Only calculate MHz on the first cpu, unless --all-cpus is passed.

3 files changed, 21 insertions, 0 deletions

diff --git a/bench/MHz.c b/bench/MHz.c
index baf5215..53c11f1 100644
--- a/bench/MHz.c
+++ b/bench/MHz.c
@@ -28,6 +28,13 @@ void estimate_MHz(struct cpudata *cpu)
 	unsigned int eax, ebx, ecx, edx;
 	unsigned long r;
 
+	if (cpu->number != 0) {
+		if (all_cpus == 0) {
+			cpu->MHz = firstcpu->MHz;
+			return;
+		}
+	}
+
 	/* Make sure we have a TSC (and hence RDTSC) */
 	cpuid(cpu->number, 1, &eax, &ebx, &ecx, &edx);
 	if ((edx & (1<<4)) == 0) {
diff --git a/x86info.c b/x86info.c
index 8b913bd..b2f469e 100644
--- a/x86info.c
+++ b/x86info.c
@@ -32,6 +32,8 @@ static int show_mptable=0;
 static int show_flags=0;
 static int show_MHz=0;
 
+unsigned int all_cpus = 0;
+
 static int num_sockets = 0;
 
 int debug = 0;
@@ -44,10 +46,13 @@ static int need_root = 0;
 unsigned int nrCPUs=1;
 static unsigned int nrSMPCPUs;
 
+struct cpudata *firstcpu;
+
 static void usage (char *programname)
 {
 	printf("Usage: %s [<switches>]\n\
 -a,   --all\n\
+      --all-cpus\n\
       --bench\n\
       --bios\n\
       --bugs\n\
@@ -95,6 +100,9 @@ static void parse_command_line (int argc, char **argv)
 			need_root = 1;
 		}
 
+		if (!strcmp(arg, "--all-cpus"))
+			all_cpus = 1;
+
 		if (!strcmp(arg, "--bench"))
 			show_bench = 1;
 
@@ -269,6 +277,8 @@ int main (int argc, char **argv)
 			printf("Out of memory\n");
 			goto out;
 		}
+		if (!firstcpu)
+			firstcpu = cpu;
 
 		memset(cpu, 0, sizeof(struct cpudata));
 
diff --git a/x86info.h b/x86info.h
index 3f0a52f..4fea275 100644
--- a/x86info.h
+++ b/x86info.h
@@ -185,6 +185,10 @@ extern int show_urls;
 
 extern unsigned int nrCPUs;
 
+extern unsigned int all_cpus;
+
+extern struct cpudata *firstcpu;
+
 extern int used_UP;
 extern int silent;
 extern int user_is_root;