Re: [PATCH 00/19] Hardware Accelerated MD RAID5: Introduction

Jakob Oestergaard
2006-09-13T07:15:12Z

On Mon, Sep 11, 2006 at 04:00:32PM -0700, Dan Williams wrote:
> Neil,
>
...
>
> Concerning the context switching performance concerns raised at the
> previous release, I have observed the following. For the hardware
> accelerated case it appears that performance is always better with the
> work queue than without since it allows multiple stripes to be operated
> on simultaneously. I expect the same for an SMP platform, but so far my
> testing has been limited to IOPs. For a single-processor
> non-accelerated configuration I have not observed performance
> degradation with work queue support enabled, but in the Kconfig option
> help text I recommend disabling it (CONFIG_MD_RAID456_WORKQUEUE).

Out of curiosity; how does accelerated compare to non-accelerated?

--

/ jakob