Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-10-04 Thread Jon Masters
On 9/7/18 5:34 AM, Jirka Hladky wrote: > We would also be more than happy to test the new patches for the > performance - please let us know if you are interested. We have a > pool of 1 NUMA up to 8 NUMA boxes for that, both AMD and Intel, > covering different CPU generations from Sandy Bridge ti

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-17 Thread Jirka Hladky
Resending in the plain text mode. > I'm travelling at the moment but when I get back, I'll see what's in the > tip tree with respect to Srikar's patches and then rebase the fast-migration > patches on top and reconfirm they still behave as expected. Assuming > they do, I'll resend them. Sounds g

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-17 Thread Mel Gorman
On Fri, Sep 14, 2018 at 04:50:20PM +0200, Jirka Hladky wrote: > Hi Peter and Srikar, > > > I have bounced the 5 patches to you, (one of the 6 has not been applied by > > Peter) so I have skipped that. > > They can also be fetched from > > http://lore.kernel.org/lkml/1533276841-16341-1-git-send-ema

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-14 Thread Jirka Hladky
Hi Peter and Srikar, > I have bounced the 5 patches to you, (one of the 6 has not been applied by > Peter) so I have skipped that. > They can also be fetched from > http://lore.kernel.org/lkml/1533276841-16341-1-git-send-email-sri...@linux.vnet.ibm.com I'm sorry for the delay, we have finally the

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-09 Thread Jirka Hladky
Hi Peter and Srikar, thanks a lot for the information and for the patches to test! > I have bounced the 5 patches to you, (one of the 6 has not been applied by > Peter) so I have skipped that. > They can also be fetched from > http://lore.kernel.org/lkml/1533276841-16341-1-git-send-email-sri...@l

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-07 Thread Peter Zijlstra
On Fri, Sep 07, 2018 at 07:14:20PM +0530, Srikar Dronamraju wrote: > * Peter Zijlstra [2018-09-07 15:19:23]: > > > On Fri, Sep 07, 2018 at 06:26:49PM +0530, Srikar Dronamraju wrote: > > > > > Can you please pick > > > > > > > > > 1. 69bb3230297e881c797bbc4b3dbf73514078bc9d sched/numa: Stop mul

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-07 Thread Srikar Dronamraju
* Peter Zijlstra [2018-09-07 15:19:23]: > On Fri, Sep 07, 2018 at 06:26:49PM +0530, Srikar Dronamraju wrote: > > > Can you please pick > > > > > > 1. 69bb3230297e881c797bbc4b3dbf73514078bc9d sched/numa: Stop multiple tasks > > from moving to the cpu at the same time > > 2. dc62cfdac5e5b7a61cd8

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-07 Thread Peter Zijlstra
On Fri, Sep 07, 2018 at 06:26:49PM +0530, Srikar Dronamraju wrote: > Can you please pick > > > 1. 69bb3230297e881c797bbc4b3dbf73514078bc9d sched/numa: Stop multiple tasks > from moving to the cpu at the same time > 2. dc62cfdac5e5b7a61cd8a2bd4190e80b9bb408fc sched/numa: Avoid task migration > fo

Re: [SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-07 Thread Srikar Dronamraju
* Jirka Hladky [2018-09-07 11:34:49]: Hi Jirka, > > We have detected a significant performance drop (20% and more) with > 4.19rc1 relatively to 4.18 vanilla. We see the regression on different > 2 NUMA and 4 NUMA boxes with pretty much all the benchmarks we use - > NAS, Stream, SPECjbb2005, SPE

[SCHEDULER] Performance drop in 4.19 compared to 4.18 kernel

2018-09-07 Thread Jirka Hladky
Hi Srikar, I work at Red Hat in the Kernel Performance Team. I would like to ask you for help. We have detected a significant performance drop (20% and more) with 4.19rc1 relatively to 4.18 vanilla. We see the regression on different 2 NUMA and 4 NUMA boxes with pretty much all the benchmarks we