context_switch_latency: Improve diagnostics

1 files changed, 6 insertions, 5 deletions

diff --git a/context_switch_latency.c b/context_switch_latency.c
index fe39a7a..4b8989c 100644
--- a/context_switch_latency.c
+++ b/context_switch_latency.c
@@ -8,6 +8,7 @@
 #include <sched.h>
 #include <pthread.h>
 #include <sys/eventfd.h>
+#include <err.h>
 
 int to_thread, from_thread;
 volatile int state;  // 0 = warmup.  1 = benchmark.  2 = exit.
@@ -34,7 +35,7 @@ void *threadproc(void *x)
       uint64_t buf;
 
       if (read(to_thread, &buf, 8) != 8)
-	abort();
+	err(1, "read eventfd");
 
       int s = state;
       if (s == 2)
@@ -44,7 +45,7 @@ void *threadproc(void *x)
 
       buf = 1;
       if (write(from_thread, &buf, 8) != 8)
-	abort();
+	err(1, "write eventfd");
     }
 }
 
@@ -52,10 +53,10 @@ void bounce()
 {
   uint64_t buf = 1;
   if (write(to_thread, &buf, 8) != 8)
-    abort();
+    err(1, "write eventfd");
   
   if (read(from_thread, &buf, 8) != 8)
-    abort();
+    err(1, "read eventfd");
 }
 
 void killit()
@@ -63,7 +64,7 @@ void killit()
   uint64_t buf = 1;
   state = 2;
   if (write(to_thread, &buf, 8) != 8)
-    abort();
+    err(1, "write eventfd at exit");
 }
 
 int main(int argc, char **argv)