)]}'
{
  "commit": "96645678cd726e87ce42a0664de71e047e32bca4",
  "tree": "116f568a090414777b481e8e5d9db55f420e4335",
  "parents": [
    "443aef0eddfa44c158d1b94ebb431a70638fcab4"
  ],
  "author": {
    "name": "Peter Zijlstra",
    "email": "a.p.zijlstra@chello.nl",
    "time": "Thu Jul 19 01:49:00 2007 -0700"
  },
  "committer": {
    "name": "Linus Torvalds",
    "email": "torvalds@woody.linux-foundation.org",
    "time": "Thu Jul 19 10:04:49 2007 -0700"
  },
  "message": "lockstat: measure lock bouncing\n\n    __acquire\n        |\n       lock _____\n        |        \\\n        |    __contended\n        |         |\n        |        wait\n        | _______/\n        |/\n        |\n   __acquired\n        |\n   __release\n        |\n     unlock\n\nWe measure acquisition and contention bouncing.\n\nThis is done by recording a cpu stamp in each lock instance.\n\nContention bouncing requires the cpu stamp to be set on acquisition. Hence we\nmove __acquired into the generic path.\n\n__acquired is then used to measure acquisition bouncing by comparing the\ncurrent cpu with the old stamp before replacing it.\n\n__contended is used to measure contention bouncing (only useful for preemptable\nlocks)\n\n[akpm@linux-foundation.org: cleanups]\nSigned-off-by: Peter Zijlstra \u003ca.p.zijlstra@chello.nl\u003e\nAcked-by: Ingo Molnar \u003cmingo@elte.hu\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n",
  "tree_diff": [
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}