On Thu, 25 Oct 2007 17:40:25 -0500 "Jose R. Santos" <jrs@xxxxxxxxxx> wrote: > > > > > > I really want to use seekwatcher to test some of the stuff that > > > I'm doing for flex_bg feature but it barfs on me in my test > > > machine. > > > > > > running :sleep 10: > > > done running sleep 10 > > > Device: /dev/sdh > > > Total: 0 events (dropped 0), 1368 KiB > > > data blktrace done > > > Traceback (most recent call last): > > > File "/usr/bin/seekwatcher", line 534, in ? > > > add_range(hist, step, start, size) > > > File "/usr/bin/seekwatcher", line 522, in add_range > > > val = hist[slot] > > > IndexError: list index out of range > > > > I don't think you have any events in the trace. Try this instead: > > > > echo 3 > /proc/sys/vm/drop_caches > > seekwatcher -t find-trace -d /dev/xxxx -p 'find /usr/local -type f' > > Nope, get the same error. There does seem to be data recorded in the > trace files and iostat does show activity on the disk. Hmmm, could you please send me your trace files. There will be one for each cpu, starting with find-trace-blktrace > > I wanted to benchmark flexbg too, but couldn't quite figure out the > > correct patch combination ;) > > Ill attach e2progfs and Kernel patches but do realize that these are > experimental patches that Im using to test what layout would work > best. Don't take them too seriously as it is largely incomplete. Thanks, I'll try this out. > > Currently trying to come up with workloads to test this and other > changes with. Im am warming up to yours :) At least for the write phases of compilebench, it should benefit from data and metadata separation. It made a very big difference in btrfs, (from 20MB/s up to 32MB/s on create). However it did make the read phases slower. -chris - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
