On 12 November 2015 at 23:02, Mark Brown <broonie@xxxxxxxxxx> wrote: > On Thu, Nov 12, 2015 at 01:57:27PM +0100, Arnd Bergmann wrote: >> On Thursday 12 November 2015 20:51:10 Baolin Wang wrote: > >> > But it maybe not enough for HW engine which can handle maybe 10M/20M >> > at one time. > >> Given that you have already done measurements, can you find out how much >> you lose in overall performance with your existing patch if you artificially >> limit the maximum size to sizes like 256kb, 1MB, 4MB, ...? > > It's probably also worth looking at the impact on CPU utilisation as > well as throughput in your benchmarking since the system will often not > be idle when it's doing a lot of I/O - I know you've done some > measurements in that area before, including them when looking at block > sizes might be interesting. Make sense. -- Baolin.wang Best Regards -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
