Re: [patchlet] Re: Epic regression in throughput since v2.6.23

[Ingo Molnar]

here's some start-debit versus non-start-debit numbers.

The workload: on a dual-core box start and kill 10 loops, once every 
second. PID 23137 is a shell doing interactive stuff. (running a loop of 
usleep 100000 and echo)

START_DEBIT:

europe:~> perf sched lat | grep 23137
  bash:23137            |     34.380 ms |      187 | avg:    0.005 ms | max:    0.017 ms |
  bash:23137            |     36.410 ms |      188 | avg:    0.005 ms | max:    0.011 ms |
  bash:23137            |     36.680 ms |      183 | avg:    0.007 ms | max:    0.333 ms |

NO_START_DEBIT:

europe:~> perf sched lat | grep 23137
  bash:23137            |     35.531 ms |      183 | avg:    0.005 ms | max:    0.019 ms |
  bash:23137            |     35.511 ms |      188 | avg:    0.007 ms | max:    0.334 ms |
  bash:23137            |     35.774 ms |      185 | avg:    0.005 ms | max:    0.019 ms |

Seems very similar at first sight.

	Ingo
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