Re: [RFT] kvm with Windows optimization

[Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>]

[-- Attachment #1: Type: text/plain, Size: 953 bytes --]

Avi Kivity wrote:
> This is a request for testing of an experimental kvm feature that 
> dramatically accelerates some Windows releases (when running with the 
> ACPI HAL, and especially with guest SMP).  The feature detects accesses 
> by the guest to the Task Priority Register (TPR) and patches them at 
> runtime to a kvm-friendly code snipped that is provided by the BIOS.
>
> The upshot of all that is that 
> http://kvm.qumranet.com/kvmwiki/Windows_ACPI_Workaround is no longer 
> required, and Windows SMP no longer runs like a dog; it's quite snappy 
> from my very limited testing.
>
> Please download the test release from 
> http://people.qumranet.com/avi/tpr-opt-1.tar.gz and give it a spin.  
> Once it has received some exposure, I'll merge it into mainline.
>
> Credit for the original idea is due to Ben Serebrin.
>
>   

Sweet!

I needed the following patch to compile.  Will let you know how testing 
goes.

Regards,

Anthony Liguori

[-- Attachment #2: tpr-opt-1-compile.diff --]
[-- Type: text/x-patch, Size: 487 bytes --]

diff -ur a/qemu/qemu-kvm.h b/qemu/qemu-kvm.h
--- a/qemu/qemu-kvm.h	2007-10-25 11:55:25.000000000 -0500
+++ b/qemu/qemu-kvm.h	2007-10-25 12:48:38.000000000 -0500
@@ -30,7 +30,6 @@
 
 #define ALIGN(x, y)  (((x)+(y)-1) & ~((y)-1))
 #define BITMAP_SIZE(m) (ALIGN(((m)>>TARGET_PAGE_BITS), HOST_LONG_BITS) / 8)
-#endif
 
 extern int kvm_tpr_log_enabled;
 void kvm_do_log_tpr(int write);
@@ -42,3 +41,4 @@
     if (kvm_tpr_log_enabled && addr == 0xfee00080)
 	kvm_do_log_tpr(write);
 }
+#endif

[-- Attachment #3: Type: text/plain, Size: 314 bytes --]

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/

[-- Attachment #4: Type: text/plain, Size: 186 bytes --]

_______________________________________________
kvm-devel mailing list
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
https://lists.sourceforge.net/lists/listinfo/kvm-devel