On Wed, Jun 19, 2013 at 10:09 PM, Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> wrote: > On Mon, Jun 17, 2013 at 02:20:05PM +0800, Bob Liu wrote: >> Hi Seth, >> >> On Tue, Jun 4, 2013 at 4:33 AM, Seth Jennings >> <sjenning@xxxxxxxxxxxxxxxxxx> wrote: >> > zswap is a thin backend for frontswap that takes pages that are in the process >> > of being swapped out and attempts to compress them and store them in a >> > RAM-based memory pool. This can result in a significant I/O reduction on the >> > swap device and, in the case where decompressing from RAM is faster than >> > reading from the swap device, can also improve workload performance. >> > >> > It also has support for evicting swap pages that are currently compressed in >> > zswap to the swap device on an LRU(ish) basis. This functionality makes zswap a >> > true cache in that, once the cache is full, the oldest pages can be moved out >> > of zswap to the swap device so newer pages can be compressed and stored in >> > zswap. >> > >> > This patch adds the zswap driver to mm/ >> > >> >> Do you have any more benchmark can share with me ? To figure out that >> we can benefit from zswap. > > The two I've done or kernbench and SPECjbb. I'm trying out the memtests Thanks, I'll try to setup them. > now. I'd like to be able to explain the numbers you are seeing at least. > > Sorry for the delay. I'll get back to you once I've figured out how > to using mmtests and get some results/explanations. > > Also, how much physical RAM did this box have? I see 2G in the profile name > but not sure if that is the workload size or the RAM size. I seems that the 2G RAM size. > test is overcommitted from the beginning as indicated by the swap activity. > I know that the parallelio-memcachetest default profile only uses 80% of > physical memory, so you have apparently made a change yes? > No, I just "cp configs/config-global-dhp__parallelio-memcachetest config" and then run mmtests.sh with monitor. I'm using mmtests version 0.10. -- Regards, --Bob -- 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>