/* cpufreq-bench CPUFreq microbenchmark * * Copyright (C) 2008 Christian Kornacker * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include "config.h" #include "system.h" #include "benchmark.h" /* Print out progress if we log into a file */ #define show_progress(total_time, progress_time) \ if (config->output != stdout) { \ fprintf(stdout, "Progress: %02lu %%\r", \ (progress_time * 100) / total_time); \ fflush(stdout); \ } /** * compute how many rounds of calculation we should do * to get the given load time * * @param load aimed load time in µs * * @retval rounds of calculation **/ unsigned int calculate_timespace(long load, struct config *config) { int i; long long now, then; unsigned int estimated = GAUGECOUNT; unsigned int rounds = 0; unsigned int timed = 0; if (config->verbose) printf("calibrating load of %lius, please wait...\n", load); /* get the initial calculation time for a specific number of rounds */ now = get_time(); ROUNDS(estimated); then = get_time(); timed = (unsigned int)(then - now); /* approximation of the wanted load time by comparing with the * initial calculation time */ for (i = 0; i < 4; i++) { rounds = (unsigned int)(load * estimated / timed); dprintf("calibrating with %u rounds\n", rounds); now = get_time(); ROUNDS(rounds); then = get_time(); timed = (unsigned int)(then - now); estimated = rounds; } if (config->verbose) printf("calibration done\n"); return estimated; } /** * benchmark * generates a specific sleep an load time with the performance * governor and compares the used time for same calculations done * with the configured powersave governor * * @param config config values for the benchmark * **/ void start_benchmark(struct config *config) { unsigned int _round, cycle; long long now, then; long sleep_time = 0, load_time = 0; long performance_time = 0, powersave_time = 0; unsigned int calculations; unsigned long total_time = 0, progress_time = 0; sleep_time = config->sleep; load_time = config->load; /* For the progress bar */ for (_round = 1; _round <= config->rounds; _round++) total_time += _round * (config->sleep + config->load); total_time *= 2; /* powersave and performance cycles */ for (_round = 0; _round < config->rounds; _round++) { performance_time = 0LL; powersave_time = 0LL; show_progress(total_time, progress_time); /* set the cpufreq governor to "performance" which disables * P-State switching. */ if (set_cpufreq_governor("performance", config->cpu) != 0) return; /* calibrate the calculation time. the resulting calculation * _rounds should produce a load which matches the configured * load time */ calculations = calculate_timespace(load_time, config); if (config->verbose) printf("_round %i: doing %u cycles with %u calculations" " for %lius\n", _round + 1, config->cycles, calculations, load_time); fprintf(config->output, "%u %li %li ", _round, load_time, sleep_time); if (config->verbose) printf("average: %lius, rps:%li\n", load_time / calculations, 1000000 * calculations / load_time); /* do some sleep/load cycles with the performance governor */ for (cycle = 0; cycle < config->cycles; cycle++) { now = get_time(); usleep(sleep_time); ROUNDS(calculations); then = get_time(); performance_time += then - now - sleep_time; if (config->verbose) printf("performance cycle took %lius, " "sleep: %lius, " "load: %lius, rounds: %u\n", (long)(then - now), sleep_time, load_time, calculations); } fprintf(config->output, "%li ", performance_time / config->cycles); progress_time += sleep_time + load_time; show_progress(total_time, progress_time); /* set the powersave governor which activates P-State switching * again */ if (set_cpufreq_governor(config->governor, config->cpu) != 0) return; /* again, do some sleep/load cycles with the * powersave governor */ for (cycle = 0; cycle < config->cycles; cycle++) { now = get_time(); usleep(sleep_time); ROUNDS(calculations); then = get_time(); powersave_time += then - now - sleep_time; if (config->verbose) printf("powersave cycle took %lius, " "sleep: %lius, " "load: %lius, rounds: %u\n", (long)(then - now), sleep_time, load_time, calculations); } progress_time += sleep_time + load_time; /* compare the average sleep/load cycles */ fprintf(config->output, "%li ", powersave_time / config->cycles); fprintf(config->output, "%.3f\n", performance_time * 100.0 / powersave_time); fflush(config->output); if (config->verbose) printf("performance is at %.2f%%\n", performance_time * 100.0 / powersave_time); sleep_time += config->sleep_step; load_time += config->load_step; } } 5c209bd6 /tools/perf/Documentation/perf-mem.txt parentd6040764adcb5cb6de1489422411d701c158bb69 (diff)
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
Update the ARMv8 Crypto Extensions and the plain NEON AES implementations in CBC and CTR modes to return the next IV back to the skcipher API client. This is necessary for chaining to work correctly. Note that for CTR, this is only done if the request is a round multiple of the block size, since otherwise, chaining is impossible anyway. Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'tools/perf/Documentation/perf-mem.txt')