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/* $Id: PerformanceLinux.cpp 33992 2010-11-11 13:57:03Z vboxsync $ */
/** @file
*
* VBox Linux-specific Performance Classes implementation.
*/
/*
* Copyright (C) 2008 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include <stdio.h>
#include <iprt/alloc.h>
#include <iprt/err.h>
#include <iprt/param.h>
#include <iprt/string.h>
#include <map>
#include <vector>
#include "Logging.h"
#include "Performance.h"
namespace pm {
class CollectorLinux : public CollectorHAL
{
public:
virtual int preCollect(const CollectorHints& hints, uint64_t /* iTick */);
virtual int getHostMemoryUsage(ULONG *total, ULONG *used, ULONG *available);
virtual int getProcessMemoryUsage(RTPROCESS process, ULONG *used);
virtual int getRawHostCpuLoad(uint64_t *user, uint64_t *kernel, uint64_t *idle);
virtual int getRawProcessCpuLoad(RTPROCESS process, uint64_t *user, uint64_t *kernel, uint64_t *total);
private:
virtual int _getRawHostCpuLoad(uint64_t *user, uint64_t *kernel, uint64_t *idle);
int getRawProcessStats(RTPROCESS process, uint64_t *cpuUser, uint64_t *cpuKernel, ULONG *memPagesUsed);
struct VMProcessStats
{
uint64_t cpuUser;
uint64_t cpuKernel;
ULONG pagesUsed;
};
typedef std::map<RTPROCESS, VMProcessStats> VMProcessMap;
VMProcessMap mProcessStats;
uint64_t mUser, mKernel, mIdle;
};
CollectorHAL *createHAL()
{
return new CollectorLinux();
}
// Collector HAL for Linux
int CollectorLinux::preCollect(const CollectorHints& hints, uint64_t /* iTick */)
{
std::vector<RTPROCESS> processes;
hints.getProcesses(processes);
std::vector<RTPROCESS>::iterator it;
for (it = processes.begin(); it != processes.end(); it++)
{
VMProcessStats vmStats;
int rc = getRawProcessStats(*it, &vmStats.cpuUser, &vmStats.cpuKernel, &vmStats.pagesUsed);
if (RT_FAILURE(rc))
return rc;
mProcessStats[*it] = vmStats;
}
if (hints.isHostCpuLoadCollected() || mProcessStats.size())
{
_getRawHostCpuLoad(&mUser, &mKernel, &mIdle);
}
return VINF_SUCCESS;
}
int CollectorLinux::_getRawHostCpuLoad(uint64_t *user, uint64_t *kernel, uint64_t *idle)
{
int rc = VINF_SUCCESS;
ULONG u32user, u32nice, u32kernel, u32idle;
FILE *f = fopen("/proc/stat", "r");
if (f)
{
if (fscanf(f, "cpu %u %u %u %u", &u32user, &u32nice, &u32kernel, &u32idle) == 4)
{
*user = (uint64_t)u32user + u32nice;
*kernel = u32kernel;
*idle = u32idle;
}
else
rc = VERR_FILE_IO_ERROR;
fclose(f);
}
else
rc = VERR_ACCESS_DENIED;
return rc;
}
int CollectorLinux::getRawHostCpuLoad(uint64_t *user, uint64_t *kernel, uint64_t *idle)
{
*user = mUser;
*kernel = mKernel;
*idle = mIdle;
return VINF_SUCCESS;
}
int CollectorLinux::getRawProcessCpuLoad(RTPROCESS process, uint64_t *user, uint64_t *kernel, uint64_t *total)
{
VMProcessMap::const_iterator it = mProcessStats.find(process);
if (it == mProcessStats.end())
{
Log (("No stats pre-collected for process %x\n", process));
return VERR_INTERNAL_ERROR;
}
*user = it->second.cpuUser;
*kernel = it->second.cpuKernel;
*total = mUser + mKernel + mIdle;
return VINF_SUCCESS;
}
int CollectorLinux::getHostMemoryUsage(ULONG *total, ULONG *used, ULONG *available)
{
int rc = VINF_SUCCESS;
ULONG buffers, cached;
FILE *f = fopen("/proc/meminfo", "r");
if (f)
{
int processed = fscanf(f, "MemTotal: %u kB\n", total);
processed += fscanf(f, "MemFree: %u kB\n", available);
processed += fscanf(f, "Buffers: %u kB\n", &buffers);
processed += fscanf(f, "Cached: %u kB\n", &cached);
if (processed == 4)
{
*available += buffers + cached;
*used = *total - *available;
}
else
rc = VERR_FILE_IO_ERROR;
fclose(f);
}
else
rc = VERR_ACCESS_DENIED;
return rc;
}
int CollectorLinux::getProcessMemoryUsage(RTPROCESS process, ULONG *used)
{
VMProcessMap::const_iterator it = mProcessStats.find(process);
if (it == mProcessStats.end())
{
Log (("No stats pre-collected for process %x\n", process));
return VERR_INTERNAL_ERROR;
}
*used = it->second.pagesUsed * (PAGE_SIZE / 1024);
return VINF_SUCCESS;
}
int CollectorLinux::getRawProcessStats(RTPROCESS process, uint64_t *cpuUser, uint64_t *cpuKernel, ULONG *memPagesUsed)
{
int rc = VINF_SUCCESS;
char *pszName;
pid_t pid2;
char c;
int iTmp;
long long unsigned int u64Tmp;
unsigned uTmp;
unsigned long ulTmp;
signed long ilTmp;
ULONG u32user, u32kernel;
char buf[80]; /* @todo: this should be tied to max allowed proc name. */
RTStrAPrintf(&pszName, "/proc/%d/stat", process);
//printf("Opening %s...\n", pszName);
FILE *f = fopen(pszName, "r");
RTMemFree(pszName);
if (f)
{
if (fscanf(f, "%d %79s %c %d %d %d %d %d %u %lu %lu %lu %lu %u %u "
"%ld %ld %ld %ld %ld %ld %llu %lu %u",
&pid2, buf, &c, &iTmp, &iTmp, &iTmp, &iTmp, &iTmp, &uTmp,
&ulTmp, &ulTmp, &ulTmp, &ulTmp, &u32user, &u32kernel,
&ilTmp, &ilTmp, &ilTmp, &ilTmp, &ilTmp, &ilTmp, &u64Tmp,
&ulTmp, memPagesUsed) == 24)
{
Assert((pid_t)process == pid2);
*cpuUser = u32user;
*cpuKernel = u32kernel;
}
else
rc = VERR_FILE_IO_ERROR;
fclose(f);
}
else
rc = VERR_ACCESS_DENIED;
return rc;
}
}
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