add other architecture fallback

timestamp.c

@@ -1,6 +1,8 @@
 #include <stdint.h>
+#ifdef __amd64__
 #include <immintrin.h>
 #include <x86intrin.h>
+#endif
 #include <errno.h>
 #include <sys/sysctl.h>
 
@@ -19,6 +21,7 @@ tsc2ns(uint64_t tsc, uint64_t tsc_freq)
 int
 topo_ts_init(struct topo_desc * desc, int verbose)
 {
+#ifdef __amd64__
     int rc;
 
     size_t sz = sizeof(desc->tsc_freq);
@@ -33,14 +36,23 @@ topo_ts_init(struct topo_desc * desc, int verbose)
 	}
 
     return rc;
+#else
+	return 0;
+#endif
 }
 
 uint64_t
 topo_desc_uptime_ns(struct topo_desc * desc)
 {
+#ifdef __amd64__
 	unsigned int dummy;
 	_mm_lfence();
 	uint64_t tsc = __rdtscp(&dummy);
 	_mm_lfence();
 	return tsc2ns(tsc, desc->tsc_freq);
+#else
+	struct timespec tp;
+	clock_gettime(CLOCK_MONOTONIC, &tp);
+    return ((uint64_t)tp.tv_sec * S2NS + (uint64_t)tp.tv_nsec);
+#endif
 }