diff options
| author | dyson <dyson@FreeBSD.org> | 1996-07-13 22:52:50 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1996-07-13 22:52:50 +0000 |
| commit | 49cbb2bcfc3ba7cf6685fc91c0bced5bb2ce69e8 (patch) | |
| tree | 2371ac9cf5eef8135b704b3a7940c15d7e3fd87e /sys/sys/pipe.h | |
| parent | dd36926d570838b0f4086a79308586ddc87eeda9 (diff) | |
| download | FreeBSD-src-49cbb2bcfc3ba7cf6685fc91c0bced5bb2ce69e8.zip FreeBSD-src-49cbb2bcfc3ba7cf6685fc91c0bced5bb2ce69e8.tar.gz | |
A few minor mods (improvements) to support more efficient pipe
operations for large transfers. There are essentially no differences
for small transfers, but big transfers should perform about 20%
better.
Diffstat (limited to 'sys/sys/pipe.h')
| -rw-r--r-- | sys/sys/pipe.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/sys/sys/pipe.h b/sys/sys/pipe.h index a7e83ff..764f1f7 100644 --- a/sys/sys/pipe.h +++ b/sys/sys/pipe.h @@ -18,7 +18,7 @@ * 5. Modifications may be freely made to this file if the above conditions * are met. * - * $Id: pipe.h,v 1.4 1996/05/01 04:18:20 bde Exp $ + * $Id: pipe.h,v 1.5 1996/07/12 05:44:30 bde Exp $ */ #ifndef _SYS_PIPE_H_ @@ -40,6 +40,10 @@ #define PIPE_SIZE 16384 #endif +#ifndef BIG_PIPE_SIZE +#define BIG_PIPE_SIZE (64*1024) +#endif + /* * PIPE_MINDIRECT MUST be smaller than PIPE_SIZE and MUST be bigger * than PIPE_BUF. @@ -48,7 +52,7 @@ #define PIPE_MINDIRECT 8192 #endif -#define PIPENPAGES (PIPE_SIZE / PAGE_SIZE + 1) +#define PIPENPAGES (BIG_PIPE_SIZE / PAGE_SIZE + 1) /* * Pipe buffer information. |
