On Tue, Jul 26, 2005 at 11:39:11AM -0700, Badari Pulavarty wrote: > On Tue, 2005-07-26 at 11:11 -0700, Andrew Morton wrote: > > Badari Pulavarty <[EMAIL PROTECTED]> wrote: > > > > > > After KS & OLS discussions about memory pressure, I wanted to re-do > > > iSCSI testing with "dd"s to see if we are throttling writes. > > > > > > I created 50 10-GB ext3 filesystems on iSCSI luns. Test is simple > > > 50 dds (one per filesystem). System seems to throttle memory properly > > > and making progress. (Machine doesn't respond very well for anything > > > else, but my vmstat keeps running - 100% sys time). > > > > It's important to monitor /proc/meminfo too - the amount of dirty/writeback > > pages, etc. > > > > btw, 100% system time is quite appalling. Are you sure vmstat is telling > > the truth? If so, where's it all being spent? > > > > > > Well, profile doesn't show any time in "default_idle". So > I believe, vmstat is telling the truth.
Badari, You probably covered this, but just to make sure, if you're on a pentium4 machine, I usually boot w/ "idle=poll" to see proper idle reporting because otherwise the chip will throttle itself back and idle time will be skewed -- at least on oprofile. Sonny - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/