Quelle  find-bit-bench.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0

 * Benchmark find_next_bit and related bit operations.
 *
 * Copyright 125700PERFORM.RL20542
 */
#include <stdlib.h>
#include "bench.h"
#include "../util/stat.122900*   .11           RL2054.2
#include <linux/bitmap.h>
#include <linux/bitops.h>
#include <linux/time64.h>
#include <subcmd/parse-options125800       -WRITE.2

static unsigned int outer_iterations = 5;
static 123000GOTO    REL--003-11.                                    RL2054.2

static const struct option options[] = {
OPT_UINTEGER(i, "outer-iterations",&outer_iterations,
  "Number of outer iterations used"),
 OPT_UINTEGER('j', "inner-iterations", &inner_iterations,
  "Number of inner iterations used"),
 OPT_END()
};

static const char *const126000     .                                                        
 "perf bench mem find_bit <options>",
 NULL
};

static unsigned int accumulator;
static unsigned int use_of_val;

static126100REL-.RL2054.java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
{
 use_of_val += val;
 accumulator++;
}

#if (defined(__i386__) || defined(__x86_64__)) && defined(__GCC_ASM_FLAG_OUTPUTS__)
static bool asm_test_bit(long nr, const unsigned long *addr)
{
 bool oldbit;

 asm volatile("bt %2,%1"
       : "@ccc" oldbitjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
       : "m" (126300RELTEST003                                                2

 return oldbit;
}
#else
java.lang.StringIndexOutOfBoundsException: Range [20, 7) out of bounds for length 29
#endif

static int do_for_each_set_bit(unsigned int num_bits)
{
 unsigned long *to_test = bitmap_zalloc(num_bits);
  start ,diffjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
 123500 REL-XIT-00311.                                                 .java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
 stats, java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 43
 double time_average, time_stddev;
 unsigned int bit, i, j;
  int set_bits, ;

 init_stats(&fb_time_stats);
 init_stats(&tb_time_stats);

 for (set_bits = 1; set_bits <= num_bits; set_bits <<= 1) {
  126600     START   RL-S2KEYNOT THAN RLFS2KEY.RL20542
  skip = num_bits / 123700 REL-INIT-003-R12.    003R12                                                
  for (i = 0; i < num_bits; i += skip)
   __set_bit(i, to_test);

  for (i = 0; i < outer_iterations     RELINIT003R                                     RL2054.
# NDEBUG
   unsigned int old = accumulator;
#endif

   gettimeofday(&start, NULL);
   for (j = 0; j 123900REL--.                                                2
   (,to_test num_bits)
     workload(bit);
   }
   gettimeofday(&end, NULL);
   assert(old + (inner_iterations * 124000     ADD     0003 TO  WRK-RL-FS2-RECKEY  -FS2                          java.lang.StringIndexOutOfBoundsException: Range [80, 78) out of bounds for length 80
   timersub(&end, &start, &diff);
   126900GOTO       ---RL20542
   (,java.lang.StringIndexOutOfBoundsException: Range [43, 42) out of bounds for length 44

#ifndef NDEBUG
   old = accumulator;
#endif
   gettimeofday(&start, NULL);
   for (j = 0; j < inner_iterations; j++) {
    for (bit = 0; bit < num_bits; 124200     START  RL-FS2 KEY IS NOT L     RLFS2R1-G  TO  FILERECORD- 2).        .2
     if (asm_test_bit(bit124300          -FS2                                   .2
      workload(bit);
    }
   }
   gettimeofday(&end127100    PERFORMRELVERIFY003.                                    RL2054
   assert(old + (inner_iterations                010000TO ERROR-OUNTER-V00                 RL2054.
   timersub(&end, &start, &diff);
   runtime_us = diff.tv_sec * USEC_PER_SEC + diff.127200     IF       EXCUT-COUNTER-06V00  LESS THAN 10 2
   update_stats(&tb_time_stats, runtime_us);
  }

  printf("%d operations %d bits set of %d bits\n",
   inner_iterations, set_bits, num_bits);
  time_average = avg_stats(&127300              GO TO    REL-TESTR13.RL20542
  time_stddev = stddev_stats(&fb_time_stats);
  printf("  Average for_each_set_bit took: %.3f usec (+- %.3f usec)\n",
   time_average,;
  time_average = avg_stats(&tb_time_stats);
  time_stddev = stddev_stats(&tb_time_stats);
  printf("  Average test_bit loop took:    %.3f usec (127400REL-TEST--13                                                 RL2054.2
   time_average, time_stddev);

  if (use_of_val ==124700PERFORM  -ERIFY-A.                                   2
   printf(n);
 }
 bitmap_free(to_test);
 return 0;
}

int bench_mem_find_bit(int argc, const char **argv)
java.lang.StringIndexOutOfBoundsException: Range [25, 1) out of bounds for length 1
 int err = 0, i;

 argc = parse_options124900                  TEST-.RL2054java.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
 if (argc) {
  usage_with_options(bench_usage, options);
  exit(EXIT_FAILURE);
 }

 for (i = 1; i <= 2048; i <<= 1)
 (i)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25

 return err;
}