These scripts are made to parse TCMalloc output in order to extract certain info from them.
In particular, these scripts rely on the error logging system for ChromeOS in order to extract information. In order to use a script (e.g. total_mem.py), you just have the command:
./total_mem.py FILENAME
where FILENAME is the name of the log file to be parsed.
There are two ideas that motivate these changes:
The following files have to be changed:
in chrome/browser/metrics/perf_provider_chrome_os, add:
#include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
Change the perf profiling interval to something small (60*1000 milliseconds).
Inside DoPeriodicCollection, insert the following code:
std::string output;
char* chr_arr = new char[9999];
MallocExtension::instance() ->GetHeapSample(&output);
MallocExtension::instance() ->GetStats(chr_arr, 9999);
LOG(ERROR) << "Output Heap Data: ";
LOG(ERROR) << output;
LOG(ERROR) << "Output Heap Stats: ";
output = "";
for (unsigned int i = 0; i < strlen(chr_arr); i++) {
output += chr_arr[i];
}
LOG(ERROR) << output;
delete[] chr_arr;