TError TMemorySubsystem::SetupOOMEvent(TCgroup &cg, TFile &event) {
TError error;
TFile knob;
error = knob.OpenRead(cg.Knob(OOM_CONTROL));
if (error)
return error;
event.Close();
event.SetFd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
if (event.Fd < 0)
return TError(EError::Unknown, errno, "Cannot create eventfd");
error = cg.Set(EVENT_CONTROL, std::to_string(event.Fd) + " " + std::to_string(knob.Fd));
if (error)
event.Close();
return error;
}
TError TBlkioSubsystem::Statistics(TCgroup &cg,
const std::string &file,
std::vector<BlkioStat> &stat) const {
std::vector<std::string> lines;
TError error = cg.Knob(file).ReadLines(lines);
if (error)
return error;
BlkioStat s;
for (size_t i = 0; i < lines.size(); i += 5) {
std::vector<std::string> tokens;
error = SplitString(lines[i], ' ', tokens);
if (error)
return error;
if (tokens.size() == 3) {
error = GetDevice(tokens[0], s.Device);
if (error)
return error;
} else {
continue; /* Total */
}
error = GetStatLine(lines, i + 0, "Read", s.Read);
if (error)
return error;
error = GetStatLine(lines, i + 1, "Write", s.Write);
if (error)
return error;
error = GetStatLine(lines, i + 2, "Sync", s.Sync);
if (error)
return error;
error = GetStatLine(lines, i + 3, "Async", s.Async);
if (error)
return error;
stat.push_back(s);
}
return TError::Success();
}