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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: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Anton Blanchard <anton@samba.org>
This commit is contained in:
Michael Ellerman 2015-12-02 20:44:10 +11:00
parent 00b7ec5c9c
commit ea0c321784
2 changed files with 24 additions and 9 deletions
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1
tools/testing/selftests/powerpc/benchmarks/Makefile
View File

@ -6,6 +6,7 @@ all: $(TEST_PROGS)
$(TEST_PROGS): ../harness.c
context_switch: ../utils.c
context_switch: LDLIBS += -lpthread
include ../../lib.mk

32
tools/testing/selftests/powerpc/benchmarks/context_switch.c
View File

@ -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);