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IORequestGenerator.cpp
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IORequestGenerator.cpp
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/*
DISKSPD
Copyright(c) Microsoft Corporation
All rights reserved.
MIT License
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
//FUTURE EXTENSION: make it compile with /W4
// Windows 7
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0601
#endif
#include "common.h"
#include "IORequestGenerator.h"
#include <stdio.h>
#include <stdlib.h>
#include <Winioctl.h> //DISK_GEOMETRY
#include <windows.h>
#include <stddef.h>
#include <Wmistr.h> //WNODE_HEADER
#include "etw.h"
#include <assert.h>
#include "ThroughputMeter.h"
#include "OverlappedQueue.h"
// Flags for RtlFlushNonVolatileMemory
#ifndef FLUSH_NV_MEMORY_IN_FLAG_NO_DRAIN
#define FLUSH_NV_MEMORY_IN_FLAG_NO_DRAIN (0x00000001)
#endif
/*****************************************************************************/
// gets size of a dynamic volume, return zero on failure
//
UINT64 GetDynamicPartitionSize(HANDLE hFile)
{
assert(NULL != hFile && INVALID_HANDLE_VALUE != hFile);
UINT64 size = 0;
VOLUME_DISK_EXTENTS diskExt = {0};
PVOLUME_DISK_EXTENTS pDiskExt = &diskExt;
DWORD bytesReturned;
DWORD status = ERROR_SUCCESS;
BOOL rslt;
OVERLAPPED ovlp = {0};
ovlp.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (ovlp.hEvent == nullptr)
{
PrintError("ERROR: Failed to create event (error code: %u)\n", GetLastError());
return 0;
}
rslt = DeviceIoControl(hFile,
IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
NULL,
0,
pDiskExt,
sizeof(VOLUME_DISK_EXTENTS),
&bytesReturned,
&ovlp);
if (!rslt) {
status = GetLastError();
if (status == ERROR_MORE_DATA) {
status = ERROR_SUCCESS;
bytesReturned = sizeof(VOLUME_DISK_EXTENTS) + ((pDiskExt->NumberOfDiskExtents - 1) * sizeof(DISK_EXTENT));
pDiskExt = (PVOLUME_DISK_EXTENTS)LocalAlloc(LPTR, bytesReturned);
if (pDiskExt)
{
rslt = DeviceIoControl(hFile,
IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS,
NULL,
0,
pDiskExt,
bytesReturned,
&bytesReturned,
&ovlp);
if (!rslt)
{
status = GetLastError();
if (status == ERROR_IO_PENDING)
{
if (WAIT_OBJECT_0 != WaitForSingleObject(ovlp.hEvent, INFINITE))
{
status = GetLastError();
PrintError("ERROR: Failed while waiting for event to be signaled (error code: %u)\n", status);
}
else
{
status = ERROR_SUCCESS;
assert(pDiskExt->NumberOfDiskExtents <= 1);
}
}
else
{
PrintError("ERROR: Could not obtain dynamic volume extents (error code: %u)\n", status);
}
}
}
else
{
status = GetLastError();
PrintError("ERROR: Could not allocate memory (error code: %u)\n", status);
}
}
else if (status == ERROR_IO_PENDING)
{
if (WAIT_OBJECT_0 != WaitForSingleObject(ovlp.hEvent, INFINITE))
{
status = GetLastError();
PrintError("ERROR: Failed while waiting for event to be signaled (error code: %u)\n", status);
}
else
{
status = ERROR_SUCCESS;
assert(pDiskExt->NumberOfDiskExtents <= 1);
}
}
else
{
PrintError("ERROR: Could not obtain dynamic volume extents (error code: %u)\n", status);
}
}
else
{
assert(pDiskExt->NumberOfDiskExtents <= 1);
}
if (status == ERROR_SUCCESS)
{
for (DWORD n = 0; n < pDiskExt->NumberOfDiskExtents; n++) {
size += pDiskExt->Extents[n].ExtentLength.QuadPart;
}
}
if (pDiskExt && (pDiskExt != &diskExt)) {
LocalFree(pDiskExt);
}
CloseHandle(ovlp.hEvent);
return size;
}
/*****************************************************************************/
// gets partition size, return zero on failure
//
UINT64 GetPartitionSize(HANDLE hFile)
{
assert(NULL != hFile && INVALID_HANDLE_VALUE != hFile);
PARTITION_INFORMATION_EX pinf;
OVERLAPPED ovlp = {};
ovlp.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (ovlp.hEvent == nullptr)
{
PrintError("ERROR: Failed to create event (error code: %u)\n", GetLastError());
return 0;
}
DWORD rbcnt = 0;
DWORD status = ERROR_SUCCESS;
UINT64 size = 0;
if (!DeviceIoControl(hFile,
IOCTL_DISK_GET_PARTITION_INFO_EX,
NULL,
0,
&pinf,
sizeof(pinf),
&rbcnt,
&ovlp)
)
{
status = GetLastError();
if (status == ERROR_IO_PENDING)
{
if (WAIT_OBJECT_0 != WaitForSingleObject(ovlp.hEvent, INFINITE))
{
PrintError("ERROR: Failed while waiting for event to be signaled (error code: %u)\n", GetLastError());
}
else
{
size = pinf.PartitionLength.QuadPart;
}
}
else
{
size = GetDynamicPartitionSize(hFile);
}
}
else
{
size = pinf.PartitionLength.QuadPart;
}
CloseHandle(ovlp.hEvent);
return size;
}
/*****************************************************************************/
// gets physical drive size, return zero on failure
//
UINT64 GetPhysicalDriveSize(HANDLE hFile)
{
assert(NULL != hFile && INVALID_HANDLE_VALUE != hFile);
DISK_GEOMETRY_EX geom;
OVERLAPPED ovlp = {};
ovlp.hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (ovlp.hEvent == nullptr)
{
PrintError("ERROR: Failed to create event (error code: %u)\n", GetLastError());
return 0;
}
DWORD rbcnt = 0;
DWORD status = ERROR_SUCCESS;
BOOL rslt;
rslt = DeviceIoControl(hFile,
IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
NULL,
0,
&geom,
sizeof(geom),
&rbcnt,
&ovlp);
if (!rslt)
{
status = GetLastError();
if (status == ERROR_IO_PENDING)
{
if (WAIT_OBJECT_0 != WaitForSingleObject(ovlp.hEvent, INFINITE))
{
PrintError("ERROR: Failed while waiting for event to be signaled (error code: %u)\n", GetLastError());
}
else
{
rslt = TRUE;
}
}
else
{
PrintError("ERROR: Could not obtain drive geometry (error code: %u)\n", status);
}
}
CloseHandle(ovlp.hEvent);
if (!rslt)
{
return 0;
}
return (UINT64)geom.DiskSize.QuadPart;
}
/*****************************************************************************/
// activates specified privilege in process token
//
bool SetPrivilege(LPCSTR pszPrivilege, LPCSTR pszErrorPrefix = "ERROR:")
{
TOKEN_PRIVILEGES TokenPriv;
HANDLE hToken = INVALID_HANDLE_VALUE;
DWORD dwError;
bool fOk = true;
if (!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &hToken))
{
PrintError("%s Error opening process token (error code: %u)\n", pszErrorPrefix, GetLastError());
fOk = false;
goto cleanup;
}
TokenPriv.PrivilegeCount = 1;
TokenPriv.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if (!LookupPrivilegeValue(nullptr, pszPrivilege, &TokenPriv.Privileges[0].Luid))
{
PrintError("%s Error looking up privilege value %s (error code: %u)\n", pszErrorPrefix, pszPrivilege, GetLastError());
fOk = false;
goto cleanup;
}
if (!AdjustTokenPrivileges(hToken, FALSE, &TokenPriv, 0, nullptr, nullptr))
{
PrintError("%s Error adjusting token privileges for %s (error code: %u)\n", pszErrorPrefix, pszPrivilege, GetLastError());
fOk = false;
goto cleanup;
}
if (ERROR_SUCCESS != (dwError = GetLastError()))
{
PrintError("%s Error adjusting token privileges for %s (error code: %u)\n", pszErrorPrefix, pszPrivilege, dwError);
fOk = false;
goto cleanup;
}
cleanup:
if (hToken != INVALID_HANDLE_VALUE)
{
CloseHandle(hToken);
}
return fOk;
}
BOOL
DisableLocalCache(
HANDLE h
)
/*++
Routine Description:
Disables local caching of I/O to a file by SMB. All reads/writes will flow to the server.
Arguments:
h - Handle to the file
Return Value:
Returns ERROR_SUCCESS (0) on success, nonzero error code on failure.
--*/
{
DWORD BytesReturned = 0;
OVERLAPPED Overlapped = { 0 };
DWORD Status = ERROR_SUCCESS;
BOOL Success = false;
Overlapped.hEvent = CreateEvent(nullptr, true, false, nullptr);
if (!Overlapped.hEvent)
{
return GetLastError();
}
#ifndef FSCTL_DISABLE_LOCAL_BUFFERING
#define FSCTL_DISABLE_LOCAL_BUFFERING CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 174, METHOD_BUFFERED, FILE_ANY_ACCESS)
#endif
Success = DeviceIoControl(h,
FSCTL_DISABLE_LOCAL_BUFFERING,
nullptr,
0,
nullptr,
0,
nullptr,
&Overlapped);
if (!Success) {
Status = GetLastError();
}
if (!Success && Status == ERROR_IO_PENDING)
{
if (!GetOverlappedResult(h, &Overlapped, &BytesReturned, true))
{
Status = GetLastError();
}
else
{
Status = (DWORD) Overlapped.Internal;
}
}
if (Overlapped.hEvent)
{
CloseHandle(Overlapped.hEvent);
}
return Status;
}
/*****************************************************************************/
// structures and global variables
//
struct ETWEventCounters g_EtwEventCounters;
__declspec(align(4)) static LONG volatile g_lRunningThreadsCount = 0; //must be aligned on a 32-bit boundary, otherwise InterlockedIncrement
//and InterlockedDecrement will fail on 64-bit systems
static BOOL volatile g_bRun; //used for letting threads know that they should stop working
typedef NTSTATUS (__stdcall *NtQuerySysInfo)(SYSTEM_INFORMATION_CLASS, PVOID, ULONG, PULONG);
static NtQuerySysInfo g_pfnNtQuerySysInfo;
typedef VOID (__stdcall *RtlCopyMemNonTemporal)(VOID UNALIGNED *, VOID UNALIGNED *, SIZE_T);
static RtlCopyMemNonTemporal g_pfnRtlCopyMemoryNonTemporal;
typedef NTSTATUS (__stdcall *RtlFlushNvMemory)(PVOID, PVOID, SIZE_T, ULONG);
static RtlFlushNvMemory g_pfnRtlFlushNonVolatileMemory;
typedef NTSTATUS(__stdcall *RtlGetNvToken)(PVOID, SIZE_T, PVOID *);
static RtlGetNvToken g_pfnRtlGetNonVolatileToken;
typedef NTSTATUS(__stdcall *RtlFreeNvToken)(PVOID);
static RtlFreeNvToken g_pfnRtlFreeNonVolatileToken;
static BOOL volatile g_bThreadError = FALSE; //true means that an error has occured in one of the threads
BOOL volatile g_bTracing = TRUE; //true means that ETW is turned on
// TODO: is this still needed?
__declspec(align(4)) static LONG volatile g_lGeneratorRunning = 0; //used to detect if GenerateRequests is already running
static BOOL volatile g_bError = FALSE; //true means there was fatal error during intialization and threads shouldn't perform their work
VOID SetProcGroupMask(WORD wGroupNum, ULONG dwProcNum, PGROUP_AFFINITY pGroupAffinity)
{
//must zero this structure first, otherwise it fails to set affinity
memset(pGroupAffinity, 0, sizeof(GROUP_AFFINITY));
pGroupAffinity->Group = wGroupNum;
pGroupAffinity->Mask = (KAFFINITY)1<<dwProcNum;
}
VOID SetGroupMask(WORD wGroupNum, KAFFINITY Mask, PGROUP_AFFINITY pGroupAffinity)
{
//must zero this structure first, otherwise it fails to set affinity
memset(pGroupAffinity, 0, sizeof(GROUP_AFFINITY));
pGroupAffinity->Group = wGroupNum;
pGroupAffinity->Mask = Mask;
}
/*****************************************************************************/
void IORequestGenerator::_CloseOpenFiles(vector<HANDLE>& vhFiles) const
{
for (size_t x = 0; x < vhFiles.size(); ++x)
{
if ((INVALID_HANDLE_VALUE != vhFiles[x]) && (nullptr != vhFiles[x]))
{
if (!CloseHandle(vhFiles[x]))
{
PrintError("Warning: unable to close file handle (error code: %u)\n", GetLastError());
}
vhFiles[x] = nullptr;
}
}
}
/*****************************************************************************/
// wrapper for stderr
void PrintError(const char *format, ...)
{
assert(NULL != format);
va_list listArg;
va_start(listArg, format);
vfprintf(stderr, format, listArg);
va_end(listArg);
}
/*****************************************************************************/
// prints the string only if verbose mode is set to true
//
static void PrintVerbose(bool fVerbose, const char *format, ...)
{
assert(NULL != format);
if(fVerbose )
{
SYSTEMTIME now;
char szBuffer[64]; // enough for timestamp+null
int nWritten;
GetLocalTime(&now);
if (now.wYear) {
// Mimic .NET 's' sortable time pattern
nWritten = sprintf_s(szBuffer, _countof(szBuffer),
"%u-%02u-%02uT%02u:%02u:%02u",
now.wYear,
now.wMonth,
now.wDay,
now.wHour,
now.wMinute,
now.wSecond);
assert(nWritten && nWritten < _countof(szBuffer));
// no newline
printf("%s: " ,szBuffer);
}
va_list argList;
va_start(argList, format);
vprintf(format, argList);
va_end(argList);
}
}
/*****************************************************************************/
// thread for gathering ETW data (etw functions are defined in etw.cpp)
//
DWORD WINAPI etwThreadFunc(LPVOID cookie)
{
UNREFERENCED_PARAMETER(cookie);
g_bTracing = TRUE;
BOOL result = TraceEvents();
g_bTracing = FALSE;
return result ? 0 : 1;
}
/*****************************************************************************/
bool IORequestGenerator::_LoadDLLs()
{
_hNTDLL = LoadLibraryExW(L"ntdll.dll", nullptr, 0);
if( nullptr == _hNTDLL )
{
return false;
}
g_pfnNtQuerySysInfo = (NtQuerySysInfo)GetProcAddress(_hNTDLL, "NtQuerySystemInformation");
if( nullptr == g_pfnNtQuerySysInfo )
{
return false;
}
g_pfnRtlCopyMemoryNonTemporal = (RtlCopyMemNonTemporal)GetProcAddress(_hNTDLL, "RtlCopyMemoryNonTemporal");
g_pfnRtlFlushNonVolatileMemory = (RtlFlushNvMemory)GetProcAddress(_hNTDLL, "RtlFlushNonVolatileMemory");
g_pfnRtlGetNonVolatileToken = (RtlGetNvToken)GetProcAddress(_hNTDLL, "RtlGetNonVolatileToken");
g_pfnRtlFreeNonVolatileToken = (RtlFreeNvToken)GetProcAddress(_hNTDLL, "RtlFreeNonVolatileToken");
return true;
}
/*****************************************************************************/
bool IORequestGenerator::_GetSystemPerfInfo(vector<SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION>& vSPPI, bool fVerbose) const
{
NTSTATUS Status;
ULONG CpuBase;
WORD Group;
WORD GroupCount;
GROUP_AFFINITY GroupAffinity;
for (CpuBase = 0, Group = 0, GroupCount = (WORD) g_SystemInformation.processorTopology._vProcessorGroupInformation.size();
Group < GroupCount;
Group++)
{
ProcessorGroupInformation *pGroup = &g_SystemInformation.processorTopology._vProcessorGroupInformation[Group];
//
// Note that an inactive group is not queried (its not clear this is a practical case).
// Correct operation assumes the input SPPI array is prezeroed, which DISKSPD does do via
// default vector(size_t) construction.
//
if (pGroup->_activeProcessorCount != 0)
{
//
// In multigroup environments, affinitize to the group we're querying counters from.
//
if (GroupCount > 1)
{
SetGroupMask(Group, pGroup->_activeProcessorMask, &GroupAffinity);
if (!SetThreadGroupAffinity(GetCurrentThread(), &GroupAffinity, nullptr))
{
PrintError("get system perf info: failed to set affinity to Group %u\n", GroupAffinity.Group);
return false;
}
}
//
// The SPPI vector should (is) always be sized to span CPUs for all groups, make this explicit.
//
if (CpuBase + pGroup->_activeProcessorCount > vSPPI.size())
{
PrintError("get system perf info: unable to return (base CPU %u + group active CPU %u > size %u)\n",
CpuBase,
pGroup->_activeProcessorCount,
vSPPI.size());
assert(false);
return false;
}
Status = g_pfnNtQuerySysInfo(SystemProcessorPerformanceInformation,
&vSPPI[CpuBase],
sizeof(SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION) * pGroup->_activeProcessorCount,
nullptr);
if (!NT_SUCCESS(Status))
{
PrintError("get system perf info: status 0x%x querying for Group %u (%u CPUs)\n",
Status,
Group,
pGroup->_activeProcessorCount);
return false;
}
PrintVerbose(fVerbose,
"get system perf info: queried for Group %u (%u CPUs)\n",
Group,
pGroup->_activeProcessorCount);
}
CpuBase += pGroup->_activeProcessorCount;
}
return true;
}
VOID CALLBACK fileIOCompletionRoutine(DWORD dwErrorCode, DWORD dwBytesTransferred, LPOVERLAPPED pOverlapped);
static bool issueNextIO(ThreadParameters *p, IORequest *pIORequest, DWORD *pdwBytesTransferred, bool useCompletionRoutines)
{
OVERLAPPED *pOverlapped = pIORequest->GetOverlapped();
Target *pTarget = pIORequest->GetCurrentTarget();
size_t iTarget = pIORequest->GetCurrentTargetIndex();
UINT32 iRequest = pIORequest->GetRequestIndex();
LARGE_INTEGER li;
BOOL rslt = true;
//
// Compute next IO
//
p->vTargetStates[iTarget].NextIORequest(*pIORequest);
li.LowPart = pIORequest->GetOverlapped()->Offset;
li.HighPart = pIORequest->GetOverlapped()->OffsetHigh;
if (TraceLoggingProviderEnabled(g_hEtwProvider,
TRACE_LEVEL_VERBOSE,
DISKSPD_TRACE_IO))
{
GUID ActivityId = p->NextActivityId();
pIORequest->SetActivityId(ActivityId);
TraceLoggingWriteActivity(g_hEtwProvider,
"DiskSpd IO",
&ActivityId,
NULL,
TraceLoggingKeyword(DISKSPD_TRACE_IO),
TraceLoggingOpcode(EVENT_TRACE_TYPE_START),
TraceLoggingLevel(TRACE_LEVEL_VERBOSE),
TraceLoggingUInt32(p->ulThreadNo, "Thread"),
TraceLoggingString(pIORequest->GetIoType() == IOOperation::ReadIO ? "Read" : "Write", "IO Type"),
TraceLoggingUInt64(iTarget, "Target"),
TraceLoggingInt32(pTarget->GetBlockSizeInBytes(), "Block Size"),
TraceLoggingInt64(li.QuadPart, "Offset"));
}
#if 0
PrintError("t[%u:%u] issuing %u %s @ %I64u)\n", p->ulThreadNo, iTarget,
pTarget->GetBlockSizeInBytes(),
(pIORequest->GetIoType() == IOOperation::ReadIO ? "read" : "write"),
li.QuadPart);
#endif
if (p->pTimeSpan->GetMeasureLatency() || p->pTimeSpan->GetCalculateIopsStdDev())
{
pIORequest->SetStartTime(PerfTimer::GetTime());
}
if (pIORequest->GetIoType() == IOOperation::ReadIO)
{
if (pTarget->GetMemoryMappedIoMode() == MemoryMappedIoMode::On)
{
if (pTarget->GetWriteThroughMode() == WriteThroughMode::On )
{
g_pfnRtlCopyMemoryNonTemporal(p->GetReadBuffer(iTarget, iRequest), pTarget->GetMappedView() + li.QuadPart, pTarget->GetBlockSizeInBytes());
}
else
{
memcpy(p->GetReadBuffer(iTarget, iRequest), pTarget->GetMappedView() + li.QuadPart, pTarget->GetBlockSizeInBytes());
}
*pdwBytesTransferred = pTarget->GetBlockSizeInBytes();
}
else
{
if (useCompletionRoutines)
{
rslt = ReadFileEx(p->vhTargets[iTarget], p->GetReadBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes(), pOverlapped, fileIOCompletionRoutine);
}
else
{
rslt = ReadFile(p->vhTargets[iTarget], p->GetReadBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes(), pdwBytesTransferred, pOverlapped);
}
}
}
else
{
if (pTarget->GetMemoryMappedIoMode() == MemoryMappedIoMode::On)
{
if (pTarget->GetWriteThroughMode() == WriteThroughMode::On)
{
g_pfnRtlCopyMemoryNonTemporal(pTarget->GetMappedView() + li.QuadPart, p->GetWriteBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes());
}
else
{
memcpy(pTarget->GetMappedView() + li.QuadPart, p->GetWriteBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes());
switch (pTarget->GetMemoryMappedIoFlushMode())
{
case MemoryMappedIoFlushMode::ViewOfFile:
FlushViewOfFile(pTarget->GetMappedView() + li.QuadPart, pTarget->GetBlockSizeInBytes());
break;
case MemoryMappedIoFlushMode::NonVolatileMemory:
g_pfnRtlFlushNonVolatileMemory(pTarget->GetMemoryMappedIoNvToken(), pTarget->GetMappedView() + li.QuadPart, pTarget->GetBlockSizeInBytes(), 0);
break;
case MemoryMappedIoFlushMode::NonVolatileMemoryNoDrain:
g_pfnRtlFlushNonVolatileMemory(pTarget->GetMemoryMappedIoNvToken(), pTarget->GetMappedView() + li.QuadPart, pTarget->GetBlockSizeInBytes(), FLUSH_NV_MEMORY_IN_FLAG_NO_DRAIN);
break;
}
}
*pdwBytesTransferred = pTarget->GetBlockSizeInBytes();
}
else
{
if (useCompletionRoutines)
{
rslt = WriteFileEx(p->vhTargets[iTarget], p->GetWriteBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes(), pOverlapped, fileIOCompletionRoutine);
}
else
{
rslt = WriteFile(p->vhTargets[iTarget], p->GetWriteBuffer(iTarget, iRequest), pTarget->GetBlockSizeInBytes(), pdwBytesTransferred, pOverlapped);
}
}
}
if (p->vThroughputMeters.size() != 0 && p->vThroughputMeters[iTarget].IsRunning())
{
p->vThroughputMeters[iTarget].Adjust(pTarget->GetBlockSizeInBytes());
}
return (rslt) ? true : false;
}
void completeIOat(ThreadParameters *p, IORequest *pIORequest, DWORD dwBytesTransferred, UINT64 ullCompletionTime)
{
if (*p->pfAccountingOn)
{
p->pResults->vTargetResults[pIORequest->GetCurrentTargetIndex()].Add(
dwBytesTransferred,
pIORequest->GetIoType(),
pIORequest->GetStartTime(),
ullCompletionTime,
*(p->pullStartTime),
p->pTimeSpan->GetMeasureLatency(),
p->pTimeSpan->GetCalculateIopsStdDev());
}
if (TraceLoggingProviderEnabled(g_hEtwProvider,
TRACE_LEVEL_VERBOSE,
DISKSPD_TRACE_IO))
{
GUID ActivityId = pIORequest->GetActivityId();
TraceLoggingWriteActivity(g_hEtwProvider,
"DiskSpd IO",
&ActivityId,
NULL,
TraceLoggingKeyword(DISKSPD_TRACE_IO),
TraceLoggingOpcode(EVENT_TRACE_TYPE_STOP),
TraceLoggingLevel(TRACE_LEVEL_VERBOSE));
}
Target *pTarget = pIORequest->GetCurrentTarget();
//check if I/O transferred all of the requested bytes
if (dwBytesTransferred != pTarget->GetBlockSizeInBytes())
{
PrintError("Warning: thread %u transferred %u bytes instead of %u bytes\n",
p->ulThreadNo,
dwBytesTransferred,
pTarget->GetBlockSizeInBytes());
}
// check if we should print a progress dot
if (p->pProfile->GetProgress() != 0)
{
DWORD dwIOCnt = ++p->dwIOCnt;
if (dwIOCnt % p->pProfile->GetProgress() == 0)
{
printf(".");
}
}
}
void completeIO(ThreadParameters *p, IORequest *pIORequest, DWORD dwBytesTransferred)
{
if (p->pTimeSpan->GetMeasureLatency() || p->pTimeSpan->GetCalculateIopsStdDev())
{
completeIOat(p, pIORequest, dwBytesTransferred, PerfTimer::GetTime());
}
else
{
completeIOat(p, pIORequest, dwBytesTransferred, 0);
}
}
/*****************************************************************************/
// function called from worker thread
// performs synch I/O
//
static bool doWorkUsingSynchronousIO(ThreadParameters *p)
{
BOOL fOk = true;
BOOL rslt = FALSE;
DWORD dwBytesTransferred;
size_t cIORequests = p->vIORequest.size();
while(g_bRun && !g_bThreadError)
{
DWORD nIssued = 0;
DWORD dwMinSleepTime = INFINITE;
for (size_t i = 0; i < cIORequests; i++)
{
IORequest *pIORequest = &p->vIORequest[i];
Target *pTarget = pIORequest->GetNextTarget();
if (p->vThroughputMeters.size() != 0)
{
size_t iTarget = pTarget - &p->vTargets[0];
ThroughputMeter *pThroughputMeter = &p->vThroughputMeters[iTarget];
DWORD dwSleepTime = pThroughputMeter->GetSleepTime();
dwMinSleepTime = min(dwMinSleepTime, dwSleepTime);
if (pThroughputMeter->IsRunning() && dwSleepTime > 0)
{
continue;
}
}
nIssued += 1;
rslt = issueNextIO(p, pIORequest, &dwBytesTransferred, false);
if (!rslt)
{
PrintError("t[%u] error during %s error code: %u)\n", (UINT32)i, (pIORequest->GetIoType() == IOOperation::ReadIO ? "read" : "write"), GetLastError());
fOk = false;
goto cleanup;
}
completeIO(p, pIORequest, dwBytesTransferred);
}
// if no IOs were issued, wait for the next scheduling time
if (!nIssued && dwMinSleepTime != INFINITE && dwMinSleepTime != 0)
{
p->pResults->WaitStats.ThrottleSleep += 1;
Sleep(dwMinSleepTime);
}
assert(!g_bError); // at this point we shouldn't be seeing initialization error
}
cleanup:
return fOk;
}
/*****************************************************************************/
// function called from worker thread
// performs asynch I/O using IO Completion Ports
//
static bool doWorkUsingIOCompletionPorts(ThreadParameters *p, HANDLE hCompletionPort)
{
assert(nullptr != p);
assert(nullptr != hCompletionPort);
BOOL fOk = true;
BOOL rslt = FALSE;
DWORD dwBytesTransferred;
OverlappedQueue overlappedQueue;
size_t cIORequests = p->vIORequest.size();
BOOL fLatencyStats = p->pTimeSpan->GetMeasureLatency() || p->pTimeSpan->GetCalculateIopsStdDev();
for (size_t i = 0; i < cIORequests; i++)
{
overlappedQueue.Add(p->vIORequest[i].GetOverlapped());
}
//
// perform work
//
DWORD dwMinSleepTime = INFINITE;
DWORD dwWaitTime;
OVERLAPPED_ENTRY ovlEntry[16];
const ULONG cOvlEntryMax = _countof(ovlEntry) < (ULONG)cIORequests ? _countof(ovlEntry) : (ULONG)cIORequests;
ULONG cCompleted;
size_t cUntilThrottle = cIORequests;
while(g_bRun && !g_bThreadError)
{
OVERLAPPED *pReadyOverlapped = overlappedQueue.Remove();
IORequest *pIORequest = IORequest::OverlappedToIORequest(pReadyOverlapped);
(void) pIORequest->GetNextTarget();
// check throttles
if (p->vThroughputMeters.size() != 0)
{
ThroughputMeter *pThroughputMeter = &p->vThroughputMeters[pIORequest->GetCurrentTargetIndex()];
cUntilThrottle -= 1;
DWORD dwSleepTime = pThroughputMeter->GetSleepTime();
if (pThroughputMeter->IsRunning() && dwSleepTime > 0)
{
dwMinSleepTime = min(dwMinSleepTime, dwSleepTime);
overlappedQueue.Add(pReadyOverlapped);
// continue if throttle not hit
if (cUntilThrottle)
{
continue;
}
// at throttle, no IO to dispatch
pIORequest = NULL;
}
}
// dispatch IO - skipped iff at throttle
if (pIORequest)
{
rslt = issueNextIO(p, pIORequest, &dwBytesTransferred, false);
if (!rslt && GetLastError() != ERROR_IO_PENDING)
{
UINT32 iIORequest = (UINT32)(pIORequest - &p->vIORequest[0]);
PrintError("t[%u] error during %s error code: %u)\n", iIORequest, (pIORequest->GetIoType()== IOOperation::ReadIO ? "read" : "write"), GetLastError());
fOk = false;
goto cleanup;
}
if (rslt && pIORequest->GetCurrentTarget()->GetMemoryMappedIoMode() == MemoryMappedIoMode::On)
{
completeIO(p, pIORequest, dwBytesTransferred);
overlappedQueue.Add(pReadyOverlapped);
// a completed memory mapped IO resets the throttle so that we traverse
// back to it in fair-order before considering throttle again.
// note this will drop through to lookside for completions, not wait
dwMinSleepTime = INFINITE;
cUntilThrottle = overlappedQueue.GetCount();
}
}
// look for IO completion
// queue is fully dispatched: set wait, reset throttle wait
if (!overlappedQueue.GetCount())
{
assert(!cUntilThrottle);
dwWaitTime = dwMinSleepTime = INFINITE;
p->pResults->WaitStats.Wait += 1;
}
// queue is not fully dispatched ...
// if at the throttle, wait throttle time and reset
else if (!cUntilThrottle)
{
dwWaitTime = dwMinSleepTime;
dwMinSleepTime = INFINITE;
cUntilThrottle = overlappedQueue.GetCount();
if (cIORequests == cUntilThrottle)
{
// all throttled, none dispatched - just sleep
p->pResults->WaitStats.ThrottleSleep += 1;
Sleep(dwWaitTime);
continue;