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stress-atomic.c
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stress-atomic.c
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/*
* Copyright (C) 2013-2017 Canonical, Ltd.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* This code is a complete clean re-write of the stress tool by
* Colin Ian King <[email protected]> and attempts to be
* backwardly compatible with the stress tool by Amos Waterland
* <[email protected]> but has more stress tests and more
* functionality.
*
*/
#include "stress-ng.h"
#define DO_ATOMIC_OPS(type, var) \
{ \
type tmp = mwc64(); \
\
__atomic_store(var, &tmp, __ATOMIC_RELAXED); \
__atomic_load(var, &tmp, __ATOMIC_RELAXED); \
__atomic_load(var, &tmp, __ATOMIC_ACQUIRE); \
__atomic_add_fetch(var, 1, __ATOMIC_RELAXED); \
__atomic_add_fetch(var, 2, __ATOMIC_ACQUIRE); \
__atomic_sub_fetch(var, 3, __ATOMIC_RELAXED); \
__atomic_sub_fetch(var, 4, __ATOMIC_ACQUIRE); \
__atomic_and_fetch(var, ~1, __ATOMIC_RELAXED); \
__atomic_and_fetch(var, ~2, __ATOMIC_ACQUIRE); \
__atomic_xor_fetch(var, ~4, __ATOMIC_RELAXED); \
__atomic_xor_fetch(var, ~8, __ATOMIC_ACQUIRE); \
__atomic_or_fetch(var, 16, __ATOMIC_RELAXED); \
__atomic_or_fetch(var, 32, __ATOMIC_ACQUIRE); \
__atomic_nand_fetch(var, 64, __ATOMIC_RELAXED); \
__atomic_nand_fetch(var, 128, __ATOMIC_ACQUIRE);\
__atomic_clear(var, __ATOMIC_RELAXED); \
\
__atomic_store(var, &tmp, __ATOMIC_RELAXED); \
__atomic_fetch_add(var, 1, __ATOMIC_RELAXED); \
__atomic_fetch_add(var, 2, __ATOMIC_ACQUIRE); \
__atomic_fetch_sub(var, 3, __ATOMIC_RELAXED); \
__atomic_fetch_sub(var, 4, __ATOMIC_ACQUIRE); \
__atomic_fetch_and(var, ~1, __ATOMIC_RELAXED); \
__atomic_fetch_and(var, ~2, __ATOMIC_ACQUIRE); \
__atomic_fetch_xor(var, ~4, __ATOMIC_RELAXED); \
__atomic_fetch_xor(var, ~8, __ATOMIC_ACQUIRE); \
__atomic_fetch_or(var, 16, __ATOMIC_RELAXED); \
__atomic_fetch_or(var, 32, __ATOMIC_ACQUIRE); \
__atomic_fetch_nand(var, 64, __ATOMIC_RELAXED); \
__atomic_fetch_nand(var, 128, __ATOMIC_ACQUIRE);\
__atomic_clear(var, __ATOMIC_RELAXED); \
\
__atomic_store(var, &tmp, __ATOMIC_RELAXED); \
__atomic_load(var, &tmp, __ATOMIC_RELAXED); \
__atomic_add_fetch(var, 1, __ATOMIC_RELAXED); \
__atomic_sub_fetch(var, 3, __ATOMIC_RELAXED); \
__atomic_and_fetch(var, ~1, __ATOMIC_RELAXED); \
__atomic_xor_fetch(var, ~4, __ATOMIC_RELAXED); \
__atomic_or_fetch(var, 16, __ATOMIC_RELAXED); \
__atomic_nand_fetch(var, 64, __ATOMIC_RELAXED); \
__atomic_load(var, &tmp, __ATOMIC_ACQUIRE); \
__atomic_add_fetch(var, 2, __ATOMIC_ACQUIRE); \
__atomic_sub_fetch(var, 4, __ATOMIC_ACQUIRE); \
__atomic_and_fetch(var, ~2, __ATOMIC_ACQUIRE); \
__atomic_xor_fetch(var, ~8, __ATOMIC_ACQUIRE); \
__atomic_or_fetch(var, 32, __ATOMIC_ACQUIRE); \
__atomic_nand_fetch(var, 128, __ATOMIC_ACQUIRE);\
__atomic_clear(var, __ATOMIC_RELAXED); \
\
__atomic_store(var, &tmp, __ATOMIC_RELAXED); \
__atomic_fetch_add(var, 1, __ATOMIC_RELAXED); \
__atomic_fetch_sub(var, 3, __ATOMIC_RELAXED); \
__atomic_fetch_and(var, ~1, __ATOMIC_RELAXED); \
__atomic_fetch_xor(var, ~4, __ATOMIC_RELAXED); \
__atomic_fetch_or(var, 16, __ATOMIC_RELAXED); \
__atomic_fetch_nand(var, 64, __ATOMIC_RELAXED); \
__atomic_fetch_add(var, 2, __ATOMIC_ACQUIRE); \
__atomic_fetch_sub(var, 4, __ATOMIC_ACQUIRE); \
__atomic_fetch_and(var, ~2, __ATOMIC_ACQUIRE); \
__atomic_fetch_xor(var, ~8, __ATOMIC_ACQUIRE); \
__atomic_fetch_or(var, 32, __ATOMIC_ACQUIRE); \
__atomic_fetch_nand(var, 128, __ATOMIC_ACQUIRE);\
__atomic_clear(var, __ATOMIC_RELAXED); \
}
#if defined(TEST_ATOMIC_BUILD)
uint64_t mwc64(void)
{
static uint64_t v = 0xdeadbeef;
v = (v >> 1) ^ (v << 63);
return v;
}
int main(void)
{
uint64_t val64;
uint32_t val32;
uint16_t val16;
uint8_t val8;
DO_ATOMIC_OPS(uint64_t, &val64);
DO_ATOMIC_OPS(uint32_t, &val32);
DO_ATOMIC_OPS(uint16_t, &val16);
DO_ATOMIC_OPS(uint8_t, &val8);
return 0;
}
#else
#if defined(HAVE_ATOMIC)
/*
* stress_atomic()
* stress gcc atomic memory ops
*/
int stress_atomic(const args_t *args)
{
do {
DO_ATOMIC_OPS(uint64_t, &g_shared->atomic.val64);
DO_ATOMIC_OPS(uint32_t, &g_shared->atomic.val32);
DO_ATOMIC_OPS(uint16_t, &g_shared->atomic.val16);
DO_ATOMIC_OPS(uint8_t, &g_shared->atomic.val8);
inc_counter(args);
} while (keep_stressing());
return EXIT_SUCCESS;
}
#else
int stress_atomic(const args_t *args)
{
return stress_not_implemented(args);
}
#endif
#endif