Re: [HACKERS] strange case of kernel performance regression (4.3.x and newer)

2016-12-05 Thread Catalin Iacob
On Wed, Oct 5, 2016 at 8:18 AM, Tomas Vondra wrote: > Over the past couple of days I've been doing a bit of benchmarking for the > "group clog" patch [1], and I've ran into what I suspect might be a fairly > serious performance regression on newer kernels

[HACKERS] strange case of kernel performance regression (4.3.x and newer)

2016-10-05 Thread Tomas Vondra
Hi, Over the past couple of days I've been doing a bit of benchmarking for the "group clog" patch [1], and I've ran into what I suspect might be a fairly serious performance regression on newer kernels (essentially 4.3.0 and newer). I got to a point where I need help with further