Messages in this thread | | | Date | Thu, 15 Nov 2007 12:07:47 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: High priority tasks break SMP balancer? |
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On Thu, 15 Nov 2007, Micah Dowty wrote:
> For reference, the exact test I used with git-bisect is attached. The > C program (priosched) starts two busy-looping threads and a > high-priority high-frequency thread which uses relatively little > CPU. The Python program repeatedly starts the C program, runs it for a > half second, and measures the resulting imbalance in CPU usage. On > kernels prior to the above commit, this reports values within about > 10% of 1.0. On later kernels, it crashes within a couple iterations > due to a divide-by-zero error :)
The kernel crashes? Sounds like your application crashes with a divide by zero?
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