HI Dan, we noticed the below changes on git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata for-next commit 8a4aeec8d2d6a3edeffbdfae451cdf05cbf0fefd ("libata/ahci: accommodate tag ordered controllers") 2cf532f5e67c0cf 8a4aeec8d2d6a3edeffbdfae4 --------------- ------------------------- 88694337 ~39% +138.4% 2.115e+08 ~46% TOTAL perf-stat.dTLB-store-misses 217057 ~ 0% -31.3% 149221 ~ 3% TOTAL interrupts.46:PCI-MSI-edge.ahci 6.995e+08 ~20% +37.2% 9.598e+08 ~25% TOTAL perf-stat.dTLB-load-misses 110302 ~ 0% -28.9% 78402 ~ 2% TOTAL interrupts.CAL 3.168e+08 ~ 9% +14.5% 3.627e+08 ~10% TOTAL perf-stat.L1-dcache-prefetches 2.553e+09 ~12% +26.5% 3.228e+09 ~11% TOTAL perf-stat.LLC-loads 5.815e+08 ~ 6% +27.3% 7.403e+08 ~11% TOTAL perf-stat.LLC-stores 3.662e+09 ~11% +22.9% 4.501e+09 ~10% TOTAL perf-stat.L1-dcache-load-misses 2.155e+10 ~ 1% +8.3% 2.333e+10 ~ 1% TOTAL perf-stat.L1-dcache-store-misses 3.619e+10 ~ 1% +5.9% 3.832e+10 ~ 2% TOTAL perf-stat.cache-references 1.605e+10 ~ 1% +4.3% 1.674e+10 ~ 1% TOTAL perf-stat.L1-icache-load-misses 239691 ~ 7% -8.4% 219537 ~ 1% TOTAL interrupts.RES 3483 ~ 0% -5.4% 3297 ~ 0% TOTAL vmstat.system.in 2.748e+08 ~ 1% +4.3% 2.865e+08 ~ 0% TOTAL perf-stat.cache-misses 98935369 ~ 0% +4.9% 1.038e+08 ~ 0% TOTAL perf-stat.LLC-store-misses 699 ~ 1% -3.7% 673 ~ 1% TOTAL iostat.sda.w_await 698 ~ 1% -3.7% 672 ~ 1% TOTAL iostat.sda.await 203893 ~ 0% +3.7% 211474 ~ 0% TOTAL iostat.sda.wkB/s 203972 ~ 0% +3.7% 211488 ~ 0% TOTAL vmstat.io.bo 618082 ~ 4% -4.6% 589619 ~ 1% TOTAL perf-stat.context-switches 1.432e+12 ~ 1% +3.0% 1.475e+12 ~ 0% TOTAL perf-stat.L1-icache-loads 3.35e+11 ~ 0% +3.2% 3.456e+11 ~ 0% TOTAL perf-stat.L1-dcache-stores 1.486e+12 ~ 0% +2.8% 1.527e+12 ~ 0% TOTAL perf-stat.iTLB-loads 3.006e+11 ~ 0% +2.6% 3.084e+11 ~ 0% TOTAL perf-stat.branch-instructions 1.793e+12 ~ 0% +2.8% 1.843e+12 ~ 0% TOTAL perf-stat.cpu-cycles 3.352e+11 ~ 1% +2.9% 3.451e+11 ~ 0% TOTAL perf-stat.dTLB-stores 2.994e+11 ~ 1% +3.1% 3.087e+11 ~ 0% TOTAL perf-stat.branch-loads 1.49e+12 ~ 0% +2.9% 1.533e+12 ~ 0% TOTAL perf-stat.instructions 5.48e+11 ~ 0% +2.8% 5.633e+11 ~ 0% TOTAL perf-stat.dTLB-loads 2.028e+11 ~ 1% +2.9% 2.086e+11 ~ 1% TOTAL perf-stat.bus-cycles 5.484e+11 ~ 0% +2.9% 5.644e+11 ~ 0% TOTAL perf-stat.L1-dcache-loads 1.829e+12 ~ 0% +2.7% 1.877e+12 ~ 1% TOTAL perf-stat.ref-cycles Legend: ~XX% - stddev percent [+-]XX% - change percent Attach full stats changes entries for reference. Thanks, Jet