Ninja
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00001 // Copyright 2011 Google Inc. All Rights Reserved. 00002 // 00003 // Licensed under the Apache License, Version 2.0 (the "License"); 00004 // you may not use this file except in compliance with the License. 00005 // You may obtain a copy of the License at 00006 // 00007 // http://www.apache.org/licenses/LICENSE-2.0 00008 // 00009 // Unless required by applicable law or agreed to in writing, software 00010 // distributed under the License is distributed on an "AS IS" BASIS, 00011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00012 // See the License for the specific language governing permissions and 00013 // limitations under the License. 00014 00015 #include <stdio.h> 00016 #include <stdlib.h> 00017 00018 #include "depfile_parser.h" 00019 #include "util.h" 00020 #include "metrics.h" 00021 00022 int main(int argc, char* argv[]) { 00023 if (argc < 2) { 00024 printf("usage: %s <file1> <file2...>\n", argv[0]); 00025 return 1; 00026 } 00027 00028 vector<float> times; 00029 for (int i = 1; i < argc; ++i) { 00030 const char* filename = argv[i]; 00031 00032 for (int limit = 1 << 10; limit < (1<<20); limit *= 2) { 00033 int64_t start = GetTimeMillis(); 00034 for (int rep = 0; rep < limit; ++rep) { 00035 string buf; 00036 string err; 00037 if (ReadFile(filename, &buf, &err) < 0) { 00038 printf("%s: %s\n", filename, err.c_str()); 00039 return 1; 00040 } 00041 00042 DepfileParser parser; 00043 if (!parser.Parse(&buf, &err)) { 00044 printf("%s: %s\n", filename, err.c_str()); 00045 return 1; 00046 } 00047 } 00048 int64_t end = GetTimeMillis(); 00049 00050 if (end - start > 100) { 00051 int delta = (int)(end - start); 00052 float time = delta*1000 / (float)limit; 00053 printf("%s: %.1fus\n", filename, time); 00054 times.push_back(time); 00055 break; 00056 } 00057 } 00058 } 00059 00060 if (!times.empty()) { 00061 float min = times[0]; 00062 float max = times[0]; 00063 float total = 0; 00064 for (size_t i = 0; i < times.size(); ++i) { 00065 total += times[i]; 00066 if (times[i] < min) 00067 min = times[i]; 00068 else if (times[i] > max) 00069 max = times[i]; 00070 } 00071 00072 printf("min %.1fus max %.1fus avg %.1fus\n", 00073 min, max, total / times.size()); 00074 } 00075 00076 return 0; 00077 }