Messages in this thread | | | Date | Wed, 27 Apr 2016 17:10:59 +0900 | From | Sergey Senozhatsky <> | Subject | Re: zram: per-cpu compression streams |
| |
On (04/27/16 16:55), Minchan Kim wrote: [..] > > > Could you test concurrent mem hogger with fio rather than pre-fault before fio test > > > in next submit? > > > > this test will not prove anything, unfortunately. I performed it; > > and it's impossible to guarantee even remotely stable results. > > mem-hogger process can spend on pre-fault from 41 to 81 seconds; > > so I'm quite sceptical about the actual value of this test. > > > > > > considering buffer_compress_percentage=11, the box was under somewhat > > > > heavy pressure. > > > > > > > > now, the results > > > > > > Yeb, Even, recompression case is fater than old but want to see more heavy memory > > > pressure case and the ratio I mentioned above. > > > > I did quite heavy testing over the last 7 days, with numerous OOM kills > > and OOM panics. > > Okay, I think it's worth to merge enough and see the result. > Please send formal patch which has recompression stat. ;-)
correction: those 41-81s spikes in mem-hogger were observed under different scenario: 10GB zram with 6GB mem-hogger on a 4GB system.
I'll do another round of tests (with parallel mem-hogger pre-fault and 4GB/4GB zram/mem-hogger split) and collect the number that you asked for.
thanks!
-ss
| |