From d1f700355630c2d6e22ebff9de5f15b10aa14185 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 10 Dec 2010 20:52:04 -0800
Subject: sort: comment fix

* src/sort.c: Comment fix re spin locks.
---
 src/sort.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/sort.c b/src/sort.c
index 9cfc8144f..36e3b19fb 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -3149,10 +3149,7 @@ compare_nodes (void const *a, void const *b)
   return nodea->level < nodeb->level;
 }
 
-/* Lock a merge tree NODE.
-   Spin locks were seen to perform better than mutexes when the number
-   of threads is limited to the number of processors, assuming 'sort'
-   never waits when writing to stdout.  */
+/* Lock a merge tree NODE.  */
 
 static inline void
 lock_node (struct merge_node *node)
@@ -4567,8 +4564,6 @@ main (int argc, char **argv)
     }
   else
     {
-      /* If NTHREADS > number of cores on the machine, spinlocking
-         could be wasteful.  */
       unsigned long int np2 = num_processors (NPROC_CURRENT_OVERRIDABLE);
       if (!nthreads || nthreads > np2)
         nthreads = np2;
-- 
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