[Xen-devel] [PATCH 1 of 2] xen, tracing: Make a new hardware-related trace class

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

Power management seems a very narrow focus for its own class, of
which we have a limited number due to the layout of the trace
records.  Make a hardware-event trace class, and move power management
events into a subclass of those.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

diff -r 33717472f37e -r 9744f91e8c0c xen/include/public/trace.h
--- a/xen/include/public/trace.h        Tue Jun 28 18:15:44 2011 +0100
+++ b/xen/include/public/trace.h        Thu Jun 30 10:32:12 2011 +0100
@@ -38,7 +38,7 @@
 #define TRC_MEM      0x0010f000    /* Xen memory trace         */
 #define TRC_PV       0x0020f000    /* Xen PV traces            */
 #define TRC_SHADOW   0x0040f000    /* Xen shadow tracing       */
-#define TRC_PM       0x0080f000    /* Xen power management trace */
+#define TRC_HW       0x0080f000    /* Xen hardware-related traces */
 #define TRC_GUEST    0x0800f000    /* Guest-generated traces   */
 #define TRC_ALL      0x0ffff000
 #define TRC_HD_TO_EVENT(x) ((x)&0x0fffffff)
@@ -57,6 +57,9 @@
 #define TRC_SCHED_CLASS     0x00022000   /* Scheduler-specific    */
 #define TRC_SCHED_VERBOSE   0x00028000   /* More inclusive scheduling */
 
+/* Trace classes for Hardware */
+#define TRC_HW_PM           0x00801000   /* Power management traces */
+
 /* Trace events per class */
 #define TRC_LOST_RECORDS        (TRC_GEN + 1)
 #define TRC_TRACE_WRAP_BUFFER  (TRC_GEN + 2)
@@ -165,14 +168,10 @@
 #define TRC_HVM_IOPORT_WRITE    (TRC_HVM_HANDLER + 0x216)
 #define TRC_HVM_IOMEM_WRITE     (TRC_HVM_HANDLER + 0x217)
 
-/* trace subclasses for power management */
-#define TRC_PM_FREQ     0x00801000      /* xen cpu freq events */
-#define TRC_PM_IDLE     0x00802000      /* xen cpu idle events */
-
 /* trace events for per class */
-#define TRC_PM_FREQ_CHANGE      (TRC_PM_FREQ + 0x01)
-#define TRC_PM_IDLE_ENTRY       (TRC_PM_IDLE + 0x01)
-#define TRC_PM_IDLE_EXIT        (TRC_PM_IDLE + 0x02)
+#define TRC_PM_FREQ_CHANGE      (TRC_HW_PM + 0x01)
+#define TRC_PM_IDLE_ENTRY       (TRC_HW_PM + 0x02)
+#define TRC_PM_IDLE_EXIT        (TRC_HW_PM + 0x03)
 
 /* This structure represents a single trace buffer record. */
 struct t_rec {

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