From: David Laight > Sent: 16 January 2020 14:41 > > I'll do some measurements later this afternoon. > > This is an Ivy bridge cpu, so clflush (not clflushopt). > With a cond_resched for every page I get: > (Note these calls are every 10 seconds....) For comparison some times booted with the original drm.ko 1) # 3125.116 us | drm_clflush_sg [drm](); 0) # 3181.705 us | drm_clflush_sg [drm](); 1) # 3108.863 us | drm_clflush_sg [drm](); 1) # 3051.926 us | drm_clflush_sg [drm](); 2) # 3088.468 us | drm_clflush_sg [drm](); 2) # 3012.729 us | drm_clflush_sg [drm](); 2) # 3191.268 us | drm_clflush_sg [drm](); 3) # 3044.294 us | drm_clflush_sg [drm](); 0) # 3163.916 us | drm_clflush_sg [drm](); 2) # 3029.307 us | drm_clflush_sg [drm](); 2) # 3116.360 us | drm_clflush_sg [drm](); 2) # 3031.620 us | drm_clflush_sg [drm](); 0) # 3349.706 us | drm_clflush_sg [drm](); Probably nothing really significant. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales) _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
