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Diffstat (limited to 'lib/scryptenc/scryptenc_cpuperf.c')
| -rw-r--r-- | lib/scryptenc/scryptenc_cpuperf.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/lib/scryptenc/scryptenc_cpuperf.c b/lib/scryptenc/scryptenc_cpuperf.c deleted file mode 100644 index 27b7915..0000000 --- a/lib/scryptenc/scryptenc_cpuperf.c +++ /dev/null @@ -1,184 +0,0 @@ -/*- - * Copyright 2009 Colin Percival - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * This file was originally written by Colin Percival as part of the Tarsnap - * online backup system. - */ - -#include <sys/time.h> - -#include <stdint.h> -#include <stdio.h> -#include <time.h> - -#include "crypto_scrypt.h" - -#include "scryptenc_cpuperf.h" - -#ifdef HAVE_CLOCK_GETTIME - -static clock_t clocktouse; - -static int -getclockres(double * resd) -{ - struct timespec res; - - /* - * Try clocks in order of preference until we find one which works. - * (We assume that if clock_getres works, clock_gettime will, too.) - * The use of if/else/if/else/if/else rather than if/elif/elif/else - * is ugly but legal, and allows us to #ifdef things appropriately. - */ -#ifdef CLOCK_VIRTUAL - if (clock_getres(CLOCK_VIRTUAL, &res) == 0) - clocktouse = CLOCK_VIRTUAL; - else -#endif -#ifdef CLOCK_MONOTONIC - if (clock_getres(CLOCK_MONOTONIC, &res) == 0) - clocktouse = CLOCK_MONOTONIC; - else -#endif - if (clock_getres(CLOCK_REALTIME, &res) == 0) - clocktouse = CLOCK_REALTIME; - else - return (-1); - - /* Convert clock resolution to a double. */ - *resd = res.tv_sec + res.tv_nsec * 0.000000001; - - return (0); -} - -static int -getclocktime(struct timespec * ts) -{ - - if (clock_gettime(clocktouse, ts)) - return (-1); - - return (0); -} - -#else -static int -getclockres(double * resd) -{ - - *resd = 1.0 / CLOCKS_PER_SEC; - - return (0); -} - -static int -getclocktime(struct timespec * ts) -{ - struct timeval tv; - - if (gettimeofday(&tv, NULL)) - return (-1); - ts->tv_sec = tv.tv_sec; - ts->tv_nsec = tv.tv_usec * 1000; - - return (0); -} -#endif - -static int -getclockdiff(struct timespec * st, double * diffd) -{ - struct timespec en; - - if (getclocktime(&en)) - return (1); - *diffd = (en.tv_nsec - st->tv_nsec) * 0.000000001 + - (en.tv_sec - st->tv_sec); - - return (0); -} - -/** - * scryptenc_cpuperf(opps): - * Estimate the number of salsa20/8 cores which can be executed per second, - * and return the value via opps. - */ -int -scryptenc_cpuperf(double * opps) -{ - struct timespec st; - double resd, diffd; - uint64_t i = 0; - - /* Get the clock resolution. */ - if (getclockres(&resd)) - return (2); - -#ifdef DEBUG - fprintf(stderr, "Clock resolution is %f\n", resd); -#endif - - /* Loop until the clock ticks. */ - if (getclocktime(&st)) - return (2); - do { - /* Do an scrypt. */ - if (crypto_scrypt(NULL, 0, NULL, 0, 16, 1, 1, NULL, 0)) - return (3); - - /* Has the clock ticked? */ - if (getclockdiff(&st, &diffd)) - return (2); - if (diffd > 0) - break; - } while (1); - - /* Could how many scryps we can do before the next tick. */ - if (getclocktime(&st)) - return (2); - do { - /* Do an scrypt. */ - if (crypto_scrypt(NULL, 0, NULL, 0, 128, 1, 1, NULL, 0)) - return (3); - - /* We invoked the salsa20/8 core 512 times. */ - i += 512; - - /* Check if we have looped for long enough. */ - if (getclockdiff(&st, &diffd)) - return (2); - if (diffd > resd) - break; - } while (1); - -#ifdef DEBUG - fprintf(stderr, "%ju salsa20/8 cores performed in %f seconds\n", - (uintmax_t)i, diffd); -#endif - - /* We can do approximately i salsa20/8 cores per diffd seconds. */ - *opps = i / diffd; - return (0); -} |