On Wed, Aug 31 2005, Holger Kiehl wrote: > ># ./oread /dev/sdX > > > >and it will read 128k chunks direct from that device. Run on the same > >drives as above, reply with the vmstat info again. > > > Using kernel 2.6.12.5 again, here the results:
[snip] Ok, reads as expected, like the buffered io but using less system time. And you are still 1/3 off the target data rate, hmmm... With the reads, how does the aggregate bandwidth look when you add 'clients'? Same as with writes, gradually decreasing per-device throughput? -- Jens Axboe - 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/
