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Linux/tools/perf/tests/workloads/brstack.c

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #include <stdlib.h>
  3 #include "../tests.h"
  4 
  5 #define BENCH_RUNS 999999
  6 
  7 static volatile int cnt;
  8 
  9 static void brstack_bar(void) {
 10 }                               /* return */
 11 
 12 static void brstack_foo(void) {
 13         brstack_bar();          /* call */
 14 }                               /* return */
 15 
 16 static void brstack_bench(void) {
 17         void (*brstack_foo_ind)(void) = brstack_foo;
 18 
 19         if ((cnt++) % 3)        /* branch (cond) */
 20                 brstack_foo();  /* call */
 21         brstack_bar();          /* call */
 22         brstack_foo_ind();      /* call (ind) */
 23 }
 24 
 25 static int brstack(int argc, const char **argv)
 26 {
 27         int num_loops = BENCH_RUNS;
 28 
 29         if (argc > 0)
 30                 num_loops = atoi(argv[0]);
 31 
 32         while (1) {
 33                 if ((cnt++) > num_loops)
 34                         break;
 35                 brstack_bench();/* call */
 36         }                       /* branch (uncond) */
 37         return 0;
 38 }
 39 
 40 DEFINE_WORKLOAD(brstack);
 41 

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