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

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

[Zhang, Xiantao]

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x86: document tsc_native configuration option in xmexample.hvm.
 
Set the default value to 1
 
Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
 
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 #2: doc-tsc-native.patch --]
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x86: document tsc_native configuration option in xmexample.hvm.

Set the default value to 1

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>

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

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