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Diffstat (limited to 'libc/benchtests/bench-timing.h')
| -rw-r--r-- | libc/benchtests/bench-timing.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libc/benchtests/bench-timing.h b/libc/benchtests/bench-timing.h new file mode 100644 index 000000000..264d4b8ba --- /dev/null +++ b/libc/benchtests/bench-timing.h @@ -0,0 +1,72 @@ +/* Define timing macros. + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <hp-timing.h> +#include <stdint.h> + +#if HP_TIMING_AVAIL && !defined USE_CLOCK_GETTIME +# define GL(x) _##x +# define GLRO(x) _##x +hp_timing_t _dl_hp_timing_overhead; +typedef hp_timing_t timing_t; + +# define TIMING_INIT(iters) \ +({ \ + HP_TIMING_DIFF_INIT(); \ + (iters) = 1000; \ +}) + +# define TIMING_NOW(var) HP_TIMING_NOW (var) +# define TIMING_DIFF(diff, start, end) HP_TIMING_DIFF ((diff), (start), (end)) +# define TIMING_ACCUM(sum, diff) HP_TIMING_ACCUM_NT ((sum), (diff)) + +# define TIMING_PRINT_STATS(func, d_total_s, d_iters, d_total_i, max, min) \ + printf ("%s: ITERS:%g: TOTAL:%gMcy, MAX:%gcy, MIN:%gcy, %g calls/Mcy\n", \ + (func), (d_total_i), (d_total_s) * 1e-6, (max) / (d_iters), \ + (min) / (d_iters), 1e6 * (d_total_i) / (d_total_s)); + +#else +typedef uint64_t timing_t; + +/* Measure 1000 times the resolution of the clock. So for a 1ns + resolution clock, we measure 1000 iterations of the function call at a + time. Measurements close to the minimum clock resolution won't make + much sense, but it's better than having nothing at all. */ +# define TIMING_INIT(iters) \ +({ \ + struct timespec start; \ + clock_getres (CLOCK_PROCESS_CPUTIME_ID, &start); \ + (iters) = 1000 * start.tv_nsec; \ +}) + +# define TIMING_NOW(var) \ +({ \ + struct timespec tv; \ + clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &tv); \ + (var) = (uint64_t) (tv.tv_nsec + (uint64_t) 1000000000 * tv.tv_sec); \ +}) + +# define TIMING_DIFF(diff, start, end) (diff) = (end) - (start) +# define TIMING_ACCUM(sum, diff) (sum) += (diff) + +# define TIMING_PRINT_STATS(func, d_total_s, d_iters, d_total_i, max, min) \ + printf ("%s: ITERS:%g: TOTAL:%gs, MAX:%gns, MIN:%gns, %g iter/s\n", \ + (func), (d_total_i), (d_total_s) * 1e-9, (max) / (d_iters), \ + (min) / (d_iters), 1e9 * (d_total_i) / (d_total_s)) + +#endif |