Messages in this thread | | | From | "Luck, Tony" <> | Subject | RE: [LKP] Re: [x86/mce] 1de08dccd3: will-it-scale.per_process_ops -14.1% regression | Date | Wed, 19 Aug 2020 02:23:11 +0000 |
| |
0000000000019260 D pqr_state
Do you have /sys/fs/resctrl mounted? This variable is read on every context switch. If your benchmark does a lot of context switching and this now shares a cache line with something different (especially something that is sometimes modified from another CPU) that could cause some cache line bouncing.
-Tony
| |