}
}
+static int windowsaio_invalidate_cache(struct fio_file *f)
+{
+ DWORD error;
+ DWORD isharemode = (FILE_SHARE_DELETE | FILE_SHARE_READ |
+ FILE_SHARE_WRITE);
+ HANDLE ihFile;
+ int rc = 0;
+
+ /*
+ * Encourage Windows to drop cached parts of a file by temporarily
+ * opening it for non-buffered access. Note: this will only work when
+ * the following is the only thing with the file open on the whole
+ * system.
+ */
+ dprint(FD_IO, "windowaio: attempt invalidate cache for %s\n",
+ f->file_name);
+ ihFile = CreateFile(f->file_name, 0, isharemode, NULL, OPEN_EXISTING,
+ FILE_FLAG_NO_BUFFERING, NULL);
+
+ if (ihFile != INVALID_HANDLE_VALUE) {
+ if (!CloseHandle(ihFile)) {
+ error = GetLastError();
+ log_info("windowsaio: invalidation fd close %s "
+ "failed: error %d\n", f->file_name, error);
+ rc = 1;
+ }
+ } else {
+ error = GetLastError();
+ if (error != ERROR_FILE_NOT_FOUND) {
+ log_info("windowsaio: cache invalidation of %s failed: "
+ "error %d\n", f->file_name, error);
+ rc = 1;
+ }
+ }
+
+ return rc;
+}
+
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
{
int rc = 0;
/*
* Inform Windows whether we're going to be doing sequential or
- * random io so it can tune the Cache Manager
+ * 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
+ switch (td->o.fadvise_hint) {
+ case F_ADV_TYPE:
+ if (td_random(td))
+ flags |= FILE_FLAG_RANDOM_ACCESS;
+ else
+ flags |= FILE_FLAG_SEQUENTIAL_SCAN;
+ break;
+ case F_ADV_RANDOM:
flags |= FILE_FLAG_RANDOM_ACCESS;
+ break;
+ case F_ADV_SEQUENTIAL:
+ flags |= FILE_FLAG_SEQUENTIAL_SCAN;
+ break;
+ case F_ADV_NONE:
+ break;
+ default:
+ log_err("fio: unknown fadvise type %d\n", td->o.fadvise_hint);
+ }
if (!td_write(td) || read_only)
access = GENERIC_READ;
else
openmode = OPEN_EXISTING;
+ /* If we're going to use direct I/O, Windows will try and invalidate
+ * its cache at that point so there's no need to do it here */
+ if (td->o.invalidate_cache && !td->o.odirect)
+ windowsaio_invalidate_cache(f);
+
f->hFile = CreateFile(f->file_name, access, sharemode,
NULL, openmode, flags, NULL);