http://bugzilla.suse.com/show_bug.cgi?id=1131437 http://bugzilla.suse.com/show_bug.cgi?id=1131437#c20 --- Comment #20 from Giovanni Gherdovich <giovanni.gherdovich@suse.com> --- Created attachment 804345 --> http://bugzilla.suse.com/attachment.cgi?id=804345&action=edit second page extract from the full report Another page to show that the patterns described previously hold in general. Next I'm going to attach a 3rd page. The full report in the form of a multi-page PDF file is at https://w3.suse.de/~ggherdovich/BSC1131437/flipbook-dbench-2clients.pdf (~50 MB) Code and data for the plot is at https://gitlab.suse.de/ggherdovich/dbench-migrations Things I forgot to mention in the previous comment: * a shortcoming of this plots is that the xfs kworker journaling thread is not traced. I haven't thought yet at how to grab it; probably I could insert a static tracepoint in the XFS entry point and recognize the interesting kworker that way. After that is done, crossing data with pstate migration is the same as already done * tracing was done with systemtap being careful not to do any IO while the benchmark was running (all the arrays are kept in memory) * I verified the regression was present when collecting the data, i.e. tracing didn't interfere with the benchmark results -- You are receiving this mail because: You are on the CC list for the bug.