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Commit ea0c3217 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Make context_switch do something with no args 



For ease of use make the context_switch test do something useful when
called with no arguments.

Default to a 30 second run, using threads, doing yield, and use any
online cpu. Make it print out what it's doing to avoid confusion.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Acked-by: default avatarAnton Blanchard <anton@samba.org>
parent 00b7ec5c

tools/testing/selftests/powerpc/benchmarks/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ all: $(TEST_PROGS) 


$(TEST_PROGS): ../harness.c



context_switch: ../utils.c

context_switch: LDLIBS += -lpthread



include ../../lib.mk

tools/testing/selftests/powerpc/benchmarks/context_switch.c

+23 −9
Original line number Diff line number Diff line
@@ -26,7 +26,9 @@ 
#include <sys/shm.h>

#include <linux/futex.h>



static unsigned int timeout = INT_MAX;

#include "../utils.h"



static unsigned int timeout = 30;



static int touch_vdso;

struct timeval tv;
@@ -363,9 +365,9 @@ static struct option options[] = { 
static void usage(void)

{

	fprintf(stderr, "Usage: context_switch2 <options> CPU1 CPU2\n\n");

	fprintf(stderr, "\t\t--test=X\tpipe, futex or yield\n");

	fprintf(stderr, "\t\t--test=X\tpipe, futex or yield (default)\n");

	fprintf(stderr, "\t\t--process\tUse processes (default threads)\n");

	fprintf(stderr, "\t\t--timeout=X\tDuration in seconds to run\n");

	fprintf(stderr, "\t\t--timeout=X\tDuration in seconds to run (default 30)\n");

	fprintf(stderr, "\t\t--vdso\t\ttouch VDSO\n");

	fprintf(stderr, "\t\t--fp\t\ttouch FP\n");

#ifdef __powerpc__
@@ -377,7 +379,7 @@ static void usage(void) 
int main(int argc, char *argv[])

{

	signed char c;

	struct actions *actions = &pipe_actions;

	struct actions *actions = &yield_actions;

	int cpu1;

	int cpu2;

	static void (*start_fn)(void *(*fn)(void *), void *arg, unsigned long cpu);
@@ -428,18 +430,30 @@ int main(int argc, char *argv[]) 
		start_fn = start_thread_on;



	if (((argc - optind) != 2)) {

		usage();

		exit(1);

		cpu1 = cpu2 = pick_online_cpu();

	} else {

		cpu1 = atoi(argv[optind++]);

		cpu2 = atoi(argv[optind++]);

	}



	printf("Using %s with ", processes ? "processes" : "threads");



	if (actions == &pipe_actions)

		printf("pipe");

	else if (actions == &yield_actions)

		printf("yield");

	else

		printf("futex");



	printf(" on cpus %d/%d touching FP:%s altivec:%s vector:%s vdso:%s\n",

	       cpu1, cpu2, touch_fp ?  "yes" : "no", touch_altivec ? "yes" : "no",

	       touch_vector ? "yes" : "no", touch_vdso ? "yes" : "no");



	/* Create a new process group so we can signal everyone for exit */

	setpgid(getpid(), getpid());



	signal(SIGUSR1, sigusr1_handler);



	cpu1 = atoi(argv[optind++]);

	cpu2 = atoi(argv[optind++]);



	actions->setup(cpu1, cpu2);



	start_fn(actions->thread1, NULL, cpu1);