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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "hw_info.h"
#include <vespa/vespalib/stllike/string.h>
#include <chrono>
namespace proton {
/*
* Class detecting some hardware characteristics on the machine, e.g.
* speed of sequential write to file.
*/
class HwInfoSampler
{
public:
struct Config {
uint64_t diskSizeBytes;
double diskWriteSpeedOverride;
double slowWriteSpeedLimit;
uint64_t diskSampleWriteSize;
bool diskShared;
uint64_t memorySizeBytes;
uint32_t cpuCores;
Config(uint64_t diskSizeBytes_,
double diskWriteSpeedOverride_,
double slowWriteSpeedLimit_,
double diskSampleWriteSize_,
bool diskShared_,
uint64_t memorySizeBytes_,
uint32_t cpuCores_)
: diskSizeBytes(diskSizeBytes_),
diskWriteSpeedOverride(diskWriteSpeedOverride_),
slowWriteSpeedLimit(slowWriteSpeedLimit_),
diskSampleWriteSize(diskSampleWriteSize_),
diskShared(diskShared_),
memorySizeBytes(memorySizeBytes_),
cpuCores(cpuCores_)
{
}
};
private:
HwInfo _hwInfo;
using Clock = std::chrono::system_clock;
Clock::time_point _sampleTime;
double _diskWriteSpeed;
void setup(const HwInfo::Disk &disk, const HwInfo::Memory &memory, const HwInfo::Cpu &cpu);
void setDiskWriteSpeed(const vespalib::string &path, const Config &config);
void sampleDiskWriteSpeed(const vespalib::string &path, const Config &config);
public:
HwInfoSampler(const vespalib::string &path, const Config &config);
~HwInfoSampler();
const HwInfo &hwInfo() const { return _hwInfo; }
std::chrono::time_point<Clock> sampleTime() const { return _sampleTime; }
double diskWriteSpeed() const { return _diskWriteSpeed; }
};
}
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