Arun Sharma
2005-Aug-11 19:25 UTC
[Xen-devel] [PATCH][VT][13/15] Implement event filtering command line options for xentrace.
Implement event filtering command line options for xentrace.
Signed-off-by: Edwin Zhai <edwin.zhai@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
diff -r 455dff354413 -r bbb21d688c7f tools/xentrace/xentrace.c
--- a/tools/xentrace/xentrace.c Tue Aug 9 19:12:44 2005
+++ b/tools/xentrace/xentrace.c Tue Aug 9 19:12:48 2005
@@ -45,6 +45,8 @@
char *outfile;
struct timespec poll_sleep;
unsigned long new_data_thresh;
+ u32 evt_mask;
+ u32 cpu_mask;
} settings_t;
settings_t opts;
@@ -160,6 +162,41 @@
return tbufs_mapped;
}
+/**
+ * set_mask - set the cpu/event mask in HV
+ * @mask: the new mask
+ * @type: the new mask type,0-event mask, 1-cpu mask
+ *
+ */
+void set_mask(u32 mask, int type)
+{
+ int ret;
+ dom0_op_t op; /* dom0 op we''ll build
*/
+ int xc_handle = xc_interface_open(); /* for accessing control interface */
+
+ op.cmd = DOM0_TBUFCONTROL;
+ op.interface_version = DOM0_INTERFACE_VERSION;
+ if (type == 1) { /* cpu mask */
+ op.u.tbufcontrol.op = DOM0_TBUF_SET_CPU_MASK;
+ op.u.tbufcontrol.cpu_mask = mask;
+ fprintf(stderr, "change cpumask to 0x%x\n", mask);
+ }else if (type == 0) { /* event mask */
+ op.u.tbufcontrol.op = DOM0_TBUF_SET_EVT_MASK;
+ op.u.tbufcontrol.evt_mask = mask;
+ fprintf(stderr, "change evtmask to 0x%x\n", mask);
+ }
+
+ ret = do_dom0_op(xc_handle, &op);
+
+ xc_interface_close(xc_handle);
+
+ if ( ret != 0 )
+ {
+ PERROR("Failure to get trace buffer pointer from Xen and set the
new mask");
+ exit(EXIT_FAILURE);
+ }
+
+}
/**
* init_bufs_ptrs - initialises an array of pointers to the trace buffers
@@ -341,6 +378,31 @@
* Various declarations / definitions GNU argp needs to do its work
*****************************************************************************/
+int parse_evtmask(char *arg, struct argp_state *state)
+{
+ settings_t *setup = (settings_t *)state->input;
+ char *inval;
+
+ /* search filtering class */
+ if (strcmp(arg, "gen") == 0){
+ setup->evt_mask |= TRC_GEN;
+ } else if(strcmp(arg, "sched") == 0){
+ setup->evt_mask |= TRC_SCHED;
+ } else if(strcmp(arg, "dom0op") == 0){
+ setup->evt_mask |= TRC_DOM0OP;
+ } else if(strcmp(arg, "vmx") == 0){
+ setup->evt_mask |= TRC_VMX;
+ } else if(strcmp(arg, "all") == 0){
+ setup->evt_mask |= TRC_ALL;
+ } else {
+ setup->evt_mask = strtol(arg, &inval, 0);
+ if ( inval == arg )
+ argp_usage(state);
+ }
+
+ return 0;
+
+}
/* command parser for GNU argp - see GNU docs for more info */
error_t cmd_parser(int key, char *arg, struct argp_state *state)
@@ -366,6 +428,21 @@
argp_usage(state);
}
break;
+
+ case ''c'': /* set new cpu mask for filtering*/
+ {
+ char *inval;
+ setup->cpu_mask = strtol(arg, &inval, 0);
+ if ( inval == arg )
+ argp_usage(state);
+ }
+ break;
+
+ case ''e'': /* set new event mask for filtering*/
+ {
+ parse_evtmask(arg, state);
+ }
+ break;
case ARGP_KEY_ARG:
{
@@ -397,6 +474,14 @@
.doc =
"Set sleep time, p, in milliseconds between polling the trace buffer
"
"for new data (default " xstr(POLL_SLEEP_MILLIS) ")."
},
+
+ { .name = "cpu-mask", .key=''c'',
.arg="c",
+ .doc =
+ "set cpu-mask " },
+
+ { .name = "evt-mask", .key=''e'',
.arg="e",
+ .doc =
+ "set evt-mask " },
{0}
};
@@ -430,8 +515,18 @@
opts.outfile = 0;
opts.poll_sleep = millis_to_timespec(POLL_SLEEP_MILLIS);
opts.new_data_thresh = NEW_DATA_THRESH;
+ opts.evt_mask = 0;
+ opts.cpu_mask = 0;
argp_parse(&parser_def, argc, argv, 0, 0, &opts);
+
+ if (opts.evt_mask != 0) {
+ set_mask(opts.evt_mask, 0);
+ }
+
+ if (opts.cpu_mask != 0) {
+ set_mask(opts.evt_mask, 1);
+ }
if ( opts.outfile )
outfd = open(opts.outfile, O_WRONLY | O_CREAT);
diff -r 455dff354413 -r bbb21d688c7f xen/include/public/trace.h
--- a/xen/include/public/trace.h Tue Aug 9 19:12:44 2005
+++ b/xen/include/public/trace.h Tue Aug 9 19:12:48 2005
@@ -9,11 +9,21 @@
#define __XEN_PUBLIC_TRACE_H__
/* Trace classes */
-#define TRC_GEN 0x00010000 /* General trace */
-#define TRC_SCHED 0x00020000 /* Xen Scheduler trace */
-#define TRC_DOM0OP 0x00040000 /* Xen DOM0 operation trace */
-#define TRC_VMX 0x00080000 /* Xen VMX trace */
-#define TRC_ALL 0xffff0000
+#define TRC_CLS_SHIFT 16
+#define TRC_GEN 0x0001f000 /* General trace */
+#define TRC_SCHED 0x0002f000 /* Xen Scheduler trace */
+#define TRC_DOM0OP 0x0004f000 /* Xen DOM0 operation trace */
+#define TRC_VMX 0x0008f000 /* Xen VMX trace */
+#define TRC_ALL 0xfffff000
+
+/* Trace subclasses */
+#define TRC_SUBCLS_SHIFT 12
+/* trace subclasses for VMX */
+#define TRC_VMXEXIT 0x00081000 /* VMX exit trace */
+#define TRC_VMXTIMER 0x00082000 /* VMX timer trace */
+#define TRC_VMXINT 0x00084000 /* VMX interrupt trace */
+#define TRC_VMXIO 0x00088000 /* VMX io emulation trace */
+
/* Trace events per class */
@@ -31,9 +41,13 @@
#define TRC_SCHED_T_TIMER_FN (TRC_SCHED + 12)
#define TRC_SCHED_DOM_TIMER_FN (TRC_SCHED + 13)
-#define TRC_VMX_VMEXIT (TRC_VMX + 1)
-#define TRC_VMX_VECTOR (TRC_VMX + 2)
-#define TRC_VMX_INT (TRC_VMX + 3)
+/* trace events per subclass */
+#define TRC_VMX_VMEXIT (TRC_VMXEXIT + 1)
+#define TRC_VMX_VECTOR (TRC_VMXEXIT + 2)
+
+#define TRC_VMX_TIMER_INTR (TRC_VMXTIMER + 1)
+
+#define TRC_VMX_INT (TRC_VMXINT + 1)
/* This structure represents a single trace buffer record. */
struct t_rec {
diff -r 455dff354413 -r bbb21d688c7f xen/include/xen/trace.h
--- a/xen/include/xen/trace.h Tue Aug 9 19:12:44 2005
+++ b/xen/include/xen/trace.h Tue Aug 9 19:12:48 2005
@@ -67,6 +67,15 @@
if ( (tb_event_mask & event) == 0 )
return 0;
+ /* match class */
+ if ( ((tb_event_mask >> TRC_CLS_SHIFT) & (event >>
TRC_CLS_SHIFT)) == 0 )
+ return 0;
+
+ /* then match subclass */
+ if ( (((tb_event_mask >> TRC_SUBCLS_SHIFT) & 0xf )
+ & ((event >> TRC_SUBCLS_SHIFT) & 0xf )) == 0 )
+ return 0;
+
if ( (tb_cpu_mask & (1UL << smp_processor_id())) == 0 )
return 0;
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