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Protect shared affinity table with mutex
[userspace-rcu.git]
/
test_qsbr.c
diff --git
a/test_qsbr.c
b/test_qsbr.c
index af5ccfd58317d06d5c1e2d6c37ac0f268b0c5e16..2617629743e15a80b77da08b33de7cc7206e25f0 100644
(file)
--- a/
test_qsbr.c
+++ b/
test_qsbr.c
@@
-92,22
+92,33
@@
static unsigned int cpu_affinities[NR_CPUS];
static unsigned int next_aff = 0;
static int use_affinity = 0;
static unsigned int next_aff = 0;
static int use_affinity = 0;
+pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
+
static void set_affinity(void)
{
cpu_set_t mask;
int cpu;
static void set_affinity(void)
{
cpu_set_t mask;
int cpu;
+ int ret;
if (!use_affinity)
return;
if (!use_affinity)
return;
+ ret = pthread_mutex_lock(&affinity_mutex);
+ if (ret) {
+ perror("Error in pthread mutex lock");
+ exit(-1);
+ }
cpu = cpu_affinities[next_aff++];
cpu = cpu_affinities[next_aff++];
+ ret = pthread_mutex_unlock(&affinity_mutex);
+ if (ret) {
+ perror("Error in pthread mutex unlock");
+ exit(-1);
+ }
CPU_ZERO(&mask);
CPU_SET(cpu, &mask);
sched_setaffinity(0, sizeof(mask), &mask);
}
CPU_ZERO(&mask);
CPU_SET(cpu, &mask);
sched_setaffinity(0, sizeof(mask), &mask);
}
-
-
/*
* returns 0 if test should end.
*/
/*
* returns 0 if test should end.
*/
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