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Peter Zijlstra 96645678cd lockstat: measure lock bouncing 
__acquire
        |
       lock _____
        |        \
        |    __contended
        |         |
        |        wait
        | _______/
        |/
        |
   __acquired
        |
   __release
        |
     unlock

We measure acquisition and contention bouncing.

This is done by recording a cpu stamp in each lock instance.

Contention bouncing requires the cpu stamp to be set on acquisition. Hence we
move __acquired into the generic path.

__acquired is then used to measure acquisition bouncing by comparing the
current cpu with the old stamp before replacing it.

__contended is used to measure contention bouncing (only useful for preemptable
locks)

[akpm@linux-foundation.org: cleanups]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:49 -07:00
..
acpi Pull osi-now into release branch 2007-06-02 01:02:09 -04:00
asm-alpha arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-arm arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-arm26 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-avr32 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-blackfin fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
asm-cris arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-frv arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-generic i386: Put allocated ELF notes in read-only data segment 2007-07-19 10:04:47 -07:00
asm-h8300 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-i386 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-ia64 coredump masking: reimplementation of dumpable using two flags 2007-07-19 10:04:46 -07:00
asm-m32r arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-m68k arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-m68knommu fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
asm-mips arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-parisc arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-powerpc arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-ppc mm: remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty 2007-07-17 10:22:59 -07:00
asm-s390 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-sh arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-sh64 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-sparc arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-sparc64 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-um arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-v850 fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
asm-x86_64 arch: personality independent stack top 2007-07-19 10:04:45 -07:00
asm-xtensa arch: personality independent stack top 2007-07-19 10:04:45 -07:00
crypto [CRYPTO] cryptd: Add software async crypto daemon 2007-05-02 14:38:32 +10:00
keys
linux lockstat: measure lock bouncing 2007-07-19 10:04:49 -07:00
math-emu Delete unused header file math-emu/extended.h 2007-05-08 11:15:05 -07:00
media V4L/DVB (5835): saa7146/dvb-ttpci: Fix signedness warnings (gcc 4.1.1, kernel 2.6.22) 2007-07-18 14:24:44 -03:00
mtd UBI: kill homegrown endian macros 2007-07-18 16:53:49 +03:00
net [XFRM]: Fix crash introduced by struct dst_entry reordering 2007-07-18 01:55:52 -07:00
pcmcia PCMCIA-NETDEV : add new ID of lan&modem multifunction card 2007-07-08 22:16:39 -04:00
rdma IB/cm: Include HCA ACK delay in local ACK timeout 2007-07-10 21:50:05 -07:00
rxrpc
scsi [SCSI] Remove unused method scsi_device_cancel 2007-07-14 16:01:16 -05:00
sound [ALSA] version 1.0.14 2007-05-31 11:03:27 +02:00
video tgafb: actually allocate memory for the pseudo_palette 2007-07-17 10:23:12 -07:00
xen xen: Place vcpu_info structure into per-cpu memory 2007-07-18 08:47:45 -07:00
Kbuild