)]}'
{
  "commit": "317f394160e9beb97d19a84c39b7e5eb3d7815a8",
  "tree": "486f268e9ec010744c17333f0f543da9d3909ff4",
  "parents": [
    "c05fbafba1c5482bee399b360288fa405415e126"
  ],
  "author": {
    "name": "Peter Zijlstra",
    "email": "a.p.zijlstra@chello.nl",
    "time": "Tue Apr 05 17:23:58 2011 +0200"
  },
  "committer": {
    "name": "Ingo Molnar",
    "email": "mingo@elte.hu",
    "time": "Thu Apr 14 08:52:41 2011 +0200"
  },
  "message": "sched: Move the second half of ttwu() to the remote cpu\n\nNow that we\u0027ve removed the rq-\u003elock requirement from the first part of\nttwu() and can compute placement without holding any rq-\u003elock, ensure\nwe execute the second half of ttwu() on the actual cpu we want the\ntask to run on.\n\nThis avoids having to take rq-\u003elock and doing the task enqueue\nremotely, saving lots on cacheline transfers.\n\nAs measured using: http://oss.oracle.com/~mason/sembench.c\n\n  $ for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor ; do echo performance \u003e $i; done\n  $ echo 4096 32000 64 128 \u003e /proc/sys/kernel/sem\n  $ ./sembench -t 2048 -w 1900 -o 0\n\n  unpatched: run time 30 seconds 647278 worker burns per second\n  patched:   run time 30 seconds 816715 worker burns per second\n\nReviewed-by: Frank Rowand \u003cfrank.rowand@am.sony.com\u003e\nCc: Mike Galbraith \u003cefault@gmx.de\u003e\nCc: Nick Piggin \u003cnpiggin@kernel.dk\u003e\nCc: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\nCc: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nLink: http://lkml.kernel.org/r/20110405152729.515897185@chello.nl\n",
  "tree_diff": [
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}