Date: Mon, 12 Mar 2001 21:36:49 +0200 From: Mark Murray <mark@grondar.za> To: Matt Dillon <dillon@earth.backplane.com> Cc: Bruce Evans <bde@zeta.org.au>, Maxim Sobolev <sobomax@FreeBSD.ORG>, current@FreeBSD.ORG Subject: Re: Ethernet entropy harvesting seriously pessimizes performance Message-ID: <200103121935.f2CJZpf91381@gratis.grondar.za> In-Reply-To: <200103121911.f2CJB8o71169@earth.backplane.com> ; from Matt Dillon <dillon@earth.backplane.com> "Mon, 12 Mar 2001 11:11:08 PST." References: <200103121911.f2CJB8o71169@earth.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> Please try this patch. This should solve all the random harvesting
> performance issues no matter how efficient or inefficient the hash
> function (untested as I do not have a -current box at the moment).
Erm, you are behind :-)
I have already committed something that does this in a much more
configurable way.
M
> -Matt
>
> Index: yarrow.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/dev/random/yarrow.c,v
> retrieving revision 1.31
> diff -u -r1.31 yarrow.c
> --- yarrow.c 2001/02/11 16:21:35 1.31
> +++ yarrow.c 2001/03/12 19:09:15
> @@ -104,11 +104,8 @@
>
> for (;;) {
>
> - if (harvestring.tail == harvestring.head)
> - tsleep(&harvestring, PUSER, "rndslp", hz/10);
> -
> - else {
> -
> + tsleep(&harvestring, PUSER, "rndslp", hz/10);
> + if (harvestring.tail != harvestring.head) {
> /* Suck the harvested entropy out of the queue and hash
> * it into the appropriate pool.
> */
>
--
Mark Murray
Warning: this .sig is umop ap!sdn
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200103121935.f2CJZpf91381>