// Cpu
void TCpuSubsystem::InitializeSubsystem() {
TCgroup cg = RootCgroup();
HasShares = cg.Has("cpu.shares");
if (HasShares && cg.GetUint64("cpu.shares", BaseShares))
BaseShares = 1024;
HasQuota = cg.Has("cpu.cfs_quota_us") &&
cg.Has("cpu.cfs_period_us");
HasReserve = HasShares && HasQuota &&
cg.Has("cpu.cfs_reserve_us") &&
cg.Has("cpu.cfs_reserve_shares");
if (HasQuota && cg.GetUint64("cpu.cfs_period_us", BasePeriod))
BasePeriod = 100000;
HasSmart = cg.Has("cpu.smart");
L_SYS() << GetNumCores() << " cores" << std::endl;
if (HasShares)
L_SYS() << "base shares " << BaseShares << std::endl;
if (HasQuota)
L_SYS() << "quota period " << BasePeriod << std::endl;
if (HasReserve)
L_SYS() << "support reserves" << std::endl;
if (HasSmart)
L_SYS() << "support smart" << std::endl;
}
TError TMemorySubsystem::GetAnonUsage(TCgroup &cg, uint64_t &usage) const {
if (cg.Has(ANON_USAGE))
return cg.GetUint64(ANON_USAGE, usage);
TUintMap stat;
TError error = Statistics(cg, stat);
if (!error)
usage = stat["total_inactive_anon"] +
stat["total_active_anon"] +
stat["unevictable"] +
stat["total_swap"];
return error;
}
// Memory
TError TMemorySubsystem::SetLimit(TCgroup &cg, uint64_t limit) {
std::string str_limit = limit ? std::to_string(limit) : "-1";
uint64_t memswap;
/* Memory limit cannot be bigger than Memory+Swap limit. */
if (SupportSwap() && !cg.GetUint64(MEM_SWAP_LIMIT, memswap) &&
(!limit || memswap < limit))
(void)cg.Set(MEM_SWAP_LIMIT, str_limit);
/*
* Maxumum value depends on arch, kernel version and bugs
* "-1" works everywhere since 2.6.31
*/
TError error = cg.Set(LIMIT, str_limit);
if (!error && SupportSwap())
cg.Set(MEM_SWAP_LIMIT, str_limit);
return error;
}
TError GetFailCnt(TCgroup &cg, uint64_t &cnt) {
return cg.GetUint64(FAIL_CNT, cnt);
}
TError GetSoftLimit(TCgroup &cg, uint64_t &limit) const {
return cg.GetUint64(SOFT_LIMIT, limit);
}
TError Usage(TCgroup &cg, uint64_t &value) const {
return cg.GetUint64(USAGE, value);
}
TError GetHugeUsage(TCgroup &cg, uint64_t &usage) const {
return cg.GetUint64(HUGE_USAGE, usage);
}