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Re: [Xen-devel] no cycles for certain xentrace entries
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | Re: [Xen-devel] no cycles for certain xentrace entries |
| From: | Olaf Hering <olaf@xxxxxxxxx> |
| Date: | Wed, 29 Sep 2010 10:09:29 +0200 |
| Delivery-date: | Wed, 29 Sep 2010 01:10:34 -0700 |
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On Tue, Aug 31, Olaf Hering wrote:
> what is the reason for the empty tsc for some xentracing calls, like
> TRC_HVM_IOPORT_READ?
> It makes sorting the resulting logfile by tsc value difficult because
> the 0 entries end up at the beginning of the logfile.
This change appears to work for me.
So, what is the reason for the cycles parameter to trace_var()?
--- xen-4.0.1-testing.orig/xen/common/trace.c
+++ xen-4.0.1-testing/xen/common/trace.c
@@ -631,6 +631,7 @@ void __trace_var(u32 event, bool_t cycle
if( !tb_init_done )
return;
+ cycles = 1;
/* Convert byte count into word count, rounding up */
extra_word = (extra / sizeof(u32));
if ( (extra % sizeof(u32)) != 0 )
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