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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <stdlib.h>
#include "depfile_parser.h"
#include "util.h"
#include "metrics.h"
int main(int argc, char* argv[]) {
if (argc < 2) {
printf("usage: %s <file1> <file2...>\n", argv[0]);
return 1;
}
vector<float> times;
for (int i = 1; i < argc; ++i) {
const char* filename = argv[i];
for (int limit = 1 << 10; limit < (1<<20); limit *= 2) {
int64_t start = GetTimeMillis();
for (int rep = 0; rep < limit; ++rep) {
string buf;
string err;
if (ReadFile(filename, &buf, &err) < 0) {
printf("%s: %s\n", filename, err.c_str());
return 1;
}
DepfileParser parser;
if (!parser.Parse(&buf, &err)) {
printf("%s: %s\n", filename, err.c_str());
return 1;
}
}
int64_t end = GetTimeMillis();
if (end - start > 100) {
int delta = (int)(end - start);
float time = delta*1000 / (float)limit;
printf("%s: %.1fus\n", filename, time);
times.push_back(time);
break;
}
}
}
if (!times.empty()) {
float min = times[0];
float max = times[0];
float total = 0;
for (size_t i = 0; i < times.size(); ++i) {
total += times[i];
if (times[i] < min)
min = times[i];
else if (times[i] > max)
max = times[i];
}
printf("min %.1fus max %.1fus avg %.1fus\n",
min, max, total / times.size());
}
return 0;
}
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