[LTP] [PATCH 3/6] realtime: threads need not set cpu affinity while main does

[Gowrishankar <gomuthuk@linux.vnet.ibm.com>]

From: gowrishankar <gowrishankar.m@linux.vnet.ibm.com>

Since main() sets the cpu affinity, it is not necessary for the
spawned threads to do so, as the threads inherit the cpu affinity.

Signed-off-by: Gowrishankar <gowrishankar.m@in.ibm.com>
Tested-by: Gowrishankar <gowrishankar.m@in.ibm.com>
Acked-by: Darren Hart <dvhltc@us.ibm.com>
---
 testcases/realtime/func/pi-tests/testpi-1.c |   36 ++------------------------
 testcases/realtime/func/pi-tests/testpi-2.c |   36 ++------------------------
 2 files changed, 6 insertions(+), 66 deletions(-)

diff --git a/testcases/realtime/func/pi-tests/testpi-1.c b/testcases/realtime/func/pi-tests/testpi-1.c
index 35df387..25541d7 100644
--- a/testcases/realtime/func/pi-tests/testpi-1.c
+++ b/testcases/realtime/func/pi-tests/testpi-1.c
@@ -81,17 +81,7 @@ pthread_mutex_t glob_mutex;
 void *func_nonrt(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid, rc,\
-			strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Thread %d started running with priority %d\n", tid,\
 		pthr->priority);
@@ -120,17 +110,7 @@ void *func_nonrt(void *arg)
 void *func_rt(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid,\
-			rc, strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Thread %d started running with prio %d\n", tid, pthr->priority);
 	pthread_barrier_wait(&barrier);
@@ -162,17 +142,7 @@ void *func_rt(void *arg)
 void *func_noise(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid, rc,\
-			strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Noise Thread %d started running with prio %d\n", tid,
 		pthr->priority);
diff --git a/testcases/realtime/func/pi-tests/testpi-2.c b/testcases/realtime/func/pi-tests/testpi-2.c
index 00f632b..eb00129 100644
--- a/testcases/realtime/func/pi-tests/testpi-2.c
+++ b/testcases/realtime/func/pi-tests/testpi-2.c
@@ -83,17 +83,7 @@ pthread_mutex_t glob_mutex;
 void *func_lowrt(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid, rc,\
-			strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Thread %d started running with priority %d\n", tid,\
 		pthr->priority);
@@ -122,17 +112,7 @@ void *func_lowrt(void *arg)
 void *func_rt(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid,\
-			rc, strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Thread %d started running with prio %d\n", tid, pthr->priority);
 	pthread_barrier_wait(&barrier);
@@ -164,17 +144,7 @@ void *func_rt(void *arg)
 void *func_noise(void *arg)
 {
 	struct thread *pthr = (struct thread *)arg;
-	int rc, i, j, tid = gettid();
-	cpu_set_t mask;
-	CPU_ZERO(&mask);
-	CPU_SET(0, &mask);
-
-	rc = sched_setaffinity(0, sizeof(mask), &mask);
-	if (rc < 0) {
-		printf("Thread %d: Can't set affinity: %d %s\n", tid, rc,\
-			strerror(rc));
-		exit(-1);
-	}
+	int i, j, tid = gettid();
 
 	printf("Noise Thread %d started running with prio %d\n", tid,\
 		pthr->priority);
-- 
1.7.1


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