On Tue, Dec 10, 2019 at 03:44:52PM +0100, Hubert Feurstein wrote: > Hi, > > I've updated barebox for our custom platform from v2015.06.0 to > v2019.12.0. With the new version I have noticed a much worse write > performance onto the onboard eMMC. > > With v2015.06.0 the indicated progress of the copy command is very > smooth. Calling "cp -v /dev/zero /dev/mmc3.root" takes about 80 > seconds for 256MB. But with v2019.12.0 the progress is very bumpy and > the copy takes about 280 seconds. > > I've tracked this down to this commit which destroys the performance: > "block: Adjust cache sizes" (b6fef20c1215c6ef0004f6af4a9c4b77af51dc43) We could just revert this patch. I can't find any workload that gets faster with b6fef20c1215. It's rather the other way round. Sascha -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
