I encountered the following error output. Error: perfcounter syscall returned with -1 (Too many open files) Fatal: No CONFIG_PERF_EVENTS=y kernel support configured? Looking into perf, I found perf opens too many directories at initialization time, but forgets to close them. Here is the fix. LKML-Reference: <4C230362.5080704@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-07-16perf: Fix various display bugs with parent filteringFrederic Weisbecker
Hists that have been filtered, because they don't have callchains matching the parent filter, won't be printed. As such, hist_entry__snprintf() returns 0 for them, but we don't control this value and we always print the buffer, which might be untouched and then only made of random stack garbage. Not only does it paint the screen with barf, it also prints the callchains for these hists, even though they have been filtered, since the hist has been filtered as well. We need to check the return value of hist_entry__snprintf() and ignore the hist if it is 0, which means it didn't get any callchain matching the parent filter. This fixes the barf and the undesired callchains. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
2010-07-14perf: Add DWARF register lookup for sparcDavid S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-08perf: Sync callchains with period based hitsFrederic Weisbecker
Hists have their hits increased by the event period. And this period based counting is the foundation of all the stats in perf report. But callchains still use the raw number of hits, without taking the period into account. So when we compute the percentage, absolute based percentages are totally broken, and relative ones too in the first parent level. Because we pass the number of events muliplied by their period as the total number of hits to the callchain filtering, while callchains expect this number to be the number of raw hits. perf report -g graph was simply not working, showing no graph unless the min percent was zero. And even there the percentage of the branches was always 0. And may be fractal filtering was broken on the first branch level too. flat also was broken, but it was hidden because of other breakages. Anyway fix this by counting using periods on callchains. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org>
2010-07-08perf: Resurrect flat callchainsFrederic Weisbecker
Initialize the callchain radix tree root correctly. When we walk through the parents, we must stop after the root, but since it wasn't well initialized, its parent pointer was random. Also the number of hits was random because uninitialized, hence it was part of the callchain while the root doesn't contain anything. This fixes segfaults and percentages followed by empty callchains while running: perf report -g flat Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: 2.6.31.x-2.6.34.x <stable@kernel.org>
2010-07-05perf: Version String fix, for fallback if not from gitThavidu Ranatunga
This gets rid of the default version fallback for Perf and changes it so that it returns the version of the kernel from it's Makefile (if sources were not from git, ie. if it was downloaded from a tarball) Signed-off-by: Thavidu Ranatunga <tharan@au1.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1278316815-6099-2-git-send-email-tharan@au1.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-07-05perf: Version String fix, using kernel versionThavidu Ranatunga
Changes the Perf --version string such that it shows the kernel version as suggested by Ingo as follows: That way the perf that comes with v2.6.34 will be: perf version v2.6.34 while interim versions will have the version of the interim kernel - for example: perf version v2.6.35-rc4-70-g39ef13a This functionality was already in the perf version generator file except that it was looking for a .git in the perf directory instead of the kernel directory. Signed-off-by: Thavidu Ranatunga <tharan@au1.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <1278316815-6099-1-git-send-email-tharan@au1.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-07-01perf tools: Fix find tids routine by excluding "." and ".."Gui Jianfeng
Introduce a filter function to skip "." and ".." directories when calculating tid number, otherwise tid 0 will be included in the all_tid result array. Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <4C185F68.1020505@cn.fujitsu.com> Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-17perf record: prevent kill(0, SIGTERM);Ian Munsie
At exit, perf record will kill the process it was profiling by sending a SIGTERM to child_pid (if it had been initialised), but in certain situations child_pid may be 0 and perf would mistakenly kill more processes than intended. child_pid is set to the return of fork() to either 0 or the pid of the child. Ordinarily this would not present an issue as the child calls execvp to spawn the process to be profiled and would therefore never run it's sig_atexit and never attempt to kill pid 0. However, if a nonexistant binary had been passed in to perf record the call to execvp would fail and child_pid would be left set to 0. The child would then exit and it's atexit handler, finding that child_pid was initialised to 0, would call kill(0, SIGTERM), resulting in every process within it's process group being killed. In the case that perf was being run directly from the shell this typically would not be an issue as the shell isolates the process. However, if perf was being called from another program it could kill unexpected processes, which may even include X. This patch changes the logic of the test for whether child_pid was initialised to only consider positive pids as valid, thereby never attempting to kill pid 0. Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <1276072680-17378-1-git-send-email-imunsie@au1.ibm.com> Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-17perf session: Remove threads from tree on PERF_RECORD_EXITArnaldo Carvalho de Melo
Move them to a session->dead_threads list just like we do with maps that are replaced, because we may have hist_entries pointing to them. This fixes a bug when inserting maps for a new thread that reused the TID, mixing maps for two different threads, causing an endless loop. The code for insering maps should be made more robust but for .35 this is the minimalistic patch. Reported-by: Ingo Molnar <mingo@elte.hu> Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-10perf record: Don't call newt functions when not initializedArnaldo Carvalho de Melo
When processing events we want to give visual feedback to the user when using the newt browser, so there are ui_progress calls in __perf_session__process_events, but those should check if newt is being used. Reported-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>, Cc: Peter Zijlstra <peterz@infradead.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20100609123530.GB9471@ghostprotocols.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-04perf symbols: Set the DSO long name when using symbol_conf.vmlinux_nameArnaldo Carvalho de Melo
We need to set the long name to the name specified via, for instance, 'perf annotate --vmlinux /path/to/vmlinux', if not it will remain as '[kernel.kallsyms]' and that will make annotate fail when passing this as the vmlinux name in the call to objdump. The way this is setup grew unwieldly and dso__load_vmlinux is the function that should allocate space for the long name, with callers not assuming that filenames should be allocated somehow by then (strdup, dso__build_id_filename, etc). For now this is the minimalistic patch, a proper fix for .36 will be made. Reported-by: Stephane Eranian <eranian@google.com> Tested-by: Stephane Eranian <eranian@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20100604003900.GD10469@ghostprotocols.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-02Merge branch 'perf/urgent' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/urgent
2010-06-01perf buildid-list: Fix --with-hits event processingArnaldo Carvalho de Melo
When we use plain 'perf buildid-list' we use only what is in the buildid table in the perf.data header. And those have absolute pathnames because at 'perf record' time we used __perf_session__process_events and that doesn't sets up the path shortening code in map__new() that happens if symbol_conf.full_paths is false, the default. On the other hand, when we use 'perf buildid-list --with-hits' we process all the events using perf_session__process_events, adding entries to the global DSO list _after_ removing the current directory from the DSO name, for presentation purposes. Because of that we end up having two entries in the DSO list when recording events for binaries using relative pathnames. Fix it minimally by setting symbol_conf.full_paths to true when marking the DSOs with hits in 'perf buildid-list --with-hits', as used by 'perf archive' Right fix longer term is to shorten the path only at presentation time. Will be done for 2.6.36. Reported-by: Stephane Eranian <eranian@google.com> Tested-by: Stephane Eranian <eranian@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <20100601183837.GC4093@ghostprotocols.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-01perf scripts python: Give field dict to unhandled callbackPierre Tardy
trace_unhandled() callback does not allow to access event fields, this patch resolves the problem. It can also been used as a more pythonic and flexible way for script writters to demux event types This will for example greatly simplify pytimechart event demux. Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu>, Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <1275340329-2397-1-git-send-email-tardyp@gmail.com> Signed-off-by: Pierre Tardy <tardyp@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-01perf hist: fix objdump output parsingKonstantin Stepanyuk
hist_entry__annotate() runs objdump with -S option so the output may contain lines of any format. If a line starts with a colon strtoull() returns 0 and calculated offset will be negative. This causes perf annotate segfaults. Make sure that strtoull() has parsed at least one digit. Cc: David S. Miller <davem@davemloft.net> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-06-01perf-record: Check correct pid when forkingBorislav Petkov
When forking the child to be traced, we should check the correct return value from fork() and not a local variable which is otherwise unused. Signed-off-by: Borislav Petkov <bp@alien8.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100531211818.GA30175@liondog.tnic> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-06-01perf: Do the comm inheritance per thread in event__process_taskFrederic Weisbecker
event__process_task() doesn't propagate the comm copy on clone, but only on process fork. So we loose all the tid:comm resolution for tasks that aren't a main process thread. Progragate the per thread granularity to event__process_task for pid resolution. This fixes various unresolved pids in perf sched, especially when we trace multithread processes. The problem is quickly reproducible with the messaging benchmark using the multithread mode "-t" : perf sched record perf bench sched messaging -t Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Stephane Eranian <eranian@google.com>
2010-06-01perf: Use event__process_task from perf schedFrederic Weisbecker
perf sched uses event__process_comm(), which means it can resolve comms from: - tasks that have exec'ed (kernel comm events) - tasks that were running when perf record started the actual recording (synthetized comm events) But perf sched can't resolve the pids of tasks that were created after the recording started. To solve this, we need to inherit the comms on fork events using event__process_task(). This fixes various unresolved pids in perf sched, easily visible with: perf sched record perf bench sched messaging Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Stephane Eranian <eranian@google.com>
2010-05-31perf: Process comm events by tidFrederic Weisbecker
When we synthetize the existing running tasks though procfs, we walk through every threads of a process, queuing one comm events per tid. But then on report time, event__process_comm() only creates and sets the comm on a per process granularity. This is the right thing for comm events that came from the kernel, as they are only created on exec. Sub-threads then inherit their comm from fork events. But that doesn't work with our synthetized comm events taken from procfs informations as the per thread granularity is done on comm events directly there. Hence we need event__process_comm() to work with the tid rather than the pid. It won't change anything for comm events coming from the kernel but this will fix the synthetized ones. Before: $ ./perf report -D | grep COMM | grep firefox 0x2c7b8 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c7d0 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c7e8 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c800 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c818 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c830 [0x18]: PERF_RECORD_COMM: firefox:5297 After: $ ./perf report -D | grep COMM | grep firefox 0x2c7b8 [0x18]: PERF_RECORD_COMM: firefox:5297 0x2c7d0 [0x18]: PERF_RECORD_COMM: firefox:5299 0x2c7e8 [0x18]: PERF_RECORD_COMM: firefox:5300 0x2c800 [0x18]: PERF_RECORD_COMM: firefox:5308 0x2c818 [0x18]: PERF_RECORD_COMM: firefox:5309 0x2c830 [0x18]: PERF_RECORD_COMM: firefox:5312 This fixes various unresolved pid on perf sched. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Stephane Eranian <eranian@google.com>
2010-05-30Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf tui: Fix last use_browser problem related to .perfconfig perf symbols: Add the build id cache to the vmlinux path perf tui: Reset use_browser if stdout is not a tty ring-buffer: Move zeroing out excess in page to ring buffer code ring-buffer: Reset "real_end" when page is filled
2010-05-27Merge branch 'perf-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (61 commits) tracing: Add __used annotation to event variable perf, trace: Fix !x86 build bug perf report: Support multiple events on the TUI perf annotate: Fix up usage of the build id cache x86/mmiotrace: Remove redundant instruction prefix checks perf annotate: Add TUI interface perf tui: Remove annotate from popup menu after failure perf report: Don't start the TUI if -D is used perf: Fix getline undeclared perf: Optimize perf_tp_event_match() perf: Remove more code from the fastpath perf: Optimize the !vmalloc backed buffer perf: Optimize perf_output_copy() perf: Fix wakeup storm for RO mmap()s perf-record: Share per-cpu buffers perf-record: Remove -M perf: Ensure that IOC_OUTPUT isn't used to create multi-writer buffers perf, trace: Optimize tracepoints by using per-tracepoint-per-cpu hlist to track events perf, trace: Optimize tracepoints by removing IRQ-disable from perf/tracepoint interaction perf tui: Allow disabling the TUI on a per command basis in ~/.perfconfig ...
2010-05-27perf tui: Fix last use_browser problem related to .perfconfigArnaldo Carvalho de Melo
When we moved to using ~/.perfconfig to set the value of use_browser, it changed from a boolean to an int so that the convention used for use_pager was followed. That convention is: -1: unspecified, that is what use_{browser,pager} is initialized 0: Don't use the browser (should be TUI), because was explicitely set to 0/off/false on ~/.perfconfig [tui] cmd =, or because we're redirecting the stdout to a file or piping it to some other command (!isatty()). 1: Use the TUI Some code was not properly audited and continued testing it as a boolean, this seems to be the last one. Reported-by: Frédéric Weisbecker <fweisbec@gmail.com> Tested-by: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-26perf symbols: Add the build id cache to the vmlinux pathArnaldo Carvalho de Melo
So that if the kernel DSO has a build id because record inserted it in the perf.data build id table in the header, or a BUILD_ID event was inserted in the stream, we first look at the build id cache ($HOME/.debug/). If we find it there, try to use it, allowing offline annotation in addition to 'perf report'. Reported-by: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-26perf tui: Reset use_browser if stdout is not a ttyArnaldo Carvalho de Melo
The newt initialization routines weren't being called because the output was a file (perf annotate > /tmp/bla) but use_browser was still 1, because ~/.perfconfig had it as 'on', so, later on newt routines segfaulted. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-23perf report: Support multiple events on the TUIArnaldo Carvalho de Melo
The hists__tty_browse_tree function was created with the loop to print all events, and its equivalent, hists__tui_browse_tree, was created in a similar fashion, where it is possible to switch among the multiple events, if present, using TAB to go the next event, and shift+TAB (UNTAB) to go to the previous. The report TUI now shows as the window title the name of the event and a leak was fixed wrt pstacks. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-23perf annotate: Fix up usage of the build id cacheArnaldo Carvalho de Melo
It was assuming that the cache was always available and also wasn't checking if the file found in the build id cache was just a kallsyms file, that is not supported by objdump for disassembly. Reported-by: Ingo Molnar <mingo@elte.hu> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-22perf annotate: Add TUI interfaceArnaldo Carvalho de Melo
When annotating multiple entries, for instance, when running simply as: $ perf annotate the right and left keys, as well as TAB can be used to cycle thru the multiple symbols being annotated. If one doesn't like TUI annotate, disable it by editing ~/.perfconfig and adding: [tui] annotate = off Just like it is possible for report. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-22perf tui: Remove annotate from popup menu after failureArnaldo Carvalho de Melo
Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-21perf report: Don't start the TUI if -D is usedArnaldo Carvalho de Melo
One day we'll have support for the "dump raw trace in ASCII" in the TUI frontend, but till then, use the tty code. Reported-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-21perf: Fix getline undeclaredFrederic Weisbecker
We need to have stdio.h included with _GNU_SOURCEfopr getline, which is broken with the inclusion of build-id.h. Keep util.h included first in hist.c Fixes: util/hist.c: Dans la fonction «hist_entry__parse_objdump_line» : util/hist.c:938: attention : déclaration implicite de la fonction « «getline» » util/hist.c:938: attention : nested extern declaration of «getline» make: *** [util/hist.o] Erreur 1 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1274438919-5104-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21perf-record: Share per-cpu buffersPeter Zijlstra
It seems a waste of space to create a buffer per event, share it per-cpu. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.634824884@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21perf-record: Remove -MPeter Zijlstra
Since it is not allowed to create cross-cpu (or cross-task) buffers, this option is no longer valid. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <20100521090710.582740993@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-05-21Merge branch 'perf' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core
2010-05-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (229 commits) USB: remove unused usb_buffer_alloc and usb_buffer_free macros usb: musb: update gfp/slab.h includes USB: ftdi_sio: fix legacy SIO-device header USB: kl5usb105: reimplement using generic framework USB: kl5usb105: minor clean ups USB: kl5usb105: fix memory leak USB: io_ti: use kfifo to implement write buffering USB: io_ti: remove unsused private counter USB: ti_usb: use kfifo to implement write buffering USB: ir-usb: fix incorrect write-buffer length USB: aircable: fix incorrect write-buffer length USB: safe_serial: straighten out read processing USB: safe_serial: reimplement read using generic framework USB: safe_serial: reimplement write using generic framework usb-storage: always print quirks USB: usb-storage: trivial debug improvements USB: oti6858: use port write fifo USB: oti6858: use kfifo to implement write buffering USB: cypress_m8: use kfifo to implement write buffering USB: cypress_m8: remove unused drain define ... Fix up conflicts (due to usb_buffer_alloc/free renaming) in drivers/input/tablet/acecad.c drivers/input/tablet/kbtab.c drivers/input/tablet/wacom_sys.c drivers/media/video/gspca/gspca.c sound/usb/usbaudio.c
2010-05-20perf tui: Allow disabling the TUI on a per command basis in ~/.perfconfigArnaldo Carvalho de Melo
Using the same scheme as for git's/perf's pager setup, i.e. if one doesn't want to, on a newt enabled perf binary, to disable the TUI for 'perf report', its just a matter of doing: [root@doppio linux-2.6-tip]# printf "[tui]\n\nreport = off\n" > /root/.perfconfig [root@doppio linux-2.6-tip]# cat /root/.perfconfig [tui] report = off [root@doppio linux-2.6-tip]# System wide settings are also possible, by editing /etc/perfconfig, etc, i.e. the git machinery for config files applies to perf as well, so when in doubt where to put your settings, consult the git documentation, if it fails, please let us know. Suggested-by: Ingo Molnar <mingo@elte.hu> Discussed-with: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf record: remove unneeded gettimeofday() callRuss Anderson
Perf record repeatedly calls gettimeofday() which adds noise to the performance measurements. Since gettimeofday() is only used for the error printf, delete it. Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100518225240.GC25589@sgi.com> Signed-off-by: Russ Anderson <rja@sgi.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20USB: testusb: testusb compatibility with FunctionFS gadgetMichal Nazarewicz
The FunctionFS gadget may provide the source/sink interface not as the first interface (with id == 0) but some different interface hence a code to find the interface number is required. (Note that you will still configure the gadget to report idProduct == 0xa4a4 (an "echo 0xa4a4 >/sys/module/g_ffs/parameters/usb_product" should suffice) or configure host to handle 0x0525:0xa4ac devices using the usbtest driver.) Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-20USB: testusb: an USB testing applicationDavid Brownell
The testusb program just issues ioctls to perform the tests implemented by the kernel driver. It can generate a variety of transfer patterns; you should make sure to test both regular streaming and mixes of transfer sizes (including short transfers). For more information on how this can be used and on USB testing refer to <URL:http://www.linux-usb.org/usbtest/>. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-20USB: ffs-test: FunctionFS testing programMichal Nazarewicz
This adds an example user-space FunctionFS driver which implements a source/sink interface used for testing. Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-05-20perf annotate: Use build-ids to find the right DSOArnaldo Carvalho de Melo
We were still using the pathname found on the MMAP event, that could not be the one we used when recording, so use the build-id cache for that, only falling back to use the pathname in the MMAP event if no build-ids are available. With this we now also are able to do secure, seamless offline annotation. Example: [root@doppio linux-2.6-tip]# perf report -g none -v 2> /dev/null | head -10 8.12% Xorg /usr/lib64/libpixman-1.so.0.14.0 0x0000000000026d02 B [.] pixman_rasterize_edges 4.68% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x00000000005dbdba B [.] 0x000000005dbdba 3.70% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.96% init /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff81022cea ! [k] read_hpet 2.73% swapper /lib/modules/2.6.34-rc6/build/vmlinux 0xffffffff8100a738 ! [k] mwait_idle_with_hints [root@doppio linux-2.6-tip]# perf annotate -v pixman_rasterize_edges 2>&1 | grep Executing Executing: objdump --start-address=0x000000371ce26670 --stop-address=0x000000371ce2709f -dS /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|grep -v /root/.debug/.build-id/bd/6ac5199137aaeb279f864717d8d061477466c1|expand [root@doppio linux-2.6-tip]# perf buildid-list | grep libpixman-1.so.0.14.0 bd6ac5199137aaeb279f864717d8d061477466c1 /usr/lib64/libpixman-1.so.0.14.0 [root@doppio linux-2.6-tip]# Reported-by: Stephane Eranian <eranian@google.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20perf TUI: Make 'space' be an alias to 'PgDn'Arnaldo Carvalho de Melo
Just like if one is using the stdio based pager, or more/less, for that matter. Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-05-20Merge branch 'perf/urgent' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
2010-05-20perf: Fix unaligned accesses while fetching trace valuesFrederic Weisbecker
Accessing trace values of an 8 size may end up in a segfault on archs that can't deal with misaligned access, which is the case for sparc 64. This is because PERF_SAMPLE_RAW are aligned to 4 and not to 8. Fix this on the macros that get the values of 8 size. This fixes segfaults on perf tools in sparc 64. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: David Miller <davem@davemloft.net>
2010-05-20perf: Use read() instead of lseek() in trace_event_read.c:skip()Tom Zanussi
This is a small fix for a problem affecting live-mode, introduced recently: root@tropicana:~# perf trace rwtop perf trace started with Perl script /root/libexec/perf-core/scripts/perl/rwtop.pl Fatal: did not read header event commit d00a47cce569a3e660a8c9de5d57af28d6a9f0f7 added a skip() function to skip over e.g. header_page, but this doesn't work for live mode. This patch re-implements skip() to use read() instead of lseek() to fix that. Signed-off-by: Tom Zanussi <tzanussi@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1273032130.6383.28.camel@tropicana> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>