Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-20 Thread Bob Liu
On 02/18/2014 04:01 PM, Yuanhan Liu wrote: > Hi, > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > kswapd") caused a big performance regression(73%) for vm-scalability/ > lru-file-readonce testcase on a system with 256G memory without swap. > > That testcase simply

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-18 Thread Hugh Dickins
On Tue, 18 Mar 2014, Yuanhan Liu wrote: > On Sat, Mar 15, 2014 at 08:56:10PM -0700, Hugh Dickins wrote: > > On Fri, 14 Mar 2014, Mel Gorman wrote: > > > > > > You say it's already been tested for months but it would be nice if the > > > workload that generated this thread was also tested. > > > >

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-17 Thread Yuanhan Liu
On Sat, Mar 15, 2014 at 08:56:10PM -0700, Hugh Dickins wrote: > On Fri, 14 Mar 2014, Mel Gorman wrote: > > On Thu, Mar 13, 2014 at 05:44:57AM -0700, Hugh Dickins wrote: > > > On Wed, 12 Mar 2014, Mel Gorman wrote: > > > > On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: ... snip ... >

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-15 Thread Hugh Dickins
On Fri, 14 Mar 2014, Mel Gorman wrote: > On Thu, Mar 13, 2014 at 05:44:57AM -0700, Hugh Dickins wrote: > > On Wed, 12 Mar 2014, Mel Gorman wrote: > > > On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > > > > Hi, > > > > > > > > Commit e82e0561("mm: vmscan: obey proportional scanning r

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-14 Thread Mel Gorman
On Thu, Mar 13, 2014 at 05:44:57AM -0700, Hugh Dickins wrote: > On Wed, 12 Mar 2014, Mel Gorman wrote: > > On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > > > Hi, > > > > > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > > > kswapd") caused a big perform

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-13 Thread Yuanhan Liu
On Wed, Mar 12, 2014 at 04:54:47PM +, Mel Gorman wrote: > On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > > Hi, > > > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > > kswapd") caused a big performance regression(73%) for vm-scalability/ > > lru-file

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-13 Thread Hugh Dickins
On Wed, 12 Mar 2014, Mel Gorman wrote: > On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > > Hi, > > > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > > kswapd") caused a big performance regression(73%) for vm-scalability/ > > lru-file-readonce testcase on

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-12 Thread Mel Gorman
On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > Hi, > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > kswapd") caused a big performance regression(73%) for vm-scalability/ > lru-file-readonce testcase on a system with 256G memory without swap. > > That

Re: performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-03-07 Thread Yuanhan Liu
ping... On Tue, Feb 18, 2014 at 04:01:22PM +0800, Yuanhan Liu wrote: > Hi, > > Commit e82e0561("mm: vmscan: obey proportional scanning requirements for > kswapd") caused a big performance regression(73%) for vm-scalability/ > lru-file-readonce testcase on a system with 256G memory without swap. >

performance regression due to commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd")

2014-02-18 Thread Yuanhan Liu
Hi, Commit e82e0561("mm: vmscan: obey proportional scanning requirements for kswapd") caused a big performance regression(73%) for vm-scalability/ lru-file-readonce testcase on a system with 256G memory without swap. That testcase simply looks like this: truncate -s 1T /tmp/vm-scalability.im