Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-31 Thread Randy Dunlap
On 03/31/17 03:03, Radu Rendec wrote: > On Wed, 2017-03-29 at 20:05 +0200, Ingo Molnar wrote: >> * Randy Dunlap wrote: >> >>> On 03/28/17 10:17, Radu Rendec wrote: Does anyone still have a copy of Ingo Molnar's mmap-perf.c program (the old link is broken)?

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-31 Thread Randy Dunlap
On 03/31/17 03:03, Radu Rendec wrote: > On Wed, 2017-03-29 at 20:05 +0200, Ingo Molnar wrote: >> * Randy Dunlap wrote: >> >>> On 03/28/17 10:17, Radu Rendec wrote: Does anyone still have a copy of Ingo Molnar's mmap-perf.c program (the old link is broken)? Would it still be

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-31 Thread Radu Rendec
On Wed, 2017-03-29 at 20:05 +0200, Ingo Molnar wrote: > * Randy Dunlap wrote: > > > On 03/28/17 10:17, Radu Rendec wrote: > > > Does anyone still have a copy of Ingo Molnar's mmap-perf.c > > > program (the > > > old link is broken)? Would it still be relevant to use it for

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-31 Thread Radu Rendec
On Wed, 2017-03-29 at 20:05 +0200, Ingo Molnar wrote: > * Randy Dunlap wrote: > > > On 03/28/17 10:17, Radu Rendec wrote: > > > Does anyone still have a copy of Ingo Molnar's mmap-perf.c > > > program (the > > > old link is broken)? Would it still be relevant to use it for > > > measuring > > >

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-29 Thread Ingo Molnar
* Randy Dunlap wrote: > On 03/28/17 10:17, Radu Rendec wrote: > > Hi, > > > > I'm trying to assess the performance impact of enabling PARAVIRT (and > > XEN) in a custom kernel configuration. I came across a very old thread > > (https://lkml.org/lkml/2009/5/13/449) on

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-29 Thread Ingo Molnar
* Randy Dunlap wrote: > On 03/28/17 10:17, Radu Rendec wrote: > > Hi, > > > > I'm trying to assess the performance impact of enabling PARAVIRT (and > > XEN) in a custom kernel configuration. I came across a very old thread > > (https://lkml.org/lkml/2009/5/13/449) on this topic and the

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-29 Thread Randy Dunlap
On 03/28/17 10:17, Radu Rendec wrote: > Hi, > > I'm trying to assess the performance impact of enabling PARAVIRT (and > XEN) in a custom kernel configuration. I came across a very old thread > (https://lkml.org/lkml/2009/5/13/449) on this topic and the conclusion > back then was that the

Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-29 Thread Randy Dunlap
On 03/28/17 10:17, Radu Rendec wrote: > Hi, > > I'm trying to assess the performance impact of enabling PARAVIRT (and > XEN) in a custom kernel configuration. I came across a very old thread > (https://lkml.org/lkml/2009/5/13/449) on this topic and the conclusion > back then was that the

Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-28 Thread Radu Rendec
Hi, I'm trying to assess the performance impact of enabling PARAVIRT (and XEN) in a custom kernel configuration. I came across a very old thread (https://lkml.org/lkml/2009/5/13/449) on this topic and the conclusion back then was that the performance impact was (arguably) around 1%. Does anyone

Impact of CONFIG_PARAVIRT=y / mmap benchmark

2017-03-28 Thread Radu Rendec
Hi, I'm trying to assess the performance impact of enabling PARAVIRT (and XEN) in a custom kernel configuration. I came across a very old thread (https://lkml.org/lkml/2009/5/13/449) on this topic and the conclusion back then was that the performance impact was (arguably) around 1%. Does anyone