X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=test_perthreadlock.c;h=3fc4a537f89c98f9556fe706ddb9eb65b85da675;hb=ec3aaabbc4b507388502ee760e4ecf3ce5894176;hp=7d722314bb91c3a7c6899efa3aac5dcd2ea3fd8c;hpb=9e31d0f0084e781405056c347aa4a8c53f676096;p=urcu.git

diff --git a/test_perthreadlock.c b/test_perthreadlock.c
index 7d72231..3fc4a53 100644
--- a/test_perthreadlock.c
+++ b/test_perthreadlock.c
@@ -35,6 +35,9 @@
 
 #include "arch.h"
 
+/* Make this big enough to include the POWER5+ L3 cacheline size of 256B */
+#define CACHE_LINE_SIZE 4096
+
 #if defined(_syscall0)
 _syscall0(pid_t, gettid)
 #elif defined(__NR_gettid)
@@ -63,7 +66,7 @@ struct test_array {
 
 struct per_thread_lock {
 	pthread_mutex_t lock;
-} __attribute__((aligned(128)));	/* cache-line aligned */
+} __attribute__((aligned(CACHE_LINE_SIZE)));	/* cache-line aligned */
 
 static struct per_thread_lock *per_thread_lock;
 
@@ -108,8 +111,10 @@ static int test_duration_read(void)
 static unsigned long long __thread nr_writes;
 static unsigned long long __thread nr_reads;
 
-static unsigned long long __attribute__((aligned(128))) *tot_nr_writes;
-static unsigned long long __attribute__((aligned(128))) *tot_nr_reads;
+static
+unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_writes;
+static
+unsigned long long __attribute__((aligned(CACHE_LINE_SIZE))) *tot_nr_reads;
 
 static unsigned int nr_readers;
 static unsigned int nr_writers;
@@ -185,7 +190,7 @@ void *thr_writer(void *data)
 		}
 		test_array.a = 0;
 		test_array.a = 8;
-		for (tidx = nr_readers - 1; tidx >= 0; tidx--) {
+		for (tidx = (long)nr_readers - 1; tidx >= 0; tidx--) {
 			pthread_mutex_unlock(&per_thread_lock[tidx].lock);
 		}
 		nr_writes++;