ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-astnew-ast-unique-exprpthread-emulationqualifiedEnum
Last change
on this file since 72828a8 was
525b5ef,
checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
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add documentation
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Property mode set to
100644
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File size:
571 bytes
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1 | #include <stdio.h> |
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2 | |
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3 | #include "bench.h" |
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4 | |
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5 | // Does a "lock add" on entry and a "lock sub" on exit => 2 atomic instructions making it the most expensive |
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6 | // atomic test. |
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7 | |
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8 | volatile int value; |
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9 | |
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10 | void __attribute__((noinline)) do_call() { |
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11 | __atomic_add_fetch( &value, 1, __ATOMIC_SEQ_CST ); |
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12 | asm volatile (""); |
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13 | __atomic_sub_fetch( &value, 1, __ATOMIC_SEQ_CST ); |
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14 | } |
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15 | |
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16 | int main( int argc, char * argv[] ) { |
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17 | BENCH_START() |
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18 | BENCH( |
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19 | for (size_t i = 0; i < times; i++) { |
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20 | do_call(); |
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21 | }, |
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22 | result |
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23 | ) |
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24 | printf( "%g\n", result ); |
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25 | } |
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26 | |
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27 | // Local Variables: // |
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28 | // tab-width: 4 // |
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29 | // End: // |
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