On Tue, May 11, 2010 at 7:56 PM, James Cameron <[email protected]> wrote: > No. Most writes pass in a time consistent with caching, and the latency > is so small that I'm certain they aren't reaching the media (60us). > It's only some writes that are delayed by 600ms to 3000ms.
What you are saying is that this is a different issue from what dsd tracked down -- entirely possible that these are 2 orthogonal issues. Does the frequency and/or std deviation change if you tweak the vm.dirty_* sysctl values? writeback_centisecs and expire_centisecs are likely candidates to affect this. vm.dirty_background_ratio vm.dirty_background_bytes vm.dirty_ratio vm.dirty_bytes vm.dirty_writeback_centisecs vm.dirty_expire_centisecs cheers, mq -- [email protected] [email protected] -- School Server Architect - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff _______________________________________________ Devel mailing list [email protected] http://lists.laptop.org/listinfo/devel
