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2010-01-29perf session: Create kernel maps in the constructorArnaldo Carvalho de Melo
Removing one extra step needed in the tools that need this, fixing a bug in 'perf probe' where this was not being done. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264633557-17597-4-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf symbols: Split helpers used when creating kernel dso objectArnaldo Carvalho de Melo
To make it clear and allow for direct usage by, for instance, regression test suites. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264633557-17597-3-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf symbols: Factor out dso__load_vmlinux_path()Arnaldo Carvalho de Melo
So that we can call it directly from regression tests, and also to reduce the size of dso__load_kernel_sym(), making it more clear. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264633557-17597-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf top: Exit if specified --vmlinux can't be usedArnaldo Carvalho de Melo
As we do lazy loading of symtabs we only will know if the specified vmlinux file is invalid when we actually have a hit in kernel space and then try to load it. So if we get kernel hits and there are _no_ symbols in the DSO backing the kernel map, bail out. Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264633557-17597-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events: Fix sample_period transfer on inheritPeter Zijlstra
One problem with frequency driven counters is that we cannot predict the rate at which they trigger, therefore we have to start them at period=1, this causes a ramp up effect. However, if we fail to propagate the stable state on fork each new child will have to ramp up again. This can lead to significant artifacts in sample data. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: eranian@google.com Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1264752266.4283.2121.camel@laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events, x86: Remove spurious counter reset from x86_pmu_enable()Peter Zijlstra
At enable time the counter might still have a ->idx pointing to a previously occupied location that might now be taken by another event. Resetting the counter at that location with data from this event will destroy the other counter's count. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.261477183@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events, x86: Implement Intel Westmere supportPeter Zijlstra
The new Intel documentation includes Westmere arch specific event maps that are significantly different from the Nehalem ones. Add support for this generation. Found the CPUID model numbers on wikipedia. Also ammend some Nehalem constraints, spotted those when looking for the differences between Nehalem and Westmere. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.151865645@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events, x86: Clean up hw_perf_*_all() implementationPeter Zijlstra
Put the recursion avoidance code in the generic hook instead of replicating it in each implementation. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221122.057507285@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events, x86: Fix event constraint masksPeter Zijlstra
Since constraints are specified on the event number, not number and unit mask shorten the constraint masks so that we'll actually match something. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100127221121.967610372@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Deduplicate the disable codePeter Zijlstra
Share the meat of the x86_pmu_disable() code with hw_perf_enable(). Also remove the barrier() from that code, since I could not convince myself we actually need it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf, x86: Clean up event constraints code a bitIngo Molnar
- Remove stray debug code - Improve ugly macros a bit - Remove some whitespace damage - (Also fix up some accumulated damage in perf_event.h) Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Stephane Eranian <eranian@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission>
2010-01-29perf_event: x86: Optimize x86_pmu_disable()Peter Zijlstra
x86_pmu_disable() removes the event from the cpuc->event_list[], however since an event can only be on that list once, stop looking after we found it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Optimize the fast path a little morePeter Zijlstra
Remove num from the fast path and save a few ops. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155536.056430539@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Optimize constraint weight computationPeter Zijlstra
Add a weight member to the constraint structure and avoid recomputing the weight at runtime. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.963944926@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Optimize the constraint searching bitsPeter Zijlstra
Instead of copying bitmasks around, pass pointers to the constraint structure. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.887853503@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29bitops: Provide compile time HWEIGHT{8,16,32,64}Peter Zijlstra
Provide compile time versions of hweight. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <20100122155535.797688466@chello.nl> [ Remove some whitespace damage while we are at it ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Reduce some overly long lines with some MACROsPeter Zijlstra
Introduce INTEL_EVENT_CONSTRAINT and FIXED_EVENT_CONSTRAINT to reduce some line length and typing work. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.688730371@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Clean up some of the u64/long bitmask castingPeter Zijlstra
We need this to be u64 for direct assigment, but the bitmask functions all work on unsigned long, leading to cast heaven, solve this by using a union. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.595961269@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Fixup constraints typing issuePeter Zijlstra
Constraints gets defined an u64 but in long quantities and then cast to long. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.504916780@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_event: x86: Allocate the fake_cpucPeter Zijlstra
GCC was complaining the stack usage was too large, so allocate the structure. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <20100122155535.411197266@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events: Add fast-path to the rescheduling codeStephane Eranian
Implement correct fastpath scheduling, i.e., reuse previous assignment. Signed-off-by: Stephane Eranian <eranian@google.com> [ split from larger patch] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <4b588464.1818d00a.4456.383b@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29perf_events, x86: Improve x86 event schedulingStephane Eranian
This patch improves event scheduling by maximizing the use of PMU registers regardless of the order in which events are created in a group. The algorithm takes into account the list of counter constraints for each event. It assigns events to counters from the most constrained, i.e., works on only one counter, to the least constrained, i.e., works on any counter. Intel Fixed counter events and the BTS special event are also handled via this algorithm which is designed to be fairly generic. The patch also updates the validation of an event to use the scheduling algorithm. This will cause early failure in perf_event_open(). The 2nd version of this patch follows the model used by PPC, by running the scheduling algorithm and the actual assignment separately. Actual assignment takes place in hw_perf_enable() whereas scheduling is implemented in hw_perf_group_sched_in() and x86_pmu_enable(). Signed-off-by: Stephane Eranian <eranian@google.com> [ fixup whitespace and style nits as well as adding is_x86_event() ] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <4b5430c6.0f975e0a.1bf9.ffff85fe@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-29x86/hw-breakpoints: Optimize return code from notifier chain in ↵K.Prasad
hw_breakpoint_handler Processing of debug exceptions in do_debug() can stop if it originated from a hw-breakpoint exception by returning NOTIFY_STOP in most cases. But for certain cases such as: a) user-space breakpoints with pending SIGTRAP signal delivery (as in the case of ptrace induced breakpoints). b) exceptions due to other causes than breakpoints We will continue to process the exception by returning NOTIFY_DONE. Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Jan Kiszka <jan.kiszka@siemens.com> LKML-Reference: <20100128111415.GC13935@in.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-01-29x86/debug: Clear reserved bits of DR6 in do_debug()K.Prasad
Clear the reserved bits from the stored copy of debug status register (DR6). This will help easy bitwise operations such as quick testing of a debug event origin. Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com> Cc: Roland McGrath <roland@redhat.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <20100128111401.GB13935@in.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-01-29tracing/kprobe: Cleanup unused return value of tracing functionsXiao Guangrong
The return values of the kprobe's tracing functions are meaningless, lets remove these. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Jason Baron <jbaron@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <4B60E9A3.2040505@cn.fujitsu.com> [fweisbec@gmail: whitespace fixes, drop useless void returns in end of functions] Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-01-29perf: Factorize trace events raw sample buffer operationsXiao Guangrong
Introduce ftrace_perf_buf_prepare() and ftrace_perf_buf_submit() to gather the common code that operates on raw events sampling buffer. This cleans up redundant code between regular trace events, syscall events and kprobe events. Changelog v1->v2: - Rename function name as per Masami and Frederic's suggestion - Add __kprobes for ftrace_perf_buf_prepare() and make ftrace_perf_buf_submit() inline as per Masami's suggestion - Export ftrace_perf_buf_prepare since modules will use it Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Acked-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Jason Baron <jbaron@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <4B60E92D.9000808@cn.fujitsu.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-01-28perf: Fix inconsistency between IP and callchain samplingAnton Blanchard
When running perf across all cpus with backtracing (-a -g), sometimes we get samples without associated backtraces: 23.44% init [kernel] [k] restore 11.46% init eeba0c [k] 0x00000000eeba0c 6.77% swapper [kernel] [k] .perf_ctx_adjust_freq 5.73% init [kernel] [k] .__trace_hcall_entry 4.69% perf libc-2.9.so [.] 0x0000000006bb8c | |--11.11%-- 0xfffa941bbbc It turns out the backtrace code has a check for the idle task and the IP sampling does not. This creates problems when profiling an interrupt heavy workload (in my case 10Gbit ethernet) since we get no backtraces for interrupts received while idle (ie most of the workload). Right now x86 and sh check that current is not NULL, which should never happen so remove that too. Idle task's exclusion must be performed from the core code, on top of perf_event_attr:exclude_idle. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> LKML-Reference: <20100118054707.GT12666@kryten> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-01-27perf trace: Add -i option for choosing input fileHitoshi Mitake
perf trace lacks -i option for choosing input file. This patch adds it to perf trace. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1264167929-6741-1-git-send-email-mitake@dcl.info.waseda.ac.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-27perf symbols: Use the right variable to check for kallsyms in the cacheArnaldo Carvalho de Melo
Probably this wasn't noticed when testing this on my parisc machine because I must have copied manually to its cache the vmlinux file used in the x86_64 machine, now that I tried looking on a x86-32 machine with a fresh cache, kernel symbols weren't being resolved even with the right kallsyms copy on its cache, duh. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264178102-4203-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-27perf symbols: Fix inverted logic for showing kallsyms as the source of symbolsArnaldo Carvalho de Melo
Only if we parsed /proc/kallsyms (or a copy found in the buildid cache) we should set the dso long name to "[kernel.kallsyms]". Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264178102-4203-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-27perf top: Handle PERF_RECORD_{FORK,EXIT} eventsArnaldo Carvalho de Melo
As noticed by Mike, symbols in new tasks were not being processed as we weren't processing these events. Reported-by: Mike Galbraith <efault@gmx.de> Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264086284-1431-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-27perf top: Fix sample countingArnaldo Carvalho de Melo
Broken since "5b2bb75 perf top: Support userspace symbols too". Reported-by: Mike Galbraith <efault@gmx.de> Tested-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264086284-1431-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-27perf: Reimplement frequency driven samplingPeter Zijlstra
There was a bug in the old period code that caused intel_pmu_enable_all() or native_write_msr_safe() to show up quite high in the profiles. In staring at that code it made my head hurt, so I rewrote it in a hopefully simpler fashion. Its now fully symetric between tick and overflow driven adjustments and uses less data to boot. The only complication is that it basically wants to do a u128 division. The code approximates that in a rather simple truncate until it fits fashion, taking care to balance the terms while truncating. This version does not generate that sampling artefact. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-21perf buildid-cache: Add new command to manage build-id cacheArnaldo Carvalho de Melo
For now it just has operations to examine a given file, find its build-id and add or remove it to/from the cache. Useful, for instance, when adding binaries sent together with a perf.data file, so that we can add them to the cache and have the tools find it when resolving symbols. It'll also manage the size of the cache like 'ccache' does. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1264008525-29025-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20perf symbols: Use only --vmlinux if specifiedArnaldo Carvalho de Melo
Found while analysing a perf.data file collected on an ARM machine where an explicitely specified vmlinux was being disregarded. Reported-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1263904574-30732-2-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20perf symbols: Set dso->kernel when handling the fake vmlinux MMAP eventArnaldo Carvalho de Melo
Because it may be possible that there was no buildid section, where we would set this to 1. Found while analysing a perf.data file collected on an ARM machine where an explicitely specified vmlinux was being disregarded. Reported-by: Jamie Iles <jamie.iles@picochip.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1263904574-30732-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20perf archive: Fix installation steps in the MakefileArnaldo Carvalho de Melo
Fix these warning: acme@parisc:~/git/linux-2.6-tip$ make -C tools/perf/ install make: Entering directory `/home/acme/git/linux-2.6-tip/tools/perf' Makefile:833: warning: overriding commands for target `perf-archive' Makefile:822: warning: ignoring old commands for target `perf-archive' Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1263846102-24841-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20perf archive: Add documentationArnaldo Carvalho de Melo
This also makes it appear on the 'perf --help' output, i.e. util/generate-cmdlist.sh now takes it into account. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1263837559-24168-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20kprobetrace, doc: Add the explanation to remove probe pointsMotohiro KOSAKI
Latest kprobetrace can remove probe points selectively, thus the documentation should be updated too. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20100119023512.31880.35535.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-20kprobetrace, doc: Shell needs single quote to use $ characterMotohiro KOSAKI
Shell interprets $val as shell variable, thus we need quote if we use the echo command. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> LKML-Reference: <20100119023505.31880.17367.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-18Merge branch 'perf/scheduling' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
2010-01-17perf: Better order flexible and pinned schedulingFrederic Weisbecker
When a task gets scheduled in. We don't touch the cpu bound events so the priority order becomes: cpu pinned, cpu flexible, task pinned, task flexible. So schedule out cpu flexibles when a new task context gets in and correctly order the groups to schedule in: task pinned, cpu flexible, task flexible. Cpu pinned groups don't need to be touched at this time. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
2010-01-17perf: Don't schedule out/in pinned events on task tickFrederic Weisbecker
We don't need to schedule in/out pinned events on task tick, now that pinned and flexible groups can be scheduled separately. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
2010-01-17perf: Allow pinned and flexible groups to be scheduled separatelyFrederic Weisbecker
Tune the scheduling helpers so that we can choose to schedule either pinned and/or flexible groups from a context. And while at it, refactor a bit the naming of these helpers to make these more consistent and flexible. There is no (intended) change in scheduling behaviour in this patch. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
2010-01-17perf: Make __perf_event_sched_out staticFrederic Weisbecker
__perf_event_sched_out doesn't need to be globally available, make it static. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
2010-01-17tracing/kprobe: Update kprobe tracing self test for new syntaxMasami Hiramatsu
Update kprobe tracing self test for new syntax (it supports deleting individual probes, and drops $argN support) and behavior change (new probes are disabled in default). This selftest includes the following checks: - Adding function-entry probe and return probe with arguments. - Enabling these probes. - Deleting it individually. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100114051211.7814.29436.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-17perf probe: Fix build error of builtin-probe.cHitoshi Mitake
I got this build error when building tip tree: | cc1: warnings being treated as errors | builtin-probe.c:123: error: 'opt_show_lines' defined but not used This error is caused by: | #ifndef NO_LIBDWARF | OPT_CALLBACK('L', "line", NULL, | "FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]", | "Show source code lines.", opt_show_lines), | #endif My environment defines NO_LIBDWARF, so gcc treated opt_show_lines() as garbage. So I moved opt_show_lines() into #ifndef NO_LIBDWARF ... #endif block. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1263645076-9993-1-git-send-email-mitake@dcl.info.waseda.ac.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-17perf: Fix implicit declaration of getline in util.cFrederic Weisbecker
getline() is considered as undeclared in util/util.c because it includes string.h, that in turn includes stdio.h, without having defined _GNU_SOURCE. But util.c also includes util.h that handles the _GNU_SOURCE and all the needed inclusions already. Let's include only util.h and sys/mman.h which is the only one header not handled by util.h This fixes the following build error: util/util.c: In function 'slow_copyfile': util/util.c:49: erreur: implicit declaration of function 'getline' util/util.c:49: erreur: nested extern declaration of 'getline' Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1263648075-3858-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-01-16perf: Export software-only event group characteristic as a flagFrederic Weisbecker
Before scheduling an event group, we first check if a group can go on. We first check if the group is made of software only events first, in which case it is enough to know if the group can be scheduled in. For that purpose, we iterate through the whole group, which is wasteful as we could do this check when we add/delete an event to a group. So we create a group_flags field in perf event that can host characteristics from a group of events, starting with a first PERF_GROUP_SOFTWARE flag that reduces the check on the fast path. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
2010-01-16perf: Round robin flexible groups of events using list_rotate_left()Frederic Weisbecker
This is more proper that doing it through a list_for_each_entry() that breaks after the first entry. v2: Don't rotate pinned groups as its not needed to time share them. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
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