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[Xen-devel] [PATCH]x86: document tsc_native configuration option in xmexample.hvm.


  • To: "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
  • From: "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>
  • Date: Fri, 16 Oct 2009 09:50:01 +0800
  • Accept-language: en-US
  • Acceptlanguage: en-US
  • Cc:
  • Delivery-date: Thu, 15 Oct 2009 18:51:35 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcpOAvmnk3qbvV1gT/a+hUvZZ+RA8Q==
  • Thread-topic: [PATCH]x86: document tsc_native configuration option in xmexample.hvm.

x86: document tsc_native configuration option in xmexample.hvm.
 
Set the default value to 1
 
Signed-off-by: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
 
diff -r 18758847bf31 tools/examples/xmexample.hvm
--- a/tools/examples/xmexample.hvm Wed Oct 14 09:09:23 2009 +0100
+++ b/tools/examples/xmexample.hvm Fri Oct 16 09:42:14 2009 +0800
@@ -177,6 +177,12 @@ stdvga=0
 #   then xm console or minicom can connect
 serial='pty'
 
+#----------------------------------------------------------------------------
+#   tsc_native : TSC mode (0=emulate TSC, 1=native TSC)
+#   emulate TSC provides synced TSC for all vcpus, but lose perfomrance.
+#   native TSC leverages hardware's TSC(no perf loss), but vcpu's TSC may lose
+#   sync due to hardware's unreliable/unsynced TSC between CPUs.
+tsc_native=1
 
 #-----------------------------------------------------------------------------
 #   Qemu Monitor, default is disable

Attachment: doc-tsc-native.patch
Description: doc-tsc-native.patch

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