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#include "stdafx.h"
#include "cpu_affinity.h"
#if defined(__FreeBSD__) && (__FreeBSD__ >= 7)
#include <sys/param.h>
#include <sys/cpuset.h>
#elif defined(_linux_)
#include <pthread.h>
#include <util/stream/file.h>
#include <util/string/printf.h>
#endif
namespace NNetliba {
class TCPUSet {
public:
enum { MAX_SIZE = 128 };
private:
#if defined(__FreeBSD__) && (__FreeBSD__ >= 7)
#define NUMCPU ((CPU_MAXSIZE > MAX_SIZE) ? 1 : (MAX_SIZE / CPU_MAXSIZE))
cpuset_t CpuInfo[NUMCPU];
public:
bool GetAffinity() {
int error = cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(CpuInfo), CpuInfo);
return error == 0;
}
bool SetAffinity() {
int error = cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(CpuInfo), CpuInfo);
return error == 0;
}
bool IsSet(size_t i) {
return CPU_ISSET(i, CpuInfo);
}
void Set(size_t i) {
CPU_SET(i, CpuInfo);
}
#elif defined(_linux_)
public:
#define NUMCPU ((CPU_SETSIZE > MAX_SIZE) ? 1 : (MAX_SIZE / CPU_SETSIZE))
cpu_set_t CpuInfo[NUMCPU];
public:
bool GetAffinity() {
int error = pthread_getaffinity_np(pthread_self(), sizeof(CpuInfo), CpuInfo);
return error == 0;
}
bool SetAffinity() {
int error = pthread_setaffinity_np(pthread_self(), sizeof(CpuInfo), CpuInfo);
return error == 0;
}
bool IsSet(size_t i) {
return CPU_ISSET(i, CpuInfo);
}
void Set(size_t i) {
CPU_SET(i, CpuInfo);
}
#else
public:
bool GetAffinity() {
return true;
}
bool SetAffinity() {
return true;
}
bool IsSet(size_t i) {
Y_UNUSED(i);
return true;
}
void Set(size_t i) {
Y_UNUSED(i);
}
#endif
TCPUSet() {
Clear();
}
void Clear() {
memset(this, 0, sizeof(*this));
}
};
static TMutex CPUSetsLock;
struct TCPUSetInfo {
TCPUSet CPUSet;
bool IsOk;
TCPUSetInfo()
: IsOk(false)
{
}
};
static THashMap<int, TCPUSetInfo> CPUSets;
void BindToSocket(int n) {
TGuard<TMutex> gg(CPUSetsLock);
if (CPUSets.find(n) == CPUSets.end()) {
TCPUSetInfo& res = CPUSets[n];
bool foundCPU = false;
#ifdef _linux_
for (int cpuId = 0; cpuId < TCPUSet::MAX_SIZE; ++cpuId) {
try { // I just wanna check if file exists, I don't want your stinking exceptions :/
TIFStream f(Sprintf("/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpuId).c_str());
TString s;
if (f.ReadLine(s) && !s.empty()) {
//printf("cpu%d - %s\n", cpuId, s.c_str());
int physCPU = atoi(s.c_str());
if (physCPU == 0) {
res.IsOk = true;
res.CPUSet.Set(cpuId);
foundCPU = true;
}
} else {
break;
}
} catch (const TFileError&) {
break;
}
}
#endif
if (!foundCPU && n == 0) {
for (int i = 0; i < 6; ++i) {
res.CPUSet.Set(i);
}
res.IsOk = true;
foundCPU = true;
}
}
{
TCPUSetInfo& cc = CPUSets[n];
if (cc.IsOk) {
cc.CPUSet.SetAffinity();
}
}
}
}
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