Wang Nan 1879445dfa perf/core: Set event's default ::overflow_handler() ...

Set a default event->overflow_handler in perf_event_alloc() so don't
need to check event->overflow_handler in __perf_event_overflow().
Following commits can give a different default overflow_handler.

Initial idea comes from Peter:

  http://lkml.kernel.org/r/20130708121557.GA17211@twins.programming.kicks-ass.net

Since the default value of event->overflow_handler is not NULL, existing
'if (!overflow_handler)' checks need to be changed.

is_default_overflow_handler() is introduced for this.

No extra performance overhead is introduced into the hot path because in the
original code we still need to read this handler from memory. A conditional
branch is avoided so actually we remove some instructions.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <pi3orama@163.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1459147292-239310-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-03-31 10:30:47 +02:00

..

.gitignore

…

arch_timer.c

arch_timer: Move to generic sched_clock framework

2013-10-09 16:54:10 -07:00

armksyms.c

ARM: 8479/2: add implementation for arm-smccc

2016-01-04 16:24:34 +00:00

asm-offsets.c

Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

2015-04-15 13:53:55 -07:00

atags_compat.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

atags_parse.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

atags_proc.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

atags.h

ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h

2016-01-04 11:26:00 +00:00

bios32.c

ARM/PCI: Move align_resource function pointer to pci_host_bridge structure

2015-11-25 13:23:38 -06:00

calls.S

ARM: wire up copy_file_range() syscall

2016-01-27 18:14:46 +00:00

cpuidle.c

ARM: 8485/1: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook

2015-12-22 12:09:43 +00:00

crash_dump.c

ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr

2014-04-07 12:10:00 +01:00

debug.S

ARM: unify MMU/!MMU addruart calls

2015-05-20 23:09:51 +02:00

devtree.c

ARM: make default platform work for NOMMU

2015-12-17 17:45:47 +01:00

dma-isa.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

dma.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

early_printk.c

early_printk: consolidate random copies of identical code

2013-04-29 18:28:13 -07:00

efi.c

ARM: wire up UEFI init and runtime support

2015-12-13 19:18:30 +01:00

elf.c

Disintegrate asm/system.h for ARM

2012-03-28 18:30:01 +01:00

entry-armv.S

ARM: remove user cmpxchg syscall

2015-10-03 16:36:45 +01:00

entry-common.S

Merge branch 'uaccess' into fixes

2015-09-11 19:18:28 +01:00

entry-ftrace.S

ARM: replace BSYM() with badr assembly macro

2015-05-08 17:33:50 +01:00

entry-header.S

ARM: entry: provide uaccess assembly macro hooks

2015-08-26 20:27:02 +01:00

entry-v7m.S

ARM: 8450/1: v7-M: Use ret_to_user_from_irq in PendSV handler

2015-11-16 18:34:37 +00:00

fiq.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

fiqasm.S

ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

2014-07-18 12:29:04 +01:00

ftrace.c

ARM: kprobes: enable OPTPROBES for ARM 32

2015-01-13 16:10:17 +00:00

head-common.S

ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

2014-07-18 12:29:04 +01:00

head-nommu.S

ARM: 8383/1: nommu: avoid deprecated source register on mov

2015-06-12 21:18:48 +01:00

head.S

Merge branch 'uaccess' into fixes

2015-09-11 19:18:28 +01:00

hibernate.c

ARM: move reboot code to arch/arm/kernel/reboot.c

2015-04-02 09:50:45 +01:00

hw_breakpoint.c

perf/core: Set event's default ::overflow_handler()

2016-03-31 10:30:47 +02:00

hyp-stub.S

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2014-08-07 11:35:30 -07:00

insn.c

ARM: fix missing bug.h include in arch/arm/kernel/insn.c

2012-03-30 11:51:46 +01:00

io.c

ARM: io.c: clean up EXPORT_SYMBOL()s

2014-11-21 15:25:02 +00:00

irq.c

ARM: uniphier: add outer cache support

2015-10-27 09:20:50 +09:00

isa.c

arm: convert use of typedef ctl_table to struct ctl_table

2014-06-06 16:08:15 -07:00

iwmmxt.S

ARM: 8221/1: PJ4: allow building in Thumb-2 mode

2014-12-03 16:08:00 +00:00

jump_label.c

jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}

2015-08-03 11:34:12 +02:00

kgdb.c

ARM: 8428/1: kgdb: Fix registers on sleeping tasks

2015-10-03 16:36:45 +01:00

machine_kexec.c

ARM: 8338/1: kexec: Relax SMP validation to improve DT compatibility

2015-04-02 09:59:43 +01:00

Makefile

ARM: 8534/1: virt: fix hyp-stub build for pre-ARMv7 CPUs

2016-02-22 11:39:13 +00:00

module-plts.c

module: use a structure to encapsulate layout.

2015-12-04 22:46:25 +01:00

module.c

ARM: 8220/1: allow modules outside of bl range

2015-05-08 10:42:34 +01:00

module.lds

ARM: 8220/1: allow modules outside of bl range

2015-05-08 10:42:34 +01:00

opcodes.c

ARM: 7206/1: Add generic ARM instruction set condition code checks.

2011-12-13 08:52:02 +00:00

paravirt.c

arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops

2015-12-21 14:40:54 +00:00

patch.c

ARM: probes: move all probe code to dedicate directory

2015-01-09 09:36:50 +00:00

perf_callchain.c

arm: perf: factor out callchain code

2014-10-30 12:16:58 +00:00

perf_event_v6.c

arm: perf: factor arm_pmu core out to drivers

2015-07-31 15:01:14 +01:00

perf_event_v7.c

ARM: perf: add format entry to describe event -> config mapping

2015-12-22 14:42:57 +00:00

perf_event_xscale.c

arm: perf: factor arm_pmu core out to drivers

2015-07-31 15:01:14 +01:00

perf_regs.c

perf: Move task_pt_regs sampling into arch code

2015-01-09 11:12:28 +01:00

pj4-cp0.c

ARM: 8452/3: PJ4: make coprocessor access sequences buildable in Thumb2 mode

2016-01-04 11:12:10 +00:00

process.c

ARM: report proper DACR value in oops dumps

2015-12-04 19:20:48 +00:00

psci_smp.c

ARM: use const and __initconst for smp_operations

2015-12-01 22:17:45 +01:00

ptrace.c

Merge git://git.infradead.org/users/eparis/audit

2014-10-19 16:25:56 -07:00

reboot.c

ARM: 8400/1: use virt_to_idmap to get phys_reset address

2015-07-17 15:08:17 +01:00

reboot.h

ARM: move reboot code to arch/arm/kernel/reboot.c

2015-04-02 09:50:45 +01:00

relocate_kernel.S

ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

2014-07-18 12:29:04 +01:00

return_address.c

ARM: 8328/1: remove empty preprocessor #else branch

2015-03-28 16:54:53 +00:00

setup.c

arch: Set IORESOURCE_SYSTEM_RAM flag for System RAM

2016-01-30 09:49:57 +01:00

signal.c

Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

2015-09-19 21:05:02 -07:00

sigreturn_codes.S

ARM: 7895/1: signal: fix armv7-m build issue in sigreturn_codes.S

2013-11-30 22:21:00 +00:00

sleep.S

ARM: fix new BSYM() usage introduced via for-arm-soc branch

2015-06-12 21:19:35 +01:00

smccc-call.S

ARM: 8479/2: add implementation for arm-smccc

2016-01-04 16:24:34 +00:00

smp_scu.c

ARM: 8122/1: smp_scu: enable SCU standby support

2014-08-02 08:51:53 +01:00

smp_tlb.c

ARM: 8111/1: Enable erratum 798181 for Broadcom Brahma-B15

2014-07-24 14:40:26 +01:00

smp_twd.c

ARM: clean up TWD after previous patch

2015-10-09 16:22:53 +01:00

smp.c

arch/hotplug: Call into idle with a proper state

2016-03-01 20:36:57 +01:00

stacktrace.c

ARM: 8172/1: Use current_stack_pointer in save_stack_trace_tsk

2014-11-13 23:58:03 +00:00

suspend.c

ARM: 8248/1: pm: remove outdated comment

2015-01-21 15:58:57 +00:00

swp_emulate.c

ARM: 8475/1: SWP emulation: Restore original *data when failed

2015-12-15 11:51:42 +00:00

sys_arm.c

arm: switch to generic fork/vfork/clone

2012-11-28 22:13:54 -05:00

sys_oabi-compat.c

[PATCH] arm: fix handling of F_OFD_... in oabi_fcntl64()

2015-12-29 13:04:21 -05:00

tcm.c

ARM: 8388/1: tcm: Don't crash when TCM banks are protected by TrustZone

2015-06-06 10:37:28 +01:00

thumbee.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

time.c

clocksource: cosmetic: Drop OF 'dependency' from symbols

2015-10-01 02:18:39 +02:00

topology.c

ARM: convert printk(KERN_* to pr_*

2014-11-21 15:24:50 +00:00

traps.c

ARM: remove user cmpxchg syscall

2015-10-03 16:36:45 +01:00

unwind.c

ARM: 8176/1: Use current_stack_pointer in unwind_backtrace

2014-11-13 23:58:09 +00:00

v7m.c

ARM: 7828/1: ARMv7-M: implement restart routine common to all v7-M machines

2013-09-02 13:49:29 +01:00

vdso.c

ARM: 8476/1: VDSO: use PTR_ERR_OR_ZERO for vma check

2015-12-17 10:29:01 +00:00

vmlinux.lds.S

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2015-04-16 13:58:29 -05:00

xscale-cp0.c

ARM: make xscale iwmmxt code multiplatform aware

2015-12-01 21:44:24 +01:00