diff --git a/Makefile b/Makefile
index 3bff13d..e90255d 100644
--- a/Makefile
+++ b/Makefile
@@ -74,6 +74,8 @@ GCCV:=		$(shell (gcc -v 2>&1 | grep 'gcc version') || (apk info -a gcc 2> /dev/n
 VULN1:=		$(shell (cat /sys/devices/system/cpu/vulnerabilities/spectre_v1 2> /dev/null || printf unknown))
 VULN2:=		$(shell (cat /sys/devices/system/cpu/vulnerabilities/spectre_v2 2> /dev/null || printf unknown))
 REVISION:=	$(shell git rev-parse --short HEAD)
+CFLAGS+=	-DREVISION=\"$(REVISION)\"
+
 define BANNER
 	printf '\033[1m\033[94m________          __\n'
 	printf '\\_____  \\   _____/  |_  ____ ______  __ __  ______\n'
diff --git a/octopus.h b/octopus.h
index 1c5b43b..351e7c6 100644
--- a/octopus.h
+++ b/octopus.h
@@ -4,11 +4,40 @@
 #include <getopt.h>
 #include <string.h>
 #include <x86intrin.h>
+#include <time.h>
+#if defined(__OpenBSD__)
+	#include <sys/time.h>
+#elif defined(__linux__)
+	// From OpenBSD's src/sys/sys/time.h
+	#define	timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0
+	#define	timespecadd(tsp, usp, vsp)\
+	do {\
+		(vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec;\
+		(vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;\
+		if ((vsp)->tv_nsec >= 1000000000L) {\
+			(vsp)->tv_sec++;\
+			(vsp)->tv_nsec -= 1000000000L;\
+		}\
+	} while (0)
+	#define	timespecsub(tsp, usp, vsp)\
+	do {\
+		(vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec;\
+		(vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;\
+		if ((vsp)->tv_nsec < 0) {\
+			(vsp)->tv_sec--;\
+			(vsp)->tv_nsec += 1000000000L;\
+		}\
+	} while (0)
+#endif
 
-#if defined(__i386__) || defined(__amd64__)
+#if defined(__amd64__)
         #define CACHELINE_SIZE	64
 #else
-        #error "unsupported architecture"
+        #error "Unsupported architecture. amd64 is required."
+#endif
+
+#if !defined(__SSE__)
+	#error "Unsupported platform. SSE is required."
 #endif
 
 #if defined(__SSE__) && !defined(__SSE2__)
@@ -18,6 +47,7 @@
 	#define LATENCY 18 + 18
 #endif 
 
+
 #ifndef NORDTSCP
 	#define LATENCY 42 + 42
 #else
@@ -26,7 +56,12 @@
 	#endif
 #endif
 
-#if OCTOPUS_STRAIN == V1
+#ifndef REVISION
+	#define REVISION "unknown"
+#endif
+
+#if OCTOPUS_STRAIN == 1
+	#define CVE "CVE-2017-5753"
 	#ifdef MASKING_MITIGATION
 		/* From https://github.com/torvalds/linux/blob/cb6416592bc2a8b731dabcec0d63cda270764fc6/arch/x86/include/asm/barrier.h#L27 
 		 *
@@ -71,10 +106,11 @@
 					_mm_stderr_ps(&p[(l * 4 + k) * 4], i);
 		}
 	#endif //NOCLFLUSH
-#endif // OCTOPUS_STRAIN V1
+#endif // OCTOPUS_STRAIN 1
 
-#if OCTOPUS_STRAIN == V2
-#endif // OCTOPUS_STRAIN V2
+#if OCTOPUS_STRAIN == 2
+	#define CVE "CVE-2017-5715"
+#endif // OCTOPUS_STRAIN 2
 
 #define GAP 512
 
@@ -82,6 +118,7 @@ char* 		secret = "SPECTRE: Special Executive for Counterintelligence, Terrorism,
 unsigned int 	cache_hit_threshold, array1_size = 16;
 uint8_t 	unused1[64], unused2[64], array1[160] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
 uint8_t 	channel[256 * GAP]; // side channel to extract secret phrase
+struct timespec	total_cpu_time, cpu_time, cpu_start, cpu_end;
 
 #define __OCTOPUS_ARGS__\
 	while ((o = getopt(argc, argv, "t:j")) != EOF) {\
@@ -199,7 +236,7 @@ octopus_calibrate_threshold(unsigned int *threshold)
 }
 
 void
-octopus_to_json(char** argv, int successes) {
+octopus_to_json(char** argv, int successes, struct timespec* total_cpu_time) {
 	printf("{ \"%s\": { \"capacities\": { ",argv[0] + 2);
 	#ifndef NORDTSCP
 		printf("\"rdtscp\": true, ");
@@ -216,8 +253,8 @@ octopus_to_json(char** argv, int successes) {
 	#else
 		printf("\"clflush\": false ");
 	#endif 
-	#if OCTOPUS_STRAIN == V1
-			printf("}, \"mitigations\": { ");
+	#if OCTOPUS_STRAIN == 1
+		printf("}, \"mitigations\": { ");
 		#ifdef LFENCE_MITIGATION
 			printf("\"lfence\": true, ");
 		#else
@@ -228,14 +265,21 @@ octopus_to_json(char** argv, int successes) {
 		#else
 			printf("\"masking\": false ");
 		#endif
-	#endif // OCTOPUS_STRAIN == V1
+	#endif // OCTOPUS_STRAIN == 1
 	printf("}, ");
+	printf("\"revision\": \"%s\", ", REVISION);
+	printf("\"cpu_time\": %lld.%09ld, ", (long long)total_cpu_time->tv_sec, total_cpu_time->tv_nsec);
 	printf("\"threshold\": %d, ", cache_hit_threshold);
 	printf("\"success\": %.0f } }", 100 * successes / (float)strlen(secret));
 }
 
 void
-octopus_result_line(char** argv, int successes) {
+octopus_header_line(char** argv, char* secret) {
+	fprintf(stderr, "[+] %s rev %s leaking %d bytes with %s:\n[?] ", argv[0] + 2, REVISION, (int)strlen(secret), CVE);
+}
+
+void
+octopus_result_line(char** argv, int successes, struct timespec* total_cpu_time) {
 	fprintf(stderr, "[+] %-27s\t",argv[0] + 2);
 	#ifndef NORDTSCP
 		fprintf(stderr, "RDTSCP ");
@@ -248,13 +292,14 @@ octopus_result_line(char** argv, int successes) {
 	#ifndef NOCLFLUSH
 		fprintf(stderr, "CLFLUSH ");
 	#endif 
-	#if OCTOPUS_STRAIN == V1
+	#if OCTOPUS_STRAIN == 1
 		#ifdef LFENCE_MITIGATION
 			fprintf(stderr, "LFENCE_MITIGATION ");
 		#endif
 		#ifdef MASKING_MITIGATION
 			fprintf(stderr, "MASKING_MITIGATION ");
 		#endif
-	#endif // OCTOPUS_STRAIN == V1
-	fprintf(stderr, "\tthreshold %-3d\tsuccess %3.0f %%\n", cache_hit_threshold, 100 * successes / (float)strlen(secret));
+	#endif // OCTOPUS_STRAIN == 1
+	fprintf(stderr, "\tcpu_time %lld.%09ld s\tthreshold %-3d\tsuccess %3.0f %%\n",
+		(long long)total_cpu_time->tv_sec, total_cpu_time->tv_nsec, cache_hit_threshold, 100 * successes / (float)strlen(secret));
 }
diff --git a/spectre_v1.c b/spectre_v1.c
index 481f82f..58d1008 100644
--- a/spectre_v1.c
+++ b/spectre_v1.c
@@ -19,7 +19,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define OCTOPUS_STRAIN V1
+#define OCTOPUS_STRAIN 1
 #include "octopus.h"
 
 uint8_t		temp = 0; /* Used so compiler won’t optimize out victim_function() */
@@ -116,7 +116,7 @@ main(int argc, char** argv)
 	
 	__OCTOPUS_ARGS__
 
-	fprintf(stderr, "[+] %s leaking %d bytes with CVE-2017-5753:\n[?] ", argv[0] + 2, (int)strlen(secret));
+	octopus_header_line(argv, secret);
 	octopus_calibrate_threshold(cache_hit_threshold ? NULL : &cache_hit_threshold);
 	#ifdef NOCLFLUSH
 		for (i = 0; i < (int)sizeof(cache_flush_array); i++) {
@@ -126,8 +126,18 @@ main(int argc, char** argv)
 	for (i = 0; i < (int)sizeof(channel); i++) {
 		channel[i] = 1; /* write to channel so in RAM not copy-on-write zero pages */
 	}
+
+	timespecclear(&total_cpu_time);
+
 	while (--len >= 0) {
+		clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &cpu_start);
+		
 		leak(malicious_x++, value, score, cache_hit_threshold);
+		
+		clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &cpu_end);
+		timespecsub(&cpu_end, &cpu_start, &cpu_time);
+		timespecadd(&cpu_time, &total_cpu_time, &total_cpu_time);
+		
 		if(score[0] == 3 && value[0] > 31 && value[0] < 127) {
 			successes++;
 			fprintf(stderr, "\033[32m%c\033[0m", (value[0]));
@@ -136,10 +146,11 @@ main(int argc, char** argv)
 		}
 	}
 	fprintf(stderr, "\n");
+
 	if (json) {
-		octopus_to_json(argv, successes);
+		octopus_to_json(argv, successes, &total_cpu_time);
 	}
-	octopus_result_line(argv, successes);
+	octopus_result_line(argv, successes, &total_cpu_time);
 	
 	return 0;
 }
diff --git a/spectre_v2.c b/spectre_v2.c
index 823b03b..d38a468 100644
--- a/spectre_v2.c
+++ b/spectre_v2.c
@@ -18,7 +18,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#define OCTOPUS_STRAIN V2
+#define OCTOPUS_STRAIN 2
 #include "octopus.h"
 
 uint64_t*	target; // pointer to indirect call target
@@ -150,15 +150,25 @@ main(int argc, char** argv)
 	__OCTOPUS_ARGS__
 	
 	target = (uint64_t*)malloc(sizeof(uint64_t));
-	fprintf(stderr, "[+] %s leaking %d bytes with CVE-2017-5715:\n[?] ", argv[0] + 2, len);
+	octopus_header_line(argv, secret);
 	octopus_calibrate_threshold(cache_hit_threshold ? NULL : &cache_hit_threshold);
 	#ifdef NOCLFLUSH
 		for (i = 0; i < (int)sizeof(cache_flush_array); i++) {
 			cache_flush_array[i] = 1;
 		}
 	#endif
+
+	timespecclear(&total_cpu_time);
+
 	while (--len >= 0) {
+		clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &cpu_start);
+
 		leak(secret_addr++, value, score, cache_hit_threshold);
+		
+		clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &cpu_end);
+		timespecsub(&cpu_end, &cpu_start, &cpu_time);
+		timespecadd(&cpu_time, &total_cpu_time, &total_cpu_time);
+
 		if(score[0] == 3 && value[0] > 31 && value[0] < 127) {
 			successes++;
 			fprintf(stderr, "\033[32m%c\033[0m", (value[0]));
@@ -168,9 +178,9 @@ main(int argc, char** argv)
 	}
 	fprintf(stderr, "\n");
 	if (json) {
-		octopus_to_json(argv, successes);
+		octopus_to_json(argv, successes, &total_cpu_time);
 	}
-	octopus_result_line(argv, successes);
+	octopus_result_line(argv, successes, &total_cpu_time);
 	
 	free(target);