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74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/** Unit tests for rdtsc
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*
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* @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
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* @copyright 2018, Institute for Automation of Complex Power Systems, EONERC
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* @license GNU General Public License (version 3)
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*
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* VILLASnode
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************************/
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#include <criterion/criterion.h>
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#include <villas/utils.h>
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#include <villas/tsc.h>
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#include <villas/timing.h>
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#define CNT (1 << 18)
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Test(tsc, increasing)
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{
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int ret;
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struct tsc tsc;
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uint64_t *cntrs;
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ret = tsc_init(&tsc);
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cr_assert_eq(ret, 0);
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cntrs = alloc(sizeof(uint64_t) * CNT);
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cr_assert_not_null(cntrs);
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for (int i = 0; i < CNT; i++)
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cntrs[i] = tsc_now(&tsc);
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for (int i = 1; i < CNT; i++)
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cr_assert_lt(cntrs[i-1], cntrs[i]);
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free(cntrs);
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}
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Test(tsc, sleep)
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{
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int ret;
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double delta, duration = 1;
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struct timespec start, stop;
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struct tsc tsc;
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uint64_t start_cycles, end_cycles;
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ret = tsc_init(&tsc);
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cr_assert_eq(ret, 0);
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clock_gettime(CLOCK_MONOTONIC, &start);
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start_cycles = tsc_now(&tsc);
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end_cycles = start_cycles + duration * tsc.frequency;
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while (tsc_now(&tsc) < end_cycles);
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clock_gettime(CLOCK_MONOTONIC, &stop);
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delta = time_delta(&start, &stop);
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cr_assert_float_eq(delta, duration, 1e-4, "Error: %f, Delta: %lf, Freq: %llu", delta - duration, delta, tsc.frequency);
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}
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