On Tue, Sep 25, 2012 at 03:17:36PM +0200, Borislav Petkov wrote: > For example, I did some measurements a couple of days ago on Bulldozer > of tbench with and without select_idle_sibling:
Here are updated benchmark results with your patch here: http://marc.info/?l=linux-kernel&m=134850871822587 I think this pretty much confirms Mel's results. tbench runs single-socket OR-B (box has 8 cores, 4 CUs) (tbench_srv localhost), tbench default settings as in debian testing # clients 1 2 4 8 12 16 3.6-rc6+tip/auto-latest 115.91 238.571 469.606 1865.77 1863.08 1851.46 3.6-rc6+tip/auto-latest-kill select_idle_sibling(): 354.619 534.714 900.069 1969.35 1955.91 1940.84 3.6-rc6+tip/auto-latest-revert-the-revert 114.001 223.171 408.507 1771.48 1757.08 1736.12 3.6-rc7+tip/auto-latest-select_idle_sibling-lists 107.39 222.439 435.255 1659.42 1697.43 1685.92 3.6-rc6+tip/auto-latest ----------------------- Throughput 115.91 MB/sec 1 clients 1 procs max_latency=0.296 ms Throughput 238.571 MB/sec 2 clients 2 procs max_latency=1.296 ms Throughput 469.606 MB/sec 4 clients 4 procs max_latency=0.340 ms Throughput 1865.77 MB/sec 8 clients 8 procs max_latency=3.393 ms Throughput 1863.08 MB/sec 12 clients 12 procs max_latency=0.322 ms Throughput 1851.46 MB/sec 16 clients 16 procs max_latency=2.059 ms 3.6-rc6+tip/auto-latest-kill select_idle_sibling() -------------------------------------------------- Throughput 354.619 MB/sec 1 clients 1 procs max_latency=0.321 ms Throughput 534.714 MB/sec 2 clients 2 procs max_latency=2.651 ms Throughput 900.069 MB/sec 4 clients 4 procs max_latency=10.823 ms Throughput 1969.35 MB/sec 8 clients 8 procs max_latency=1.630 ms Throughput 1955.91 MB/sec 12 clients 12 procs max_latency=3.236 ms Throughput 1940.84 MB/sec 16 clients 16 procs max_latency=0.314 ms 3.6-rc6+tip/auto-latest-revert-the-revert ----------------------------------------- Throughput 114.001 MB/sec 1 clients 1 procs max_latency=0.352 ms Throughput 223.171 MB/sec 2 clients 2 procs max_latency=0.348 ms Throughput 408.507 MB/sec 4 clients 4 procs max_latency=0.388 ms Throughput 1771.48 MB/sec 8 clients 8 procs max_latency=0.280 ms Throughput 1757.08 MB/sec 12 clients 12 procs max_latency=3.280 ms Throughput 1736.12 MB/sec 16 clients 16 procs max_latency=0.333 ms 3.6-rc7+tip/auto-latest-select_idle_sibling-lists ------------------------------------------------- Throughput 107.39 MB/sec 1 clients 1 procs max_latency=0.372 ms Throughput 222.439 MB/sec 2 clients 2 procs max_latency=0.345 ms Throughput 435.255 MB/sec 4 clients 4 procs max_latency=0.346 ms Throughput 1659.42 MB/sec 8 clients 8 procs max_latency=3.497 ms Throughput 1697.43 MB/sec 12 clients 12 procs max_latency=3.205 ms Throughput 1685.92 MB/sec 16 clients 16 procs max_latency=0.331 ms -- Regards/Gruss, Boris. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
