Re: FIO 2.0.9 for Windows Server 2008 RC1 SP2 reports extreme latencies

[Bruce Cran <bruce@cran.org.uk>]

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On 10/10/2012 11:07, Bruce Cran wrote:
> The problem is that windowsaio iterates over the list of outstanding 
> IOs (busylist), but that list has the most recent first.

The attached patch appears to fix the problem:

Add outstanding IOs to the tail of io_u_busylist, not the head.

-- 
Bruce Cran

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diff --git a/io_u.c b/io_u.c
index a2c583d..e047677 100644
--- a/io_u.c
+++ b/io_u.c
@@ -1096,7 +1096,7 @@ again:
 
 		io_u->error = 0;
 		flist_del(&io_u->list);
-		flist_add(&io_u->list, &td->io_u_busylist);
+		flist_add_tail(&io_u->list, &td->io_u_busylist);
 		td->cur_depth++;
 		io_u->flags |= IO_U_F_IN_CUR_DEPTH;
 	} else if (td->o.verify_async) {