Re: [Lse-tech] Hyperthreading performance on 2.4.19 and 2.5.32

[Duc Vianney]

>What happened to the -38% degradation you found? That seems to have
>fallen off the results list for some reason ... did you fix it, or is it
still >there?

Martin ... Thanks for pointing it out.
The -38% degradation was seen on Sync Random Disk Writes, Sync
Sequential Disk Writes, and Sync Disk Copies observed from the
AIM9 bencmark running in Single User test mode. The degradation
is still there and I will investigate it later when we have the
hardware resource back.

Thanks ... Duc.

"Martin J. Bligh" <[e-mail]>@lists.sourceforge.net on 09/17/2002
03:05:35 PM

Sent by:    [e-mail]

To:    Duc Vianney/Austin/IBM@IBMUS, [e-mail],
       [e-mail]
cc:
Subject:    Re: [Lse-tech] Hyperthreading performance on 2.4.19 and 2.5.32

> Benchmarks. For multithreaded benchmarks: chat, dbench and tbench.
> Summary of results. The results on Linux kernel 2.4.19 show HT might
> improve multithreaded application by as much as 30%. On kernel 2.5.32,
> HT may provide speed-up as high as 60%.

What happened to the -38% degradation you found? That seems to have
fallen off the results list for some reason ... did you fix it, or is it
still there?

M.

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