Date: Sun, 4 Feb 1996 11:56:37 -0800 (PST) From: John Dyson <dyson> To: CVS-committers, cvs-sys Subject: cvs commit: src/sys/kern kern_descrip.c sys_pipe.c Message-ID: <199602041956.LAA29135@freefall.freebsd.org>
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dyson 96/02/04 11:56:36
Modified: sys/sys pipe.h
sys/kern kern_descrip.c sys_pipe.c
Log:
Improve the performance for pipe(2) again. Also include some
fixes for previous version of new pipes from Bruce Evans. This
new version:
Supports more properly the semantics of select (BDE).
Supports "OLD_PIPE" correctly (kern_descrip.c, BDE).
Eliminates incorrect EPIPE returns (bash 'pipe broken' messages.)
Much faster yet, currently tuned relatively conservatively -- but now
gives approx 50% more perf than the new pipes code did originally.
(That was about 50% more perf than the original BSD pipe code.)
Known bugs outstanding:
No support for async io (SIGIO). Will be included soon.
Next to do:
Merge support for FIFOs.
Submitted by: bde
Revision Changes Path
1.3 +36 -1 src/sys/sys/pipe.h
1.25 +7 -1 src/sys/kern/kern_descrip.c
1.5 +442 -46 src/sys/kern/sys_pipe.c
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