Date: Sun, 03 Sep 2006 10:01:08 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: m.ehinger@ltur.de Cc: freebsd-hackers@freebsd.org Subject: Re: dev vs. sysctl Message-ID: <20060903.100108.-108810397.imp@bsdimp.com> In-Reply-To: <OFF6ACECFA.EDBF24DA-ONC12571D8.0021A7A1-C12571D8.00222060@gateway-inter.net> References: <OFF6ACECFA.EDBF24DA-ONC12571D8.0021A7A1-C12571D8.00222060@gateway-inter.net>
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In message: <OFF6ACECFA.EDBF24DA-ONC12571D8.0021A7A1-C12571D8.00222060@gateway-inter.net> m.ehinger@ltur.de writes: : i just want to know which one is faster? Which has the lowest overhead? : : I want to return 8 bytes (tow integer values) of data about 50 times a second. 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. Warner
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