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From: Mark Murray <markm@FreeBSD.org>
Date: Sat, 2 Dec 2000 10:40:17 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/dev/random yarrow.c yarrow.h
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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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