On Sat, Jul 02, 2011 at 03:29:15AM +0800, Vivek Goyal wrote: > On Wed, Jun 29, 2011 at 10:52:48PM +0800, Wu Fengguang wrote: > > The estimation value will start from 100MB/s and adapt to the real > > bandwidth in seconds. > > > > It tries to update the bandwidth only when disk is fully utilized. > > Any inactive period of more than one second will be skipped. > > Is this piece of code being tested in your graphs? Are there any > inactive periods which get filtered out in your workload? I am > assuming in a continuous dd, we will not have periods of inactivity > 1 second long. There are no inactive periods in the dd tests. However I did try "watch cat /debug/bdi/8:0/stats" while starting some write workloads in background. When the write stops, the bandwidth does stop updating. Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
