Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Feng Tang
On Tue, Jan 19, 2021 at 04:33:50PM +0100, Borislav Petkov wrote: > On Tue, Jan 19, 2021 at 11:09:03PM +0800, Feng Tang wrote: > > Yes, that can happen. I started a 4 tasks netperf on a 4C/8T KBL desktop, > > and also saw around 2% improvement. Both the kernel config and the > > platform matters. >

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Feng Tang
Hi Boris, On Tue, Jan 19, 2021 at 02:17:59PM +0100, Borislav Petkov wrote: > On Tue, Jan 19, 2021 at 08:15:05PM +0800, Feng Tang wrote: > > On Tue, Jan 19, 2021 at 11:02:55AM +0100, Borislav Petkov wrote: > > > On Mon, Jan 18, 2021 at 08:27:21PM -0800, Paul E. McKenney wrote: > > > > I bet that

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Borislav Petkov
On Tue, Jan 19, 2021 at 11:09:03PM +0800, Feng Tang wrote: > Yes, that can happen. I started a 4 tasks netperf on a 4C/8T KBL desktop, > and also saw around 2% improvement. Both the kernel config and the > platform matters. Oh great. ;-\ > For the performance changes I have checked, sometimes

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Borislav Petkov
On Tue, Jan 19, 2021 at 08:15:05PM +0800, Feng Tang wrote: > On Tue, Jan 19, 2021 at 11:02:55AM +0100, Borislav Petkov wrote: > > On Mon, Jan 18, 2021 at 08:27:21PM -0800, Paul E. McKenney wrote: > > > I bet that the results vary depending on the type of CPU, and also on > > > the kernel

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Feng Tang
On Tue, Jan 19, 2021 at 11:02:55AM +0100, Borislav Petkov wrote: > On Mon, Jan 18, 2021 at 08:27:21PM -0800, Paul E. McKenney wrote: > > I bet that the results vary depending on the type of CPU, and also on > > the kernel address-space layout, which of course also varies based on > > the Kconfig

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-19 Thread Borislav Petkov
On Mon, Jan 18, 2021 at 08:27:21PM -0800, Paul E. McKenney wrote: > I bet that the results vary depending on the type of CPU, and also on > the kernel address-space layout, which of course also varies based on > the Kconfig options. Let's see how the maintainers would like to proceed. So I ran

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-18 Thread Paul E. McKenney
On Sun, Jan 17, 2021 at 12:09:21AM +0800, Feng Tang wrote: > On Sat, Jan 16, 2021 at 07:34:26AM -0800, Paul E. McKenney wrote: > > On Sat, Jan 16, 2021 at 11:52:51AM +0800, Feng Tang wrote: > > > Hi Boris, > > > > > > On Tue, Jan 12, 2021 at 03:14:38PM +0100, Borislav Petkov wrote: > > > > On

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-16 Thread Feng Tang
On Sat, Jan 16, 2021 at 07:34:26AM -0800, Paul E. McKenney wrote: > On Sat, Jan 16, 2021 at 11:52:51AM +0800, Feng Tang wrote: > > Hi Boris, > > > > On Tue, Jan 12, 2021 at 03:14:38PM +0100, Borislav Petkov wrote: > > > On Tue, Jan 12, 2021 at 10:21:09PM +0800, kernel test robot wrote: > > > > >

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-16 Thread Paul E. McKenney
On Sat, Jan 16, 2021 at 11:52:51AM +0800, Feng Tang wrote: > Hi Boris, > > On Tue, Jan 12, 2021 at 03:14:38PM +0100, Borislav Petkov wrote: > > On Tue, Jan 12, 2021 at 10:21:09PM +0800, kernel test robot wrote: > > > > > > Greeting, > > > > > > FYI, we noticed a -4.5% regression of

Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression

2021-01-12 Thread Borislav Petkov
On Tue, Jan 12, 2021 at 10:21:09PM +0800, kernel test robot wrote: > > Greeting, > > FYI, we noticed a -4.5% regression of netperf.Throughput_tps due to commit: > > > commit: 7bb39313cd6239e7eb95198950a02b4ad2a08316 ("x86/mce: Make > mce_timed_out() identify holdout CPUs") >