Date: Sat, 2 Dec 2000 10:40:17 -0800 (PST) From: Mark Murray <markm@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/random yarrow.c yarrow.h Message-ID: <200012021840.eB2IeHq86973@freefall.freebsd.org>
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markm 2000/12/02 10:40:17 PST
Modified files:
sys/dev/random yarrow.c yarrow.h
Log:
Major speedup to /dev/random and the kernel thread that reseeds it.
There is no more TAILQ fifo to harvest the entropy; instead, there
is a circular buffer of constant size (changeable by macro) that
pretty dramatically improves the speed and fixes potential slowdowns-
by-locking.
Also gone are a slew of malloc(9) and free(9) calls; all harvesting
buffers are static.
All-in-all, this is a good performance improvement.
Thanks-to: msmith for the circular buffer concept-code.
Revision Changes Path
1.26 +107 -97 src/sys/dev/random/yarrow.c
1.13 +2 -2 src/sys/dev/random/yarrow.h
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