Date: Mon, 4 Sep 2006 10:43:12 +0200 From: m.ehinger@ltur.de To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-hackers@freebsd.org Subject: Re: dev vs. sysctl Message-ID: <OF7D027A05.7456D463-ONC12571DF.002EFB0C-C12571DF.002FD6A8@gateway-inter.net> In-Reply-To: <20060903.100108.-108810397.imp@bsdimp.com>
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"M. Warner Losh" <imp@bsdimp.com> schrieb am 03.09.2006 18:01:08: > In the past I did some silly measurements and found that sysctls were > slower by a small amount. I never could figure out why, since the > path to the sysctl seemed like it would be shorter than the path to > the read. This was in the 3.x timeframe, so your best bet is to code > up both and see which one is better today. OK i did that and it seems to be still the same. "read" seems to be faster then th sysctl call. I got about 8.7 seconds for 100,000 sysctl reads and 1.8 seconds for 100,000 read calls. Measured on a Thinkpad with 75MHz CPU frequency. Thanks Maik
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