Re: Potential scheduler regression

On Fri, Jul 14, 2017 at 08:54:07AM +0200, Greg KH wrote: > On Thu, Jul 13, 2017 at 03:24:02PM -0400, Ben Guthro wrote: > > On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > > > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > > >> > > >> * Ben Guthro

Re: Potential scheduler regression

On Fri, Jul 14, 2017 at 08:54:07AM +0200, Greg KH wrote: > On Thu, Jul 13, 2017 at 03:24:02PM -0400, Ben Guthro wrote: > > On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > > > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > > >> > > >> * Ben Guthro wrote: > > >> > > >> > > If

Re: Potential scheduler regression

On Thu, Jul 13, 2017 at 03:24:02PM -0400, Ben Guthro wrote: > On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > >> > >> * Ben Guthro wrote: > >> > >> > > If people have experience with

Re: Potential scheduler regression

On Thu, Jul 13, 2017 at 03:24:02PM -0400, Ben Guthro wrote: > On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > >> > >> * Ben Guthro wrote: > >> > >> > > If people have experience with these in the "enterprise" distros, or > >> >

Re: Potential scheduler regression

On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: >> >> * Ben Guthro wrote: >> >> > > If people have experience with these in the "enterprise" distros, or any >> > > other >> > > tree, and

Re: Potential scheduler regression

On Tue, Jul 11, 2017 at 5:55 AM, Greg KH wrote: > On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: >> >> * Ben Guthro wrote: >> >> > > If people have experience with these in the "enterprise" distros, or any >> > > other >> > > tree, and want to provide me with backported, and

Re: Potential scheduler regression

On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > > * Ben Guthro wrote: > > > > If people have experience with these in the "enterprise" distros, or any > > > other > > > tree, and want to provide me with backported, and tested, patches, I'll > > > be > > >

Re: Potential scheduler regression

On Tue, Jul 11, 2017 at 10:30:14AM +0200, Ingo Molnar wrote: > > * Ben Guthro wrote: > > > > If people have experience with these in the "enterprise" distros, or any > > > other > > > tree, and want to provide me with backported, and tested, patches, I'll > > > be > > > glad to consider

Re: Potential scheduler regression

* Ben Guthro wrote: > > If people have experience with these in the "enterprise" distros, or any > > other > > tree, and want to provide me with backported, and tested, patches, I'll be > > glad to consider them for stable kernels. > > > > thanks, > > > > greg k-h > > I

Re: Potential scheduler regression

* Ben Guthro wrote: > > If people have experience with these in the "enterprise" distros, or any > > other > > tree, and want to provide me with backported, and tested, patches, I'll be > > glad to consider them for stable kernels. > > > > thanks, > > > > greg k-h > > I tried to do a simple

Re: Potential scheduler regression

On Mon, Jul 10, 2017 at 11:26 AM, Greg KH wrote: > On Mon, Jul 10, 2017 at 11:25:32AM +0200, Peter Zijlstra wrote: >> On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: >> >> > Apologies on the delay - it took a bit to get the machines, to run the >> > test.

Re: Potential scheduler regression

On Mon, Jul 10, 2017 at 11:26 AM, Greg KH wrote: > On Mon, Jul 10, 2017 at 11:25:32AM +0200, Peter Zijlstra wrote: >> On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: >> >> > Apologies on the delay - it took a bit to get the machines, to run the >> > test. >> > >> > I am happy to

Re: Potential scheduler regression

On Mon, Jul 10, 2017 at 11:25:32AM +0200, Peter Zijlstra wrote: > On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: > > > Apologies on the delay - it took a bit to get the machines, to run the test. > > > > I am happy to report that the kernel at 1ad3aaf3fcd2, seems to regain > >

Re: Potential scheduler regression

On Mon, Jul 10, 2017 at 11:25:32AM +0200, Peter Zijlstra wrote: > On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: > > > Apologies on the delay - it took a bit to get the machines, to run the test. > > > > I am happy to report that the kernel at 1ad3aaf3fcd2, seems to regain > >

Re: Potential scheduler regression

On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: > Apologies on the delay - it took a bit to get the machines, to run the test. > > I am happy to report that the kernel at 1ad3aaf3fcd2, seems to regain > performance loss from 1b568f0aab, in our test environment. Excellent. > Since

Re: Potential scheduler regression

On Fri, Jul 07, 2017 at 04:55:27PM -0400, Ben Guthro wrote: > Apologies on the delay - it took a bit to get the machines, to run the test. > > I am happy to report that the kernel at 1ad3aaf3fcd2, seems to regain > performance loss from 1b568f0aab, in our test environment. Excellent. > Since

Re: Potential scheduler regression

On Wed, Jul 5, 2017 at 12:48 PM, Peter Zijlstra wrote: > On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote: >> Hello, >> >> I've been in the process of updating our kernel in our appliance VM >> from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y)

Re: Potential scheduler regression

On Wed, Jul 5, 2017 at 12:48 PM, Peter Zijlstra wrote: > On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote: >> Hello, >> >> I've been in the process of updating our kernel in our appliance VM >> from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y) >> - and ran into a

Re: Potential scheduler regression

On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote: > Hello, > > I've been in the process of updating our kernel in our appliance VM > from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y) > - and ran into a performance regression, when our QA team was running > some

Re: Potential scheduler regression

On Wed, Jul 05, 2017 at 11:42:46AM -0400, Ben Guthro wrote: > Hello, > > I've been in the process of updating our kernel in our appliance VM > from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y) > - and ran into a performance regression, when our QA team was running > some

Potential scheduler regression

Hello, I've been in the process of updating our kernel in our appliance VM from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y) - and ran into a performance regression, when our QA team was running some regression suites. I bisect this behavior to the following commit,

Potential scheduler regression

Hello, I've been in the process of updating our kernel in our appliance VM from an old LTS kernel (4.1.y) to something a bit more modern (4.9.y) - and ran into a performance regression, when our QA team was running some regression suites. I bisect this behavior to the following commit,