I am trying legacy GCC versions. But I am not able to try different architectures.
2015-04-07 14:43 GMT+08:00 Mike Galbraith <umgwanakikb...@gmail.com>: > On Tue, 2015-04-07 at 11:37 +0800, Pengfei Yuan wrote: >> Hi, >> >> I have conducted some experiments to compare kernels built with -O2 >> and -O3. Here are the results: >> >> Application Performance O2 Performance O3 Improvement >> Apache 127814.14 req/s 130321.24 req/s 1.96% >> Nginx 537589.08 req/s 556723.32 req/s 3.56% >> MySQL 70661.38 tx/s 71008.47 tx/s 0.49% >> PostgreSQL 79763.39 tx/s 79535.59 tx/s -0.29% >> Redis 352547.47 op/s 405417.24 op/s 15.0% >> Memcached 844439.14 op/s 845321.79 op/s 0.10% >> >> Geomean: +3.34% >> >> Experiment environment: Linux 3.19.3, GCC 4.9.3 prerelease, Core-i7 >> 4770, 32G RAM, 10GbE >> >> LMbench microbenchmark also shows reduction in various latencies, as >> well as increase of throughputs. > > Please show multiple run data for all permutations of supported gcc > version/arch ;-) > > -Mike -- 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/
