/*
* Native Windows async IO engine
- * Copyright (C) 2010 Bruce Cran <bruce@cran.org.uk>
+ * Copyright (C) 2011 Bruce Cran <bruce@cran.org.uk>
*/
#include <stdio.h>
#include "../fio.h"
-typedef struct {
- OVERLAPPED o;
- struct io_u *io_u;
-} FIO_OVERLAPPED;
+typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped);
-struct windowsaio_data {
- HANDLE *io_handles;
- unsigned int io_index;
- FIO_OVERLAPPED *ovls;
-
- HANDLE iothread;
- HANDLE iothread_stopped;
- BOOL iothread_running;
+struct fio_overlapped {
+ OVERLAPPED o;
+ struct io_u *io_u;
+ BOOL io_complete;
+ BOOL io_free;
+};
+struct windowsaio_data {
+ struct fio_overlapped *ovls;
struct io_u **aio_events;
+ HANDLE iothread;
HANDLE iocomplete_event;
- BOOL have_cancelioex;
+ CANCELIOEX pCancelIoEx;
+ BOOL iothread_running;
};
struct thread_ctx {
struct windowsaio_data *wd;
};
-static void PrintError(LPCSTR lpszFunction);
static int fio_windowsaio_cancel(struct thread_data *td,
struct io_u *io_u);
-static BOOL TimedOut(DWORD start_count, DWORD end_count);
+static BOOL timeout_expired(DWORD start_count, DWORD end_count);
static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
unsigned int max, struct timespec *t);
static struct io_u *fio_windowsaio_event(struct thread_data *td, int event);
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f);
static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f);
-/* CancelIoEx isn't in Cygwin's w32api */
-BOOL WINAPI CancelIoEx(
- HANDLE hFile,
- LPOVERLAPPED lpOverlapped
-);
-
-
-
int sync_file_range(int fd, off64_t offset, off64_t nbytes,
unsigned int flags)
{
return -1;
}
-static void PrintError(LPCSTR lpszFunction)
-{
- // Retrieve the system error message for the last-error code
-
- LPSTR lpMsgBuf;
- DWORD dw = GetLastError();
-
- FormatMessage(
- FORMAT_MESSAGE_ALLOCATE_BUFFER |
- FORMAT_MESSAGE_FROM_SYSTEM |
- FORMAT_MESSAGE_IGNORE_INSERTS,
- NULL,
- dw,
- MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
- (LPTSTR)&lpMsgBuf,
- 0, NULL );
-
- log_err("%s - %s", lpszFunction, lpMsgBuf);
- LocalFree(lpMsgBuf);
-}
-
-static int fio_windowsaio_cancel(struct thread_data *td,
- struct io_u *io_u)
-{
- int rc = 0;
-
- struct windowsaio_data *wd = td->io_ops->data;
-
- /* If we're running on Vista, we can cancel individual IO requests */
- if (wd->have_cancelioex) {
- FIO_OVERLAPPED *ovl = io_u->engine_data;
- if (!CancelIoEx(io_u->file->hFile, &ovl->o))
- rc = 1;
- } else
- rc = 1;
-
- return rc;
-}
-
-static BOOL TimedOut(DWORD start_count, DWORD end_count)
-{
- BOOL expired = FALSE;
- DWORD current_time;
-
- current_time = GetTickCount();
-
- if ((end_count > start_count) && current_time >= end_count)
- expired = TRUE;
- else if (current_time < start_count && current_time > end_count)
- expired = TRUE;
-
- return expired;
-}
-
-static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
- unsigned int max, struct timespec *t)
-{
- struct windowsaio_data *wd = td->io_ops->data;
- struct flist_head *entry;
- unsigned int dequeued = 0;
- struct io_u *io_u;
- DWORD start_count = 0, end_count = 0;
- BOOL timedout = FALSE;
- unsigned int mswait = 100;
-
- if (t != NULL) {
- mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
- start_count = GetTickCount();
- end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
- }
-
- while (dequeued < min && !timedout) {
- flist_for_each(entry, &td->io_u_busylist) {
- io_u = flist_entry(entry, struct io_u, list);
-
- if (io_u->seen == 1) {
- io_u->seen = 2;
- wd->aio_events[dequeued] = io_u;
- dequeued++;
- }
-
- if (dequeued == max)
- break;
- }
-
- if (dequeued < min) {
- WaitForSingleObject(wd->iocomplete_event, mswait);
- }
-
- if (t != NULL && TimedOut(start_count, end_count))
- timedout = TRUE;
- }
-
- return dequeued;
-}
-
-static struct io_u *fio_windowsaio_event(struct thread_data *td, int event)
-{
- struct windowsaio_data *wd = td->io_ops->data;
- return wd->aio_events[event];
-}
-
-static int fio_windowsaio_queue(struct thread_data *td,
- struct io_u *io_u)
-{
- struct windowsaio_data *wd;
- DWORD iobytes;
- BOOL success = TRUE;
- int ind;
- int rc;
-
- fio_ro_check(td, io_u);
-
- wd = td->io_ops->data;
- ind = wd->io_index;
-
- ResetEvent(wd->io_handles[ind]);
- wd->ovls[ind].o.Internal = 0;
- wd->ovls[ind].o.InternalHigh = 0;
- wd->ovls[ind].o.Offset = io_u->offset & 0xFFFFFFFF;
- wd->ovls[ind].o.OffsetHigh = io_u->offset >> 32;
- wd->ovls[ind].o.hEvent = wd->io_handles[ind];
- wd->ovls[ind].io_u = io_u;
-
- io_u->engine_data = &wd->ovls[ind];
- io_u->seen = 0;
-
- if (io_u->ddir == DDIR_WRITE) {
- success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, &wd->ovls[ind].o);
- } else if (io_u->ddir == DDIR_READ) {
- success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, &wd->ovls[ind].o);
- } else if (io_u->ddir == DDIR_SYNC ||
- io_u->ddir == DDIR_DATASYNC ||
- io_u->ddir == DDIR_SYNC_FILE_RANGE)
- {
- FlushFileBuffers(io_u->file->hFile);
- return FIO_Q_COMPLETED;
- } else if (io_u->ddir == DDIR_TRIM) {
- log_info("explicit TRIM isn't supported on Windows");
- return FIO_Q_COMPLETED;
- } else
- assert(0);
-
- if (success) {
- io_u->seen = 1;
- io_u->resid = io_u->xfer_buflen - iobytes;
- io_u->error = 0;
- rc = FIO_Q_COMPLETED;
- } else if (!success && GetLastError() == ERROR_IO_PENDING) {
- wd->io_index = (wd->io_index + 1) % (2 * td->o.iodepth);
- rc = FIO_Q_QUEUED;
- } else {
- PrintError(__func__);
- io_u->error = GetLastError();
- io_u->resid = io_u->xfer_buflen;
- rc = FIO_Q_COMPLETED;
- }
-
- return rc;
-}
-
-static void fio_windowsaio_cleanup(struct thread_data *td)
-{
- int i;
- struct windowsaio_data *wd;
-
- wd = td->io_ops->data;
-
- WaitForSingleObject(wd->iothread_stopped, INFINITE);
-
- if (wd != NULL) {
- CloseHandle(wd->iothread);
- CloseHandle(wd->iothread_stopped);
- CloseHandle(wd->iocomplete_event);
-
- for (i = 0; i < 2 * td->o.iodepth; i++) {
- CloseHandle(wd->io_handles[i]);
- }
-
- free(wd->aio_events);
- free(wd->io_handles);
- free(wd->ovls);
- free(wd);
-
- td->io_ops->data = NULL;
- }
-}
-
-/* Runs as a thread and waits for queued IO to complete */
-static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter)
-{
- OVERLAPPED *ovl;
- FIO_OVERLAPPED *fov;
- struct io_u *io_u;
- struct windowsaio_data *wd;
- struct thread_ctx *ctx;
- ULONG_PTR ulKey = 0;
- DWORD bytes;
-
- ctx = (struct thread_ctx*)lpParameter;
- wd = ctx->wd;
-
- while (ctx->wd->iothread_running) {
- if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250))
- continue;
-
- fov = CONTAINING_RECORD(ovl, FIO_OVERLAPPED, o);
- io_u = fov->io_u;
-
- if (io_u->seen != 0)
- continue;
-
- if (ovl->Internal == ERROR_SUCCESS) {
- io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
- io_u->error = 0;
- } else {
- io_u->resid = io_u->xfer_buflen;
- io_u->error = ovl->Internal;
- }
-
- io_u->seen = 1;
- SetEvent(wd->iocomplete_event);
- }
-
- CloseHandle(ctx->iocp);
- SetEvent(ctx->wd->iothread_stopped);
- free(ctx);
-
- return 0;
-}
-
static int fio_windowsaio_init(struct thread_data *td)
{
struct windowsaio_data *wd;
- OSVERSIONINFO osInfo;
+ HANDLE hKernel32Dll;
int rc = 0;
+ int i;
wd = malloc(sizeof(struct windowsaio_data));
if (wd != NULL)
}
if (!rc) {
- wd->io_handles = malloc(2 * td->o.iodepth * sizeof(HANDLE));
- if (wd->io_handles == NULL)
+ wd->ovls = malloc(td->o.iodepth * sizeof(struct fio_overlapped));
+ if (wd->ovls == NULL)
rc = 1;
}
if (!rc) {
- wd->ovls = malloc(2 * td->o.iodepth * sizeof(FIO_OVERLAPPED));
- if (wd->ovls == NULL)
- rc = 1;
+ for (i = 0; i < td->o.iodepth; i++) {
+ wd->ovls[i].io_free = TRUE;
+ wd->ovls[i].io_complete = FALSE;
+
+ wd->ovls[i].o.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
+ if (wd->ovls[i].o.hEvent == NULL) {
+ rc = 1;
+ break;
+ }
+ }
}
if (!rc) {
rc = 1;
}
- if (!rc) {
- osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
- GetVersionEx(&osInfo);
-
- if (osInfo.dwMajorVersion >= 6)
- wd->have_cancelioex = TRUE;
- else
- wd->have_cancelioex = FALSE;
- }
-
if (rc) {
- PrintError(__func__);
if (wd != NULL) {
if (wd->ovls != NULL)
free(wd->ovls);
- if (wd->io_handles != NULL)
- free(wd->io_handles);
if (wd->aio_events != NULL)
free(wd->aio_events);
}
}
+ hKernel32Dll = GetModuleHandle("kernel32.dll");
+ wd->pCancelIoEx = GetProcAddress(hKernel32Dll, "CancelIoEx");
+
td->io_ops->data = wd;
- return 0;
+ return rc;
}
+static void fio_windowsaio_cleanup(struct thread_data *td)
+{
+ int i;
+ struct windowsaio_data *wd;
+
+ wd = td->io_ops->data;
+
+ if (wd != NULL) {
+ wd->iothread_running = FALSE;
+ WaitForSingleObject(wd->iothread, INFINITE);
+
+ CloseHandle(wd->iothread);
+ CloseHandle(wd->iocomplete_event);
+
+ for (i = 0; i < td->o.iodepth; i++)
+ CloseHandle(wd->ovls[i].o.hEvent);
+
+ free(wd->aio_events);
+ free(wd->ovls);
+ free(wd);
+
+ td->io_ops->data = NULL;
+ }
+}
+
+
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
{
int rc = 0;
HANDLE hFile;
- DWORD flags = FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED;
+ DWORD flags = FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED;
DWORD sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE;
DWORD openmode = OPEN_ALWAYS;
DWORD access;
- int i;
dprint(FD_FILE, "fd open %s\n", f->file_name);
if (td->o.sync_io)
flags |= FILE_FLAG_WRITE_THROUGH;
-
if (td->o.td_ddir == TD_DDIR_READ ||
- td->o.td_ddir == TD_DDIR_WRITE ||
- td->o.td_ddir == TD_DDIR_RANDRW)
- {
+ td->o.td_ddir == TD_DDIR_WRITE)
flags |= FILE_FLAG_SEQUENTIAL_SCAN;
- }
else
- {
flags |= FILE_FLAG_RANDOM_ACCESS;
- }
- if (td_read(td) || read_only)
+ if (!td_write(td) || read_only)
access = GENERIC_READ;
else
access = (GENERIC_READ | GENERIC_WRITE);
f->hFile = CreateFile(f->file_name, access, sharemode,
NULL, openmode, flags, NULL);
- if (f->hFile == INVALID_HANDLE_VALUE) {
- PrintError(__func__);
+ if (f->hFile == INVALID_HANDLE_VALUE)
rc = 1;
- }
/* Only set up the competion port and thread if we're not just
* querying the device size */
if (!rc && td->io_ops->data != NULL) {
- struct windowsaio_data *wd;
struct thread_ctx *ctx;
+ struct windowsaio_data *wd;
+
hFile = CreateIoCompletionPort(f->hFile, NULL, 0, 0);
wd = td->io_ops->data;
-
- wd->io_index = 0;
wd->iothread_running = TRUE;
- /* Create a manual-reset event */
- wd->iothread_stopped = CreateEvent(NULL, TRUE, FALSE, NULL);
-
- if (wd->iothread_stopped == NULL)
- rc = 1;
-
- if (!rc) {
- for (i = 0; i < 2 * td->o.iodepth; i++) {
- /* Create a manual-reset event for putting in OVERLAPPED */
- wd->io_handles[i] = CreateEvent(NULL, TRUE, FALSE, NULL);
- if (wd->io_handles[i] == NULL) {
- PrintError(__func__);
- rc = 1;
- break;
- }
- }
- }
if (!rc) {
ctx = malloc(sizeof(struct thread_ctx));
wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, NULL);
}
- if (rc || wd->iothread == NULL) {
- PrintError(__func__);
+ if (rc || wd->iothread == NULL)
rc = 1;
- }
}
return rc;
static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
- struct windowsaio_data *wd;
+ int rc = 0;
dprint(FD_FILE, "fd close %s\n", f->file_name);
- if (td->io_ops->data != NULL) {
- wd = td->io_ops->data;
- wd->iothread_running = FALSE;
- WaitForSingleObject(wd->iothread_stopped, INFINITE);
- }
-
if (f->hFile != INVALID_HANDLE_VALUE) {
if (!CloseHandle(f->hFile))
- PrintError(__func__);
+ rc = 1;
}
f->hFile = INVALID_HANDLE_VALUE;
+ return rc;
+}
+
+static BOOL timeout_expired(DWORD start_count, DWORD end_count)
+{
+ BOOL expired = FALSE;
+ DWORD current_time;
+
+ current_time = GetTickCount();
+
+ if ((end_count > start_count) && current_time >= end_count)
+ expired = TRUE;
+ else if (current_time < start_count && current_time > end_count)
+ expired = TRUE;
+
+ return expired;
+}
+
+static struct io_u* fio_windowsaio_event(struct thread_data *td, int event)
+{
+ struct windowsaio_data *wd = td->io_ops->data;
+ return wd->aio_events[event];
+}
+
+static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
+ unsigned int max, struct timespec *t)
+{
+ struct windowsaio_data *wd = td->io_ops->data;
+ struct flist_head *entry;
+ unsigned int dequeued = 0;
+ struct io_u *io_u;
+ struct fio_overlapped *fov;
+ DWORD start_count = 0;
+ DWORD end_count = 0;
+ DWORD status;
+ DWORD mswait = 250;
+
+ if (t != NULL) {
+ mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
+ start_count = GetTickCount();
+ end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
+ }
+
+ do {
+ flist_for_each(entry, &td->io_u_busylist) {
+ io_u = flist_entry(entry, struct io_u, list);
+ fov = (struct fio_overlapped*)io_u->engine_data;
+
+ if (fov->io_complete) {
+ fov->io_complete = FALSE;
+ fov->io_free = TRUE;
+ wd->aio_events[dequeued] = io_u;
+ dequeued++;
+ }
+
+ if (dequeued >= min)
+ break;
+ }
+
+ if (dequeued < min) {
+ status = WaitForSingleObject(wd->iocomplete_event, mswait);
+ if (status != WAIT_OBJECT_0 && dequeued > 0)
+ break;
+ }
+
+ if (dequeued >= min || (t != NULL && timeout_expired(start_count, end_count)))
+ break;
+ } while (1);
+
+ return dequeued;
+}
+
+static int fio_windowsaio_queue(struct thread_data *td, struct io_u *io_u)
+{
+ LPOVERLAPPED lpOvl = NULL;
+ struct windowsaio_data *wd;
+ DWORD iobytes;
+ BOOL success;
+ int index;
+ int rc = FIO_Q_COMPLETED;
+
+ fio_ro_check(td, io_u);
+
+ wd = td->io_ops->data;
+
+ for (index = 0; index < td->o.iodepth; index++) {
+ if (wd->ovls[index].io_free) {
+ wd->ovls[index].io_free = FALSE;
+ ResetEvent(wd->ovls[index].o.hEvent);
+ break;
+ }
+ }
+
+ assert(index < td->o.iodepth);
+
+ lpOvl = &wd->ovls[index].o;
+ wd->ovls[index].io_u = io_u;
+ lpOvl->Internal = STATUS_PENDING;
+ lpOvl->InternalHigh = 0;
+ lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
+ lpOvl->OffsetHigh = io_u->offset >> 32;
+ io_u->engine_data = &wd->ovls[index];
+
+ switch (io_u->ddir) {
+ case DDIR_WRITE:
+ success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
+ break;
+ case DDIR_READ:
+ success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
+ break;
+ case DDIR_SYNC:
+ case DDIR_DATASYNC:
+ case DDIR_SYNC_FILE_RANGE:
+ success = FlushFileBuffers(io_u->file->hFile);
+ if (!success)
+ io_u->error = GetLastError();
+
+ return FIO_Q_COMPLETED;
+ break;
+ case DDIR_TRIM:
+ log_err("manual TRIM isn't supported on Windows");
+ io_u->error = 1;
+ io_u->resid = io_u->xfer_buflen;
+ return FIO_Q_COMPLETED;
+ break;
+ default:
+ assert(0);
+ }
+
+ if (success || GetLastError() == ERROR_IO_PENDING)
+ rc = FIO_Q_QUEUED;
+ else {
+ io_u->error = GetLastError();
+ io_u->resid = io_u->xfer_buflen;
+ }
+
+ return rc;
+}
+
+/* Runs as a thread and waits for queued IO to complete */
+static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter)
+{
+ OVERLAPPED *ovl;
+ struct fio_overlapped *fov;
+ struct io_u *io_u;
+ struct windowsaio_data *wd;
+ struct thread_ctx *ctx;
+ ULONG_PTR ulKey = 0;
+ DWORD bytes;
+
+ ctx = (struct thread_ctx*)lpParameter;
+ wd = ctx->wd;
+
+ do {
+ if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250))
+ continue;
+
+ fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
+ io_u = fov->io_u;
+
+ if (ovl->Internal == ERROR_SUCCESS) {
+ io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
+ io_u->error = 0;
+ } else {
+ io_u->resid = io_u->xfer_buflen;
+ io_u->error = ovl->Internal;
+ }
+
+ fov->io_complete = TRUE;
+ SetEvent(wd->iocomplete_event);
+ } while (ctx->wd->iothread_running);
+
+ CloseHandle(ctx->iocp);
+ free(ctx);
return 0;
}
+static int fio_windowsaio_cancel(struct thread_data *td,
+ struct io_u *io_u)
+{
+ int rc = 0;
+
+ struct windowsaio_data *wd = td->io_ops->data;
+
+ /* If we're running on Vista or newer, we can cancel individual IO requests */
+ if (wd->pCancelIoEx != NULL) {
+ struct fio_overlapped *ovl = io_u->engine_data;
+
+ if (!wd->pCancelIoEx(io_u->file->hFile, &ovl->o))
+ rc = 1;
+ } else
+ rc = 1;
+
+ return rc;
+}
+
static struct ioengine_ops ioengine = {
.name = "windowsaio",
.version = FIO_IOOPS_VERSION,
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