Upgrade gperftools to 2.9 for GCP/GMC/GMP/GMD. (#2247)

trunk/3rdparty/gperftools-2-fit/benchmark/run_benchmark.c

@@ -0,0 +1,112 @@
+// -*- Mode: C; c-basic-offset: 2; indent-tabs-mode: nil -*-
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "run_benchmark.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+
+struct internal_bench {
+  bench_body body;
+  uintptr_t param;
+};
+
+static void run_body(struct internal_bench *b, long iterations)
+{
+  b->body(iterations, b->param);
+}
+
+static double measure_once(struct internal_bench *b, long iterations)
+{
+  struct timeval tv_before, tv_after;
+  int rv;
+  double time;
+
+  rv = gettimeofday(&tv_before, NULL);
+  if (rv) {
+    perror("gettimeofday");
+    abort();
+  }
+
+  run_body(b, iterations);
+
+  rv = gettimeofday(&tv_after, NULL);
+  if (rv) {
+    perror("gettimeofday");
+    abort();
+  }
+  tv_after.tv_sec -= tv_before.tv_sec;
+  time = tv_after.tv_sec * 1E6 + tv_after.tv_usec;
+  time -= tv_before.tv_usec;
+  time *= 1000;
+  return time;
+}
+
+#define TRIAL_NSEC 0.3E9
+#define TARGET_NSEC 3E9
+
+static double run_benchmark(struct internal_bench *b)
+{
+  long iterations = 128;
+  double nsec;
+  while (1) {
+    nsec = measure_once(b, iterations);
+    if (nsec > TRIAL_NSEC) {
+      break;
+    }
+    iterations <<= 1;
+  }
+  while (nsec < TARGET_NSEC) {
+    iterations = (long)(iterations * TARGET_NSEC * 1.1 / nsec);
+    nsec = measure_once(b, iterations);
+  }
+  return nsec / iterations;
+}
+
+void report_benchmark(const char *name, bench_body body, uintptr_t param)
+{
+  int i;
+  struct internal_bench b = {.body = body, .param = param};
+  for (i = 0; i < 3; i++) {
+    double nsec = run_benchmark(&b);
+    int slen;
+    int padding_size;
+
+    slen = printf("Benchmark: %s", name);
+    if (param && name[strlen(name)-1] != ')') {
+      slen += printf("(%lld)", (long long)param);
+    }
+    padding_size = 60 - slen;
+    if (padding_size < 1) {
+      padding_size = 1;
+    }
+    printf("%*c%f nsec\n", padding_size, ' ', nsec);
+    fflush(stdout);
+  }
+}