)]}'
{
  "log": [
    {
      "commit": "c22ce143d15eb288543fe9873e1c5ac1c01b69a1",
      "tree": "dc7d457b8952fc50dfc90df659b35de4117c61fc",
      "parents": [
        "7dbdf43cfa635ddc3701cc8d1eab07597cd731c0"
      ],
      "author": {
        "name": "Hiro Yoshioka",
        "email": "hyoshiok@miraclelinux.com",
        "time": "Fri Jun 23 02:04:16 2006 -0700"
      },
      "committer": {
        "name": "Linus Torvalds",
        "email": "torvalds@g5.osdl.org",
        "time": "Fri Jun 23 07:42:56 2006 -0700"
      },
      "message": "[PATCH] x86: cache pollution aware __copy_from_user_ll()\n\nUse the x86 cache-bypassing copy instructions for copy_from_user().\n\nSome performance data are\n\nTotal of GLOBAL_POWER_EVENTS (CPU cycle samples)\n\n2.6.12.4.orig    1921587\n2.6.12.4.nt      1599424\n1599424/1921587\u003d83.23% (16.77% reduction)\n\nBSQ_CACHE_REFERENCE (L3 cache miss)\n2.6.12.4.orig      57427\n2.6.12.4.nt        20858\n20858/57427\u003d36.32% (63.7% reduction)\n\nL3 cache miss reduction of __copy_from_user_ll\nsamples  %\n37408    65.1412  vmlinux                  __copy_from_user_ll\n23        0.1103  vmlinux                  __copy_user_zeroing_intel_nocache\n23/37408\u003d0.061% (99.94% reduction)\n\nTop 5 of 2.6.12.4.nt\nCounted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (mandatory) count 100000\nsamples  %        app name                 symbol name\n128392    8.0274  vmlinux                  __copy_user_zeroing_intel_nocache\n64206     4.0143  vmlinux                  journal_add_journal_head\n59746     3.7355  vmlinux                  do_get_write_access\n47674     2.9807  vmlinux                  journal_put_journal_head\n46021     2.8774  vmlinux                  journal_dirty_metadata\npattern9-0-cpu4-0-09011728/summary.out\n\nCounted BSQ_CACHE_REFERENCE events (cache references seen by the bus unit) with a unit mask of 0x3f (multiple flags) count 3000\nsamples  %        app name                 symbol name\n69755     4.2861  vmlinux                  __copy_user_zeroing_intel_nocache\n55685     3.4215  vmlinux                  journal_add_journal_head\n52371     3.2179  vmlinux                  __find_get_block\n45504     2.7960  vmlinux                  journal_put_journal_head\n36005     2.2123  vmlinux                  journal_stop\npattern9-0-cpu4-0-09011744/summary.out\n\nCounted BSQ_CACHE_REFERENCE events (cache references seen by the bus unit) with a unit mask of 0x200 (read 3rd level cache miss) count 3000\nsamples  %        app name                 symbol name\n1147      5.4994  vmlinux                  journal_add_journal_head\n881       4.2240  vmlinux                  journal_dirty_data\n872       4.1809  vmlinux                  blk_rq_map_sg\n734       3.5192  vmlinux                  journal_commit_transaction\n617       2.9582  vmlinux                  radix_tree_delete\npattern9-0-cpu4-0-09011731/summary.out\n\niozone results are\n\noriginal 2.6.12.4 CPU time \u003d 207.768 sec\ncache aware       CPU time \u003d 184.783 sec\n(three times run)\n184.783/207.768\u003d88.94% (11.06% reduction)\n\noriginal:\npattern9-0-cpu4-0-08191720/iozone.out:  CPU Utilization: Wall time   45.997    CPU time   64.527    CPU utilization 140.28 %\npattern9-0-cpu4-0-08191741/iozone.out:  CPU Utilization: Wall time   46.878    CPU time   71.933    CPU utilization 153.45 %\npattern9-0-cpu4-0-08191743/iozone.out:  CPU Utilization: Wall time   45.152    CPU time   71.308    CPU utilization 157.93 %\n\ncache awre:\npattern9-0-cpu4-0-09011728/iozone.out:  CPU Utilization: Wall time   44.842    CPU time   62.465    CPU utilization 139.30 %\npattern9-0-cpu4-0-09011731/iozone.out:  CPU Utilization: Wall time   44.718    CPU time   59.273    CPU utilization 132.55 %\npattern9-0-cpu4-0-09011744/iozone.out:  CPU Utilization: Wall time   44.367    CPU time   63.045    CPU utilization 142.10 %\n\nSigned-off-by: Hiro Yoshioka \u003chyoshiok@miraclelinux.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@osdl.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@osdl.org\u003e\n"
    }
  ]
}