Date: Mon, 28 Mar 2005 10:45:17 -0500 From: em1897@aol.com To: freebsd-questions@freebsd.org Subject: Re: hyper threading. Message-ID: <8C701C4461F7B6C-4B8-3F640@mblk-d50.sysops.aol.com> In-Reply-To: <1732642559.20050328060300@wanadoo.fr> References: <c6ef380c050326061976f164b@mail.gmail.com> <1641928994.20050326192811@wanadoo.fr> <8C700529A2DFD74-A44-3A157@mblk-d34.sysops.aol.com> <439876144.20050326220638@wanadoo.fr> <8C7006AE7E80573-FAC-3B652@mblk-r28.sysops.aol.com> <49251524.20050326234521@wanadoo.fr> <8C7007D5D4D30D2-A38-3B313@mblk-r33.sysops.aol.com> <14510304120.20050327123336@wanadoo.fr> <8C700FCB91B8886-4B8-3C2BE@mblk-d50.sysops.aol.com> <170873865.20050327200416@wanadoo.fr> <8C7015DFC50E71C-B30-24D33@mblk-d12.sysops.aol.com> <1732642559.20050328060300@wanadoo.fr>
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I guess that depends on how you define "performance". The MAX_INTS setting in the em driver essentially does what polling does (in reducing interrupts) without the overhead. So there is really no way that polling could be better. With polling you have a lot of unnecessary overhead. Setting MAX_INTS properly has zero overhead for the O/S -----Original Message----- From: Anthony Atkielski <atkielski.anthony@wanadoo.fr> To: freebsd-questions@freebsd.org Sent: Mon, 28 Mar 2005 06:03:00 +0200 Subject: Re: hyper threading. em1897@aol.com writes: > Polling is simply unecessary in most cases. You could get > better performance using an em driver and setting max > ints to whatever is optimal for your system. Polling adds > latency and over head for no good reason. Polling often provides better performance, at the expense of higher overhead. -- Anthony _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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