1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
$NetBSD: patch-al,v 1.4 2005/03/03 11:54:31 garbled Exp $
--- src/bw_pipe.c.orig 1997-06-26 17:34:33.000000000 -0700
+++ src/bw_pipe.c 2005-03-03 01:31:48.000000000 -0700
@@ -134,7 +134,7 @@
}
/* Amount to transfer */
- todo = XFERUNIT * num_iter;
+ todo = XFERUNIT * num_iter + bufsize;
/* Allocate buffer */
buf = (char *) malloc(bufsize);
@@ -147,6 +147,8 @@
/* Spawn off a writer, then time the read */
switch (fork()) {
case 0: /* writer */
+ close(pipes[0]);
+
while ((done < todo) &&
((n = write(pipes[1], buf, bufsize)) > 0))
done += n;
@@ -159,8 +161,13 @@
/*NOTREACHED*/
default: /* reader */
+ close(pipes[1]);
+
/* wait for writer */
- sleep(1);
+ while ((done < bufsize) &&
+ ((n = read(pipes[0], buf, bufsize - done)) > 0))
+ done += n;
+
start(); /* start timing */
while ((done < todo) &&
@@ -168,6 +175,7 @@
done += n;
*t = stop(); /* stop timing */
+ close(pipes[0]);
wait(&termstat); /* wait for writer to exit */
}
|
