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2011-01-11Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2-5/+3
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: (28 commits) perf session: Fix infinite loop in __perf_session__process_events perf evsel: Support perf_evsel__open(cpus > 1 && threads > 1) perf sched: Use PTHREAD_STACK_MIN to avoid pthread_attr_setstacksize() fail perf tools: Emit clearer message for sys_perf_event_open ENOENT return perf stat: better error message for unsupported events perf sched: Fix allocation result check perf, x86: P4 PMU - Fix unflagged overflows handling dynamic debug: Fix build issue with older gcc tracing: Fix TRACE_EVENT power tracepoint creation tracing: Fix preempt count leak tracepoint: Add __rcu annotation tracing: remove duplicate null-pointer check in skb tracepoint tracing/trivial: Add missing comma in TRACE_EVENT comment tracing: Include module.h in define_trace.h x86: Save rbp in pt_regs on irq entry x86, dumpstack: Fix unused variable warning x86, NMI: Clean-up default_do_nmi() x86, NMI: Allow NMI reason io port (0x61) to be processed on any CPU x86, NMI: Remove DIE_NMI_IPI x86, NMI: Add priorities to handlers ...
2011-01-07tracing: Fix TRACE_EVENT power tracepoint creationMathieu Desnoyers1-1/+1
DEFINE_TRACE should also exist when CONFIG_EVENT_TRACING=n. Otherwise, setting only TRACEPOINTS=y is broken. Acked-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> LKML-Reference: <20101028153117.GA4051@Krystal> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-01-07tracing: Fix preempt count leakLi Zefan1-4/+2
While running my ftrace stress test, this showed up: BUG: sleeping function called from invalid context at mm/mmap.c:233 ... note: cat[3293] exited with preempt_count 1 The bug was introduced by commit 91e86e560d0b3ce4c5fc64fd2bbb99f856a30a4e ("tracing: Fix recursive user stack trace") Cc: <stable@kernel.org> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <4D0089AC.1020802@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-01-07sched: Constify function scope static struct sched_param usagePeter Zijlstra1-1/+1
Function-scope statics are discouraged because they are easily overlooked and can cause subtle bugs/races due to their global (non-SMP safe) nature. Linus noticed that we did this for sched_param - at minimum make the const. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: Message-ID: <AANLkTinotRxScOHEb0HgFgSpGPkq_6jKTv5CfvnQM=ee@mail.gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-06Merge branch 'sched-core-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits) sched: Change wait_for_completion_*_timeout() to return a signed long sched, autogroup: Fix reference leak sched, autogroup: Fix potential access to freed memory sched: Remove redundant CONFIG_CGROUP_SCHED ifdef sched: Fix interactivity bug by charging unaccounted run-time on entity re-weight sched: Move periodic share updates to entity_tick() printk: Use this_cpu_{read|write} api on printk_pending sched: Make pushable_tasks CONFIG_SMP dependant sched: Add 'autogroup' scheduling feature: automated per session task groups sched: Fix unregister_fair_sched_group() sched: Remove unused argument dest_cpu to migrate_task() mutexes, sched: Introduce arch_mutex_cpu_relax() sched: Add some clock info to sched_debug cpu: Remove incorrect BUG_ON cpu: Remove unused variable sched: Fix UP build breakage sched: Make task dump print all 15 chars of proc comm sched: Update tg->shares after cpu.shares write sched: Allow update_cfs_load() to update global load sched: Implement demand based update_cfs_load() ...
2011-01-05Merge commit 'v2.6.37' into sched/coreIngo Molnar2-2/+17
Merge reason: Merge the final .37 tree. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-04perf: Clean up power events by introducing new, more generic onesThomas Renninger2-0/+18
Add these new power trace events: power:cpu_idle power:cpu_frequency power:machine_suspend The old C-state/idle accounting events: power:power_start power:power_end Have now a replacement (but we are still keeping the old tracepoints for compatibility): power:cpu_idle and power:power_frequency is replaced with: power:cpu_frequency power:machine_suspend is newly introduced. Jean Pihet has a patch integrated into the generic layer (kernel/power/suspend.c) which will make use of it. the type= field got removed from both, it was never used and the type is differed by the event type itself. perf timechart userspace tool gets adjusted in a separate patch. Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Jean Pihet <jean.pihet@newoldbits.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: rjw@sisk.pl LKML-Reference: <1294073445-14812-3-git-send-email-trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> LKML-Reference: <1290072314-31155-2-git-send-email-trenn@suse.de>
2011-01-04perf: Do not export power_frequency, but power_start eventThomas Renninger1-1/+1
power_frequency moved to drivers/cpufreq/cpufreq.c which has to be compiled in, no need to export it. intel_idle can a be module though... Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Jean Pihet <jean.pihet@newoldbits.com> Cc: Jean Pihet <j-pihet@ti.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: rjw@sisk.pl LKML-Reference: <1294073445-14812-2-git-send-email-trenn@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> LKML-Reference: <1290072314-31155-2-git-send-email-trenn@suse.de>
2011-01-04Merge commit 'v2.6.37-rc8' into perf/coreIngo Molnar1-1/+8
Merge reason: pick up latest -rc. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-12-23ring_buffer: Off-by-one and duplicate events in ring_buffer_read_pageDavid Sharp1-1/+8
Fix two related problems in the event-copying loop of ring_buffer_read_page. The loop condition for copying events is off-by-one. "len" is the remaining space in the caller-supplied page. "size" is the size of the next event (or two events). If len == size, then there is just enough space for the next event. size was set to rb_event_ts_length, which may include the size of two events if the first event is a time-extend, in order to assure time- extends are kept together with the event after it. However, rb_advance_reader always advances by one event. This would result in the event after any time-extend being duplicated. Instead, get the size of a single event for the memcpy, but use rb_event_ts_length for the loop condition. Signed-off-by: David Sharp <dhsharp@google.com> LKML-Reference: <1293064704-8101-1-git-send-email-dhsharp@google.com> LKML-Reference: <AANLkTin7nLrRPc9qGjdjHbeVDDWiJjAiYyb-L=gH85bx@mail.gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-12-22Merge branch 'tip/perf/core' of ↵Ingo Molnar2-4/+16
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
2010-12-16Merge branch 'perf/urgent' into perf/coreIngo Molnar1-1/+9
Merge reason: We want to apply a dependent patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-12-16Merge branch 'tip/perf/urgent' of ↵Ingo Molnar1-1/+9
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
2010-12-08Merge branch 'linus' into sched/coreIngo Molnar1-0/+19
Merge reason: we want to queue up dependent cleanup Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-30tracing: Fix panic when lseek() called on "trace" opened for writingSlava Pestov1-1/+9
The file_ops struct for the "trace" special file defined llseek as seq_lseek(). However, if the file was opened for writing only, seq_open() was not called, and the seek would dereference a null pointer, file->private_data. This patch introduces a new wrapper for seq_lseek() which checks if the file descriptor is opened for reading first. If not, it does nothing. Cc: <stable@kernel.org> Signed-off-by: Slava Pestov <slavapestov@google.com> LKML-Reference: <1290640396-24179-1-git-send-email-slavapestov@google.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-11-27Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds1-0/+19
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 symbols: Remove incorrect open-coded container_of() perf record: Handle restrictive permissions in /proc/{kallsyms,modules} x86/kprobes: Prevent kprobes to probe on save_args() irq_work: Drop cmpxchg() result perf: Fix owner-list vs exit x86, hw_nmi: Move backtrace_mask declaration under ARCH_HAS_NMI_WATCHDOG tracing: Fix recursive user stack trace perf,hw_breakpoint: Initialize hardware api earlier x86: Ignore trap bits on single step exceptions tracing: Force arch_local_irq_* notrace for paravirt tracing: Fix module use of trace_bprintk()
2010-11-26Merge commit 'v2.6.37-rc3' into sched/coreIngo Molnar2-2/+1
Merge reason: Pick up latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-26Merge commit 'v2.6.37-rc3' into perf/coreIngo Molnar2-2/+1
Merge reason: Pick up latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-19tracing/events: Show real number in array fieldsSteven Rostedt2-4/+16
Currently we have in something like the sched_switch event: field:char prev_comm[TASK_COMM_LEN]; offset:12; size:16; signed:1; When a userspace tool such as perf tries to parse this, the TASK_COMM_LEN is meaningless. This is done because the TRACE_EVENT() macro simply uses a #len to show the string of the length. When the length is an enum, we get a string that means nothing for tools. By adding a static buffer and a mutex to protect it, we can store the string into that buffer with snprintf and show the actual number. Now we get: field:char prev_comm[16]; offset:12; size:16; signed:1; Something much more useful. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-11-18Merge branch 'perf/core' of ↵Ingo Molnar1-1/+30
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
2010-11-18tracing: New flag to allow non privileged users to use a trace eventFrederic Weisbecker1-1/+30
This adds a new trace event internal flag that allows them to be used in perf by non privileged users in case of task bound tracing. This is desired for syscalls tracepoint because they don't leak global system informations, like some other tracepoints. 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: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Jason Baron <jbaron@redhat.com>
2010-11-18Merge commit 'v2.6.37-rc2' into sched/coreIngo Molnar8-187/+190
Merge reason: Move to a .37-rc base. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-11-18Merge branch 'tip/perf/urgent-3' of ↵Ingo Molnar1-0/+19
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
2010-11-17BKL: remove extraneous #include <smp_lock.h>Arnd Bergmann1-1/+0
The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-16Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds1-1/+1
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] kprobes: Fix the return address of multiple kretprobes [S390] kprobes: disable interrupts throughout [S390] ftrace: build without frame pointers on s390 [S390] mm: add devmem_is_allowed() for STRICT_DEVMEM checking [S390] vmlogrdr: purge after recording is switched off [S390] cio: fix incorrect ccw_device_init_count [S390] tape: add medium state notifications [S390] fix get_user_pages_fast
2010-11-12tracing: Fix recursive user stack traceSteven Rostedt1-0/+19
The user stack trace can fault when examining the trace. Which would call the do_page_fault handler, which would trace again, which would do the user stack trace, which would fault and call do_page_fault again ... Thus this is causing a recursive bug. We need to have a recursion detector here. [ Resubmitted by Jiri Olsa ] [ Eric Dumazet recommended using __this_cpu_* instead of __get_cpu_* ] Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Jiri Olsa <jolsa@redhat.com> LKML-Reference: <1289390172-9730-3-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-11-10block: remove REQ_HARDBARRIERChristoph Hellwig1-4/+0
REQ_HARDBARRIER is dead now, so remove the leftovers. What's left at this point is: - various checks inside the block layer. - sanity checks in bio based drivers. - now unused bio_empty_barrier helper. - Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while, but Xen really needs to sort out it's barrier situaton. - setting of ordered tags in uas - dead code copied from old scsi drivers. - scsi different retry for barriers - it's dead and should have been removed when flushes were converted to FS requests. - blktrace handling of barriers - removed. Someone who knows blktrace better should add support for REQ_FLUSH and REQ_FUA, though. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2010-11-10[S390] ftrace: build without frame pointers on s390Heiko Carstens1-1/+1
s390 doesn't need FRAME_POINTERS in order to have a working function tracer. We don't need frame pointers in order to get strack traces since we always have valid backchains by using the -mkernel-backchain gcc option. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-10-27Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2-169/+174
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: (50 commits) perf python scripting: Add futex-contention script perf python scripting: Fixup cut'n'paste error in sctop script perf scripting: Shut up 'perf record' final status perf record: Remove newline character from perror() argument perf python scripting: Support fedora 11 (audit 1.7.17) perf python scripting: Improve the syscalls-by-pid script perf python scripting: print the syscall name on sctop perf python scripting: Improve the syscalls-counts script perf python scripting: Improve the failed-syscalls-by-pid script kprobes: Remove redundant text_mutex lock in optimize x86/oprofile: Fix uninitialized variable use in debug printk tracing: Fix 'faild' -> 'failed' typo perf probe: Fix format specified for Dwarf_Off parameter perf trace: Fix detection of script extension perf trace: Use $PERF_EXEC_PATH in canned report scripts perf tools: Document event modifiers perf tools: Remove direct slang.h include perf_events: Fix for transaction recovery in group_sched_in() perf_events: Revert: Fix transaction recovery in group_sched_in() perf, x86: Use NUMA aware allocations for PEBS/BTS/DS allocations ...
2010-10-27Remove duplicate includes from many filesZimny Lech1-1/+0
Signed-off-by: Zimny Lech <napohybelskurwysynom2010@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26Merge branch 'tip/perf/ringbuffer-2' of ↵Ingo Molnar1-163/+172
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
2010-10-24Merge branch 'for-next' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Update broken web addresses in arch directory. Update broken web addresses in the kernel. Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget Revert "Fix typo: configuation => configuration" partially ida: document IDA_BITMAP_LONGS calculation ext2: fix a typo on comment in ext2/inode.c drivers/scsi: Remove unnecessary casts of private_data drivers/s390: Remove unnecessary casts of private_data net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data drivers/infiniband: Remove unnecessary casts of private_data drivers/gpu/drm: Remove unnecessary casts of private_data kernel/pm_qos_params.c: Remove unnecessary casts of private_data fs/ecryptfs: Remove unnecessary casts of private_data fs/seq_file.c: Remove unnecessary casts of private_data arm: uengine.c: remove C99 comments arm: scoop.c: remove C99 comments Fix typo configue => configure in comments Fix typo: configuation => configuration Fix typo interrest[ing|ed] => interest[ing|ed] Fix various typos of valid in comments ... Fix up trivial conflicts in: drivers/char/ipmi/ipmi_si_intf.c drivers/usb/gadget/rndis.c net/irda/irnet/irnet_ppp.c
2010-10-23tracing: Fix 'faild' -> 'failed' typoJoe Perches1-1/+1
Signed-off-by: Joe Perches <joe@perches.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Kosina <trivial@kernel.org> LKML-Reference: <cd9855af60d7d90e9f55fc7afd0ed23fcdaa6f52.1287724261.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-23sched: Make sched_param argument static in sched_setscheduler() callersKOSAKI Motohiro1-1/+1
Andrew Morton pointed out almost all sched_setscheduler() callers are using fixed parameters and can be converted to static. It reduces runtime memory use a little. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reported-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: James Morris <jmorris@namei.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-22kdb,ftdump: Remove reference to internal kdb includeJason Wessel1-1/+0
Now that include/linux/kdb.h properly exports all the functions required to dynamically add a kdb shell command, the reference to the private kdb header can be removed. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-10-22Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds5-0/+12
* 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: vfs: make no_llseek the default vfs: don't use BKL in default_llseek llseek: automatically add .llseek fop libfs: use generic_file_llseek for simple_attr mac80211: disallow seeks in minstrel debug code lirc: make chardev nonseekable viotape: use noop_llseek raw: use explicit llseek file operations ibmasmfs: use generic_file_llseek spufs: use llseek in all file operations arm/omap: use generic_file_llseek in iommu_debug lkdtm: use generic_file_llseek in debugfs net/wireless: use generic_file_llseek in debugfs drm: use noop_llseek
2010-10-22Merge branch 'config' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bklLinus Torvalds1-11/+3
* 'config' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: BKL: introduce CONFIG_BKL. dabusb: remove the BKL sunrpc: remove the big kernel lock init/main.c: remove BKL notations blktrace: remove the big kernel lock rtmutex-tester: make it build without BKL dvb-core: kill the big kernel lock dvb/bt8xx: kill the big kernel lock tlclk: remove big kernel lock fix rawctl compat ioctls breakage on amd64 and itanic uml: kill big kernel lock parisc: remove big kernel lock cris: autoconvert trivial BKL users alpha: kill big kernel lock isapnp: BKL removal s390/block: kill the big kernel lock hpet: kill BKL, add compat_ioctl
2010-10-22Merge branch 'tip/perf/core-2' of ↵Ingo Molnar1-6/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
2010-10-21Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-1/+1
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (278 commits) arm: remove machine_desc.io_pg_offst and .phys_io arm: use addruart macro to establish debug mappings arm: return both physical and virtual addresses from addruart arm/debug: consolidate addruart macros for CONFIG_DEBUG_ICEDCC ARM: make struct machine_desc definition coherent with its comment eukrea_mbimxsd-baseboard: Pass the correct GPIO to gpio_free cpuimx27: fix compile when ULPI is selected mach-pcm037_eet: fix compile errors Fixing ethernet driver compilation error for i.MX31 ADS board cpuimx51: update board support mx5: add cpuimx51sd module and its baseboard iomux-mx51: fix GPIO_1_xx 's IOMUX configuration imx-esdhc: update devices registration mx51: add resources for SD/MMC on i.MX51 iomux-mx51: fix SD1 and SD2's iomux configuration clock-mx51: rename CLOCK1 to CLOCK_CCGR for better readability clock-mx51: factorize clk_set_parent and clk_get_rate eukrea_mbimxsd: add support for DVI displays cpuimx25 & cpuimx35: fix OTG port registration in host mode i.MX31 and i.MX35 : fix errate TLSbo65953 and ENGcm09472 ...
2010-10-21Merge branch 'perf-core-for-linus' of ↵Linus Torvalds11-235/+634
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: (163 commits) tracing: Fix compile issue for trace_sched_wakeup.c [S390] hardirq: remove pointless header file includes [IA64] Move local_softirq_pending() definition perf, powerpc: Fix power_pmu_event_init to not use event->ctx ftrace: Remove recursion between recordmcount and scripts/mod/empty jump_label: Add COND_STMT(), reducer wrappery perf: Optimize sw events perf: Use jump_labels to optimize the scheduler hooks jump_label: Add atomic_t interface jump_label: Use more consistent naming perf, hw_breakpoint: Fix crash in hw_breakpoint creation perf: Find task before event alloc perf: Fix task refcount bugs perf: Fix group moving irq_work: Add generic hardirq context callbacks perf_events: Fix transaction recovery in group_sched_in() perf_events: Fix bogus AMD64 generic TLB events perf_events: Fix bogus context time tracking tracing: Remove parent recording in latency tracer graph options tracing: Use one prologue for the preempt irqs off tracer function tracers ...
2010-10-21tracing: Do not limit the size of the number of CPU buffersSteven Rostedt1-6/+2
The tracing per_cpu buffers were limited to 999 CPUs for a mear savings in stack space of a char array. Up the array to 30 characters which is more than enough to hold a 64 bit number. Reported-by: Robin Holt <holt@sgi.com> Suggested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Remove unused macro RB_TIMESTAMPS_PER_PAGESteven Rostedt1-3/+0
With the binding of time extends to events we no longer need to use the macro RB_TIMESTAMPS_PER_PAGE. Remove it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Micro-optimize with some strategic inliningSteven Rostedt1-8/+15
By using inline and noinline, we are able to make the fast path of recording an event 4% faster. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Remove condition to add timestamp in fast pathSteven Rostedt1-22/+6
There's a condition to check if we should add a time extend or not in the fast path. But this condition is racey (in the sense that we can add a unnecessary time extend, but nothing that can break anything). We later check if the time or event time delta should be zero or have real data in it (not racey), making this first check redundant. This check may help save space once in a while, but really is not worth the hassle to try to save some space that happens at most 134 ms at a time. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Bind time extend and data events togetherSteven Rostedt1-124/+142
When the time between two timestamps is greater than 2^27 nanosecs (~134 ms) a time extend event is added that extends the time difference to 59 bits (~18 years). This is due to events only having a 27 bit field to store time. Currently this time extend is a separate event. We add it just before the event data that is being written to the buffer. But before the event data is committed, the event data can also be discarded (as with the case of filters). But because the time extend has already been committed, it will stay in the buffer. If lots of events are being filtered and no event is being written, then every 134ms a time extend can be added to the buffer without any data attached. To keep from filling the entire buffer with time extends, a time extend will never be the first event in a page because the page timestamp can be used. Time extends can only fill the rest of a page with some data at the beginning. This patch binds the time extend with the data. The difference here is that the time extend is not committed before the data is added. Instead, when a time extend is needed, the space reserved on the ring buffer is the time extend + the data event size. The time extend is added to the first part of the reserved block and the data is added to the second. The time extend event is passed back to the reserver, but since the reserver also uses a function to find the data portion of the reserved block, no changes to the ring buffer interface need to be made. When a commit is discarded, we now remove both the time extend and the event. With this approach no more than one time extend can be in the buffer in a row. Data must always follow a time extend. Thanks to Mathieu Desnoyers for suggesting this idea. Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Pass delta by value and not by referenceSteven Rostedt1-8/+8
The delta between events is passed to the timestamp code by reference and the timestamp code will reset the value. But it can be reset from the caller. No need to pass it in by reference. By changing the call to pass by value, lets gcc optimize the code a bit more where it can store the delta in a register and not worry about updating the reference. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-20ring-buffer: Pass timestamp by value and not by referenceSteven Rostedt1-10/+10
The original code for the ring buffer had locations that modified the timestamp and that change was used by the callers. Now, the timestamp is not reused by the callers and there is no reason to pass it by reference. By changing the call to pass by value, lets gcc optimize the code a bit more where it can store the timestamp in a register and not worry about updating the reference. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-19Merge branch 'devel-stable' into develRussell King1-1/+1
2010-10-19ring-buffer: Make write slow path out of lineSteven Rostedt1-2/+5
Gcc inlines the slow path of the ring buffer write which can hurt performance. This patch simply forces the slow path function rb_move_tail() to always be a function. The ring_buffer_benchmark module with reader_disabled=1 shows that this patch changes the time to record an event from 135 ns to 132 ns. (3 ns or 2.22% improvement) Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-19tracing: Fix compile issue for trace_sched_wakeup.cSteven Rostedt1-2/+1
The function start_func_tracer() was incorrectly added in the #ifdef CONFIG_FUNCTION_TRACER condition, but is still used even when function tracing is not enabled. The calls to register_ftrace_function() and register_ftrace_graph() become nops (and their arguments are even ignored), thus there is no reason to hide start_func_tracer() when function tracing is not enabled. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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