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