Re: Wonderful World of Linux 2.6 - Final

From: Andrea Arcangeli
Date: Thu Dec 18 2003 - 18:53:10 EST


On Thu, Dec 18, 2003 at 09:29:46AM -0600, Andrew Theurer wrote:
> be scheduled optimally, for example, a kernel compile with -j4 on a 4-way P4,
> with and without HT:
>
> average of 10 kernel compiles with -j4 on 2.6.0-test9:
>
> HT disabled: Elapsed: 145.086s User: 513.808s System: 44.724s CPU: 384.5%
> HT enabled: Elapsed: 172.463s User: 633.856s System: 48.003s CPU: 394.8%

is that 4-way a 4-logical-way or 4-physical-way? If it's a 4-logical
way, this workload is much closer to the best case than the worst case.
I'm guessing a simple -j2 or -j3 should do much worse than that.
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