On Tue, 16 Jun 2015 16:28:06 +0900 Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> wrote: > Is this really better than just calling __kmem_cache_free_bulk()? Yes, as can be seen by cover-letter, but my cover-letter does not seem to have reached mm-list. Measurements for the entire patchset: Bulk - Fallback bulking - fastpath-bulking 1 - 47 cycles(tsc) 11.921 ns - 45 cycles(tsc) 11.461 ns improved 4.3% 2 - 46 cycles(tsc) 11.649 ns - 28 cycles(tsc) 7.023 ns improved 39.1% 3 - 46 cycles(tsc) 11.550 ns - 22 cycles(tsc) 5.671 ns improved 52.2% 4 - 45 cycles(tsc) 11.398 ns - 19 cycles(tsc) 4.967 ns improved 57.8% 8 - 45 cycles(tsc) 11.303 ns - 17 cycles(tsc) 4.298 ns improved 62.2% 16 - 44 cycles(tsc) 11.221 ns - 17 cycles(tsc) 4.423 ns improved 61.4% 30 - 75 cycles(tsc) 18.894 ns - 57 cycles(tsc) 14.497 ns improved 24.0% 32 - 73 cycles(tsc) 18.491 ns - 56 cycles(tsc) 14.227 ns improved 23.3% 34 - 75 cycles(tsc) 18.962 ns - 58 cycles(tsc) 14.638 ns improved 22.7% 48 - 80 cycles(tsc) 20.049 ns - 64 cycles(tsc) 16.247 ns improved 20.0% 64 - 87 cycles(tsc) 21.929 ns - 74 cycles(tsc) 18.598 ns improved 14.9% 128 - 98 cycles(tsc) 24.511 ns - 89 cycles(tsc) 22.295 ns improved 9.2% 158 - 101 cycles(tsc) 25.389 ns - 93 cycles(tsc) 23.390 ns improved 7.9% 250 - 104 cycles(tsc) 26.170 ns - 100 cycles(tsc) 25.112 ns improved 3.8% I'll do a compare against the previous patch, and post the results. -- Best regards, Jesper Dangaard Brouer MSc.CS, Sr. Network Kernel Developer at Red Hat Author of http://www.iptv-analyzer.org LinkedIn: http://www.linkedin.com/in/brouer -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>