The profile utility can set the sprofiling mode

- profile --nmi | --rtc sets the profiling mode

- --rtc is default, uses BIOS RTC, cannot profile kernel the presetted
  frequency values apply

- --nmi is only available in APIC mode as it uses the NMI watchdog, -f
  allows any frequency in Hz

- both modes use compatible data structures

lib/libc/other/_sprofile.c

@@ -2,13 +2,19 @@
 
 #define sprofile _sprofile
 
-PUBLIC int sprofile(int action, int size, int freq, char *ctl_ptr, int *mem_ptr)
+PUBLIC int sprofile(int action,
+		int size,
+		int freq,
+		int type,
+		char *ctl_ptr,
+		int *mem_ptr)
 {
   message m;
 
   m.PROF_ACTION         = action;
   m.PROF_MEM_SIZE       = size;
   m.PROF_FREQ           = freq;
+  m.PROF_INTR_TYPE      = type;
   m.PROF_CTL_PTR        = (void *) ctl_ptr;
   m.PROF_MEM_PTR        = (void *) mem_ptr;
 

lib/libsys/sys_sprof.c

@@ -5,10 +5,11 @@
 /*===========================================================================*
  *                                sys_sprof				     *
  *===========================================================================*/
-PUBLIC int sys_sprof(action, size, freq, endpt, ctl_ptr, mem_ptr)
+PUBLIC int sys_sprof(action, size, freq, type, endpt, ctl_ptr, mem_ptr)
 int action; 				/* start/stop profiling */
 int size;				/* available profiling memory */
 int freq;				/* sample frequency */
+int type;
 endpoint_t endpt;			/* caller endpoint */
 void *ctl_ptr;				/* location of info struct */
 void *mem_ptr;				/* location of profiling memory */
@@ -18,6 +19,7 @@ void *mem_ptr;				/* location of profiling memory */
   m.PROF_ACTION         = action;
   m.PROF_MEM_SIZE       = size;
   m.PROF_FREQ           = freq;
+  m.PROF_INTR_TYPE      = type;
   m.PROF_ENDPT		= endpt;
   m.PROF_CTL_PTR        = ctl_ptr;
   m.PROF_MEM_PTR        = mem_ptr;