Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-10-01 Thread Jeff Layton
On Thu, 1 Oct 2015 09:17:42 +1000 Dave Chinner wrote: > On Wed, Sep 30, 2015 at 06:03:59AM -0400, Jeff Layton wrote: > > Thanks for testing it and catching the problem in the first place! > > > > FWIW, the problem seems to have been bad hash distribution generated by > > hash_ptr on struct inode

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-30 Thread J. Bruce Fields
On Thu, Oct 01, 2015 at 09:17:42AM +1000, Dave Chinner wrote: > Inode pointers have no entropy in the lower 9-10 bits because of > their size, and being allocated from a slab they are all going to > have the same set of values in the next 3-4 bits (i.e. offset into > the slab page which is defined

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-30 Thread Dave Chinner
On Wed, Sep 30, 2015 at 06:03:59AM -0400, Jeff Layton wrote: > Thanks for testing it and catching the problem in the first place! > > FWIW, the problem seems to have been bad hash distribution generated by > hash_ptr on struct inode pointers. When the cache had ~1 entries in > it total, one of

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-30 Thread Jeff Layton
On Wed, 30 Sep 2015 16:35:58 +0800 "Huang\, Ying" wrote: > Jeff Layton writes: > > > On Wed, 30 Sep 2015 07:27:54 +0800 > > "Huang\, Ying" wrote: > > > >> Jeff Layton writes: > >> > >> > On Mon, 28 Sep 2015 14:49:32 +0800 > >> > kernel test robot wrote: > >> > > >> >> FYI, we noticed the be

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-30 Thread Huang, Ying
Jeff Layton writes: > On Wed, 30 Sep 2015 07:27:54 +0800 > "Huang\, Ying" wrote: > >> Jeff Layton writes: >> >> > On Mon, 28 Sep 2015 14:49:32 +0800 >> > kernel test robot wrote: >> > >> >> FYI, we noticed the below changes on >> >> >> >> =

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-29 Thread Jeff Layton
On Wed, 30 Sep 2015 07:27:54 +0800 "Huang\, Ying" wrote: > Jeff Layton writes: > > > On Mon, 28 Sep 2015 14:49:32 +0800 > > kernel test robot wrote: > > > >> FYI, we noticed the below changes on > >> > >>

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-29 Thread Huang, Ying
Jeff Layton writes: > On Mon, 28 Sep 2015 14:49:32 +0800 > kernel test robot wrote: > >> FYI, we noticed the below changes on >> >> = >> tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/iteration

Re: [lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-29 Thread Jeff Layton
On Mon, 28 Sep 2015 14:49:32 +0800 kernel test robot wrote: > FYI, we noticed the below changes on > > = > tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/iterations/nr_threads/disk/fs/fs2/filesi

[lkp] [nfsd] 4aac1bf05b: -2.9% fsmark.files_per_sec

2015-09-27 Thread kernel test robot
FYI, we noticed the below changes on = tbox_group/testcase/rootfs/kconfig/compiler/cpufreq_governor/iterations/nr_threads/disk/fs/fs2/filesize/test_size/sync_method/nr_directories/nr_files_per_directory: lkp