On Fri, Feb 17, 2017 at 04:54:47PM +0530, Anshuman Khandual wrote: > This patch series is base on the work posted by Zi Yan back in > November 2016 (https://lkml.org/lkml/2016/11/22/457) but includes some > amount clean up and re-organization. This series depends on THP migration > optimization patch series posted by Naoya Horiguchi on 8th November 2016 > (https://lwn.net/Articles/705879/). Though Zi Yan has recently reposted > V3 of the THP migration patch series (https://lwn.net/Articles/713667/), > this series is yet to be rebased. > > Primary motivation behind this patch series is to achieve higher > bandwidth of memory migration when ever possible using multi threaded > instead of a single threaded copy. Did all the experiments using a two > socket X86 sytsem (Intel(R) Xeon(R) CPU E5-2650). All the experiments > here have same allocation size 4K * 100000 (which did not split evenly > for the 2MB huge pages). Here are the results. > > Vanilla: > > Moved 100000 normal pages in 247.000000 msecs 1.544412 GBs > Moved 100000 normal pages in 238.000000 msecs 1.602814 GBs > Moved 195 huge pages in 252.000000 msecs 1.513769 GBs > Moved 195 huge pages in 257.000000 msecs 1.484318 GBs > > THP migration improvements: > > Moved 100000 normal pages in 302.000000 msecs 1.263145 GBs Is there a decrease here for normal pages? > Moved 100000 normal pages in 262.000000 msecs 1.455991 GBs > Moved 195 huge pages in 120.000000 msecs 3.178914 GBs > Moved 195 huge pages in 129.000000 msecs 2.957130 GBs > > THP migration improvements + Multi threaded page copy: > > Moved 100000 normal pages in 1589.000000 msecs 0.240069 GBs ** Ditto? > Moved 100000 normal pages in 1932.000000 msecs 0.197448 GBs ** > Moved 195 huge pages in 54.000000 msecs 7.064254 GBs *** > Moved 195 huge pages in 86.000000 msecs 4.435694 GBs *** > Could you also comment on the CPU utilization impact of these patches. Balbir Singh. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
