Last change
on this file since ba068c0 was
26fd986,
checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
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update benchmarks for concurrency paper
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-
Property mode set to
100644
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File size:
1.0 KB
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1 | #include <pthread.h> |
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2 | #include <stdio.h> |
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3 | |
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4 | #include "bench.h" |
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5 | |
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6 | volatile int go = 0; |
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7 | |
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8 | pthread_mutex_t m; |
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9 | pthread_cond_t c; |
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10 | |
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11 | void __attribute__((noinline)) call() { |
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12 | pthread_mutex_lock( &m ); |
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13 | pthread_cond_signal( &c ); |
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14 | pthread_mutex_unlock( &m ); |
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15 | } |
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16 | |
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17 | void __attribute__((noinline)) wait() { |
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18 | pthread_mutex_lock(&m); |
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19 | go = 1; |
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20 | for ( size_t i = 0; i < times; i++ ) { |
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21 | pthread_cond_wait( &c, &m ); |
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22 | } |
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23 | go = 0; |
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24 | pthread_mutex_unlock( &m ); |
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25 | } |
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26 | |
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27 | void * thread_main( __attribute__((unused)) void * arg ) { |
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28 | while ( go == 0 ) { sched_yield(); } // waiter must start first |
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29 | // barging for lock acquire => may not execute N times |
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30 | BENCH( |
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31 | while ( go == 1 ) { call(); }, |
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32 | result |
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33 | ) |
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34 | printf( "%g\n", result ); |
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35 | return NULL; |
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36 | } |
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37 | |
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38 | int main( int argc, char * argv[] ) { |
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39 | BENCH_START() |
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40 | pthread_t thread; |
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41 | if ( pthread_create( &thread, NULL, thread_main, NULL ) < 0 ) { |
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42 | perror( "failure" ); |
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43 | return 1; |
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44 | } |
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45 | wait(); |
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46 | if ( pthread_join( thread, NULL ) < 0 ) { |
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47 | perror( "failure" ); |
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48 | return 1; |
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49 | } |
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50 | } |
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51 | |
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52 | // Local Variables: // |
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53 | // tab-width: 4 // |
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54 | // End: // |
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