This patchset implements bulking for the SLAB allocator. I split the implementation into two patches, the alloc and free "side" for easier review. (Based on Linus tree at v4.4-rc3-24-g25364a9e54fb) Normal SLAB fastpath 95 cycles(tsc) 23.852 ns, when compiled without debugging options enabled. Benchmarked[1] obj size 256 bytes on CPU i7-4790K @ 4.00GHz: 1 - 115 cycles(tsc) 28.812 ns - 42 cycles(tsc) 10.715 ns - improved 63.5% 2 - 103 cycles(tsc) 25.956 ns - 27 cycles(tsc) 6.985 ns - improved 73.8% 3 - 101 cycles(tsc) 25.336 ns - 22 cycles(tsc) 5.733 ns - improved 78.2% 4 - 100 cycles(tsc) 25.147 ns - 21 cycles(tsc) 5.319 ns - improved 79.0% 8 - 98 cycles(tsc) 24.616 ns - 18 cycles(tsc) 4.620 ns - improved 81.6% 16 - 97 cycles(tsc) 24.408 ns - 17 cycles(tsc) 4.344 ns - improved 82.5% 30 - 98 cycles(tsc) 24.641 ns - 16 cycles(tsc) 4.202 ns - improved 83.7% 32 - 98 cycles(tsc) 24.607 ns - 16 cycles(tsc) 4.199 ns - improved 83.7% 34 - 98 cycles(tsc) 24.605 ns - 18 cycles(tsc) 4.579 ns - improved 81.6% 48 - 97 cycles(tsc) 24.463 ns - 17 cycles(tsc) 4.405 ns - improved 82.5% 64 - 97 cycles(tsc) 24.370 ns - 17 cycles(tsc) 4.384 ns - improved 82.5% 128 - 99 cycles(tsc) 24.763 ns - 19 cycles(tsc) 4.755 ns - improved 80.8% 158 - 98 cycles(tsc) 24.708 ns - 18 cycles(tsc) 4.723 ns - improved 81.6% 250 - 101 cycles(tsc) 25.342 ns - 20 cycles(tsc) 5.035 ns - improved 80.2% [1] https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test01.c --- Jesper Dangaard Brouer (2): slab: implement bulk alloc in SLAB allocator slab: implement bulk free in SLAB allocator mm/slab.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 77 insertions(+), 8 deletions(-) -- -- 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>