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Increase the size of the pipe buffer as denoted by PIPSIZ from

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4k to 8k.  This has a significant effect on the pipe performance.  In
the future it might be good to increase this to 16k.  PIPSIZ is now
tunable for experimentation.
This commit is contained in:
dyson 1995-08-31 01:39:31 +00:00
parent 9660571b5f
commit a752352fe7
1 changed files with 4 additions and 2 deletions

6
sys/kern/uipc_usrreq.c

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* From: @(#)uipc_usrreq.c 8.3 (Berkeley) 1/4/94
* $Id: uipc_usrreq.c,v 1.10 1995/08/08 02:22:16 davidg Exp $
* $Id: uipc_usrreq.c,v 1.11 1995/08/16 16:13:27 bde Exp $
*/
#include <sys/param.h>
@ -333,7 +333,9 @@ release:
* and don't really want to reserve the sendspace. Their recvspace should
* be large enough for at least one max-size datagram plus address.
*/
#define PIPSIZ 4096
#ifndef PIPSIZ
#define PIPSIZ 8192
#endif
u_long unpst_sendspace = PIPSIZ;
u_long unpst_recvspace = PIPSIZ;
u_long unpdg_sendspace = 2*1024; /* really max datagram size */