/*
* Native Windows async IO engine
- * Copyright (C) 2011 Bruce Cran <bruce@cran.org.uk>
+ * Copyright (C) 2012 Bruce Cran <bruce@cran.org.uk>
*/
#include <stdio.h>
typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped);
-typedef struct {
- OVERLAPPED o;
- struct io_u *io_u;
-} FIO_OVERLAPPED;
+struct fio_overlapped {
+ OVERLAPPED o;
+ struct io_u *io_u;
+ BOOL io_complete;
+ BOOL io_free;
+};
struct windowsaio_data {
- HANDLE *io_handles;
- unsigned int io_index;
- FIO_OVERLAPPED *ovls;
-
- HANDLE iothread;
- HANDLE iothread_stopped;
- BOOL iothread_running;
-
+ struct fio_overlapped *ovls;
struct io_u **aio_events;
+ HANDLE iothread;
HANDLE iocomplete_event;
CANCELIOEX pCancelIoEx;
- BOOL useIOCP;
+ 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);
return -1;
}
-static void PrintError(LPCSTR lpszFunction)
+static int fio_windowsaio_init(struct thread_data *td)
{
- // 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);
+ struct windowsaio_data *wd;
+ HANDLE hKernel32Dll;
+ int rc = 0;
+ int i;
+
+ wd = malloc(sizeof(struct windowsaio_data));
+ if (wd != NULL)
+ ZeroMemory(wd, sizeof(struct windowsaio_data));
+ else
+ rc = 1;
+
+ if (!rc) {
+ wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*));
+ if (wd->aio_events == NULL)
+ rc = 1;
+ }
+
+ if (!rc) {
+ wd->ovls = malloc(td->o.iodepth * sizeof(struct fio_overlapped));
+ if (wd->ovls == NULL)
+ rc = 1;
+ }
+
+ if (!rc) {
+ 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) {
+ /* Create an auto-reset event */
+ wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL);
+ if (wd->iocomplete_event == NULL)
+ rc = 1;
+ }
+
+ if (rc) {
+ if (wd != NULL) {
+ if (wd->ovls != NULL)
+ free(wd->ovls);
+ if (wd->aio_events != NULL)
+ free(wd->aio_events);
+
+ free(wd);
+ }
+ }
+
+ hKernel32Dll = GetModuleHandle("kernel32.dll");
+ wd->pCancelIoEx = (CANCELIOEX)GetProcAddress(hKernel32Dll, "CancelIoEx");
+ td->io_ops->data = wd;
+
+ return rc;
}
-static int fio_windowsaio_cancel(struct thread_data *td,
- struct io_u *io_u)
+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_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED;
+ DWORD sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE;
+ DWORD openmode = OPEN_ALWAYS;
+ DWORD access;
- struct windowsaio_data *wd = td->io_ops->data;
+ dprint(FD_FILE, "fd open %s\n", f->file_name);
- /* If we're running on Vista or newer, we can cancel individual IO requests */
- if (wd->pCancelIoEx != NULL) {
- FIO_OVERLAPPED *ovl = io_u->engine_data;
- if (!wd->pCancelIoEx(io_u->file->hFile, &ovl->o))
- rc = 1;
- } else
+ if (f->filetype == FIO_TYPE_PIPE) {
+ log_err("fio: windowsaio doesn't support pipes\n");
+ return 1;
+ }
+
+ if (!strcmp(f->file_name, "-")) {
+ log_err("fio: can't read/write to stdin/out\n");
+ return 1;
+ }
+
+ if (td->o.odirect)
+ flags |= FILE_FLAG_NO_BUFFERING;
+ if (td->o.sync_io)
+ flags |= FILE_FLAG_WRITE_THROUGH;
+
+ /*
+ * Inform Windows whether we're going to be doing sequential or
+ * random io so it can tune the Cache Manager
+ */
+ if (td->o.td_ddir == TD_DDIR_READ ||
+ td->o.td_ddir == TD_DDIR_WRITE)
+ flags |= FILE_FLAG_SEQUENTIAL_SCAN;
+ else
+ flags |= FILE_FLAG_RANDOM_ACCESS;
+
+ if (!td_write(td) || read_only)
+ access = GENERIC_READ;
+ else
+ access = (GENERIC_READ | GENERIC_WRITE);
+
+ if (td->o.create_on_open)
+ openmode = OPEN_ALWAYS;
+ else
+ openmode = OPEN_EXISTING;
+
+ f->hFile = CreateFile(f->file_name, access, sharemode,
+ NULL, openmode, flags, NULL);
+
+ if (f->hFile == INVALID_HANDLE_VALUE)
rc = 1;
+ /* Only set up the completion port and thread if we're not just
+ * querying the device size */
+ if (!rc && td->io_ops->data != NULL) {
+ struct thread_ctx *ctx;
+ struct windowsaio_data *wd;
+
+ hFile = CreateIoCompletionPort(f->hFile, NULL, 0, 0);
+
+ wd = td->io_ops->data;
+ wd->iothread_running = TRUE;
+
+ if (!rc) {
+ ctx = malloc(sizeof(struct thread_ctx));
+ ctx->iocp = hFile;
+ ctx->wd = wd;
+
+ wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, NULL);
+ }
+
+ 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)
+{
+ int rc = 0;
+
+ dprint(FD_FILE, "fd close %s\n", f->file_name);
+
+ if (f->hFile != INVALID_HANDLE_VALUE) {
+ if (!CloseHandle(f->hFile))
+ rc = 1;
+ }
+
+ f->hFile = INVALID_HANDLE_VALUE;
return rc;
}
-static BOOL TimedOut(DWORD start_count, DWORD end_count)
+static BOOL timeout_expired(DWORD start_count, DWORD end_count)
{
BOOL expired = FALSE;
DWORD current_time;
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 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;
+ 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);
end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
}
- while (dequeued < min && !timedout) {
+ 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 (io_u->seen == 0) {
- io_u->seen = 1;
+ if (fov->io_complete) {
+ fov->io_complete = FALSE;
+ fov->io_free = TRUE;
wd->aio_events[dequeued] = io_u;
dequeued++;
}
- if (dequeued == max)
+ if (dequeued >= min)
break;
}
- if (dequeued < min)
- WaitForSingleObject(wd->iocomplete_event, mswait);
+ if (dequeued < min) {
+ status = WaitForSingleObject(wd->iocomplete_event, mswait);
+ if (status != WAIT_OBJECT_0 && dequeued > 0)
+ break;
+ }
- if (t != NULL && TimedOut(start_count, end_count))
- timedout = TRUE;
- }
+ if (dequeued >= min || (t != NULL && timeout_expired(start_count, end_count)))
+ break;
+ } while (1);
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)
+static int fio_windowsaio_queue(struct thread_data *td, struct io_u *io_u)
{
+ LPOVERLAPPED lpOvl = NULL;
struct windowsaio_data *wd;
- LPOVERLAPPED lpOvl;
DWORD iobytes;
- BOOL success = TRUE;
- int ind;
- int rc;
+ BOOL success = FALSE;
+ int index;
+ int rc = FIO_Q_COMPLETED;
fio_ro_check(td, io_u);
wd = td->io_ops->data;
- ind = wd->io_index;
-
- ResetEvent(wd->io_handles[ind]);
- if (wd->useIOCP) {
- lpOvl = &wd->ovls[ind].o;
+ 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;
+ }
+ }
- lpOvl->Internal = STATUS_PENDING;
- lpOvl->InternalHigh = 0;
- lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
- lpOvl->OffsetHigh = io_u->offset >> 32;
- lpOvl->hEvent = wd->io_handles[ind];
- lpOvl->Pointer = NULL;
- wd->ovls[ind].io_u = io_u;
- } else {
- lpOvl = NULL;
- }
+ assert(index < td->o.iodepth);
- io_u->engine_data = &wd->ovls[ind];
- io_u->seen = 0;
+ 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];
- if (io_u->ddir == DDIR_WRITE) {
+ switch (io_u->ddir) {
+ case DDIR_WRITE:
success = WriteFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
- } else if (io_u->ddir == DDIR_READ) {
+ break;
+ case DDIR_READ:
success = ReadFile(io_u->file->hFile, io_u->xfer_buf, io_u->xfer_buflen, &iobytes, lpOvl);
- } else if (io_u->ddir == DDIR_SYNC ||
- io_u->ddir == DDIR_DATASYNC ||
- io_u->ddir == DDIR_SYNC_FILE_RANGE)
- {
- FlushFileBuffers(io_u->file->hFile);
+ 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;
- } else if (io_u->ddir == DDIR_TRIM) {
- log_info("Manual TRIM isn't supported on Windows");
+ 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;
- } else
+ break;
+ default:
assert(0);
+ break;
+ }
- if (wd->useIOCP && (success || GetLastError() == ERROR_IO_PENDING)) {
- wd->io_index = (wd->io_index + 1) % td->o.iodepth;
+ if (success || GetLastError() == ERROR_IO_PENDING)
rc = FIO_Q_QUEUED;
- } else if (success && !wd->useIOCP) {
- io_u->resid = io_u->xfer_buflen - iobytes;
- io_u->error = 0;
- rc = FIO_Q_COMPLETED;
- } else {
- PrintError(__func__);
+ else {
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 < 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 fio_overlapped *fov;
struct io_u *io_u;
struct windowsaio_data *wd;
struct thread_ctx *ctx;
if (!GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey, &ovl, 250))
continue;
- fov = CONTAINING_RECORD(ovl, FIO_OVERLAPPED, o);
+ fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
io_u = fov->io_u;
if (ovl->Internal == ERROR_SUCCESS) {
io_u->error = ovl->Internal;
}
+ fov->io_complete = TRUE;
SetEvent(wd->iocomplete_event);
} while (ctx->wd->iothread_running);
CloseHandle(ctx->iocp);
- SetEvent(ctx->wd->iothread_stopped);
free(ctx);
-
return 0;
}
-static int fio_windowsaio_init(struct thread_data *td)
+static int fio_windowsaio_cancel(struct thread_data *td,
+ struct io_u *io_u)
{
- struct windowsaio_data *wd;
- HANDLE hKernel32Dll;
int rc = 0;
- wd = malloc(sizeof(struct windowsaio_data));
- if (wd != NULL)
- ZeroMemory(wd, sizeof(struct windowsaio_data));
- else
- rc = 1;
-
- if (!rc) {
- wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*));
- if (wd->aio_events == NULL)
- rc = 1;
- }
-
- if (!rc) {
- wd->io_handles = malloc(td->o.iodepth * sizeof(HANDLE));
- if (wd->io_handles == NULL)
- rc = 1;
- }
+ struct windowsaio_data *wd = td->io_ops->data;
- if (!rc) {
- wd->ovls = malloc(td->o.iodepth * sizeof(FIO_OVERLAPPED));
- if (wd->ovls == NULL)
- rc = 1;
- }
+ /* 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 (!rc) {
- /* Create an auto-reset event */
- wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL);
- if (wd->iocomplete_event == NULL)
+ if (!wd->pCancelIoEx(io_u->file->hFile, &ovl->o))
rc = 1;
- }
-
- 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);
-
- free(wd);
- }
- }
-
- hKernel32Dll = GetModuleHandle("kernel32.dll");
- wd->pCancelIoEx = GetProcAddress(hKernel32Dll, "CancelIoEx");
-
- td->io_ops->data = wd;
- return 0;
-}
-
-static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
-{
- int rc = 0;
- HANDLE hFile;
- DWORD flags = FILE_FLAG_POSIX_SEMANTICS;
- 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 (f->filetype == FIO_TYPE_PIPE) {
- log_err("fio: windowsaio doesn't support pipes\n");
- return 1;
- }
-
- if (!strcmp(f->file_name, "-")) {
- log_err("fio: can't read/write to stdin/out\n");
- return 1;
- }
-
- if (!td->o.odirect && !td->o.sync_io && td->io_ops->data != NULL)
- flags |= FILE_FLAG_OVERLAPPED;
-
- if (td->o.odirect)
- flags |= FILE_FLAG_NO_BUFFERING;
- 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)
- flags |= FILE_FLAG_SEQUENTIAL_SCAN;
- else
- flags |= FILE_FLAG_RANDOM_ACCESS;
-
- if (!td_write(td) || read_only)
- access = GENERIC_READ;
- else
- access = (GENERIC_READ | GENERIC_WRITE);
-
- if (td->o.create_on_open > 0)
- openmode = OPEN_ALWAYS;
- else
- openmode = OPEN_EXISTING;
-
- f->hFile = CreateFile(f->file_name, access, sharemode,
- NULL, openmode, flags, NULL);
-
- if (f->hFile == INVALID_HANDLE_VALUE) {
- PrintError(__func__);
+ } else
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 && !td->o.odirect && !td->o.sync_io) {
- struct thread_ctx *ctx;
- struct windowsaio_data *wd;
- hFile = CreateIoCompletionPort(f->hFile, NULL, 0, 0);
-
-
- wd = td->io_ops->data;
-
- if (!td->o.odirect && !td->o.sync_io)
- wd->useIOCP = 1;
- else
- wd->useIOCP = 0;
-
- 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 < 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));
- ctx->iocp = hFile;
- ctx->wd = wd;
-
- wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, NULL);
- }
-
- if (rc || wd->iothread == NULL) {
- PrintError(__func__);
- rc = 1;
- }
- }
return rc;
}
-static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f)
-{
- struct windowsaio_data *wd;
-
- 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__);
- }
-
- f->hFile = INVALID_HANDLE_VALUE;
- return 0;
-}
-
static struct ioengine_ops ioengine = {
.name = "windowsaio",
.version = FIO_IOOPS_VERSION,