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[Xen-ia64-devel] [PATCH 0/3][IA64] Accelerate IDE PIO on HVM/IA64
| To: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxx> |
|---|---|
| Subject: | [Xen-ia64-devel] [PATCH 0/3][IA64] Accelerate IDE PIO on HVM/IA64 |
| From: | Kouya SHIMURA <kouya@xxxxxxxxxxxxxx> |
| Date: | Tue, 27 Feb 2007 18:34:29 +0900 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 27 Feb 2007 01:33:46 -0800 |
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| Sender: | xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx |
Hi, This set of patches remarkably accelerates IDE PIO on HVM/IA64. I got a throughput of 2.11MB/sec in disk read performance. Without it, it was only 64kB/sec. I posted the prototype once. http://lists.xensource.com/archives/html/xen-devel/2006-12/msg00077.html The basic idea is to add a buffering mechanism in a hypervisor. I know this approach is not sophisticated. But there is no other good way in IA64 which has no string instructions like x86's. This patchset is indispensable to support windows/ia64 on HVM since installing windows and crash dumping is terribly slow. There is no effect on x86 side. Please apply to xen-unstable/3.0.5. Thanks, Kouya _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel |
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