Robin Holt wrote on Thursday, November 03, 2005 8:37 AM > On Wed, Nov 02, 2005 at 05:53:10PM -0800, Chen, Kenneth W wrote: > > I just did a quick measurement with I/O submission path. get_user_pages > > is my biggest concern that extra level means more code and cache foot > > print for each I/O submission. It cost about 1.5% more in I/O path > > length on a micro-benchmark (from block layer and Up). This could be > > all buried as noise in a larger scheme for industry database benchmark. > > Can you point me at the benchmark? Here, kernel null blk driver: http://marc.theaimsgroup.com/?l=linux-kernel&m=111033439400836&w=2 And here: user space micro-benchmark: http://marc.theaimsgroup.com/?l=linux-kernel&m=111033404219628&w=2 - Ken - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Fri Nov 04 06:59:38 2005
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