From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Sandeen Date: Thu, 26 Jul 2007 05:14:20 +0000 Subject: Re: [lm-sensors] dme1737 very slow read... Message-Id: <46A82DAC.5070609@sandeen.net> List-Id: References: <46A8157E.7040003@sandeen.net> In-Reply-To: <46A8157E.7040003@sandeen.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lm-sensors@vger.kernel.org Juerg Haefliger wrote: > Hi Eric, > > >> I was very happy to see dme1737 support added, thank you! Now I can get >> all the info out of my compaq sr1710nx cheapo server. :) > > Glad you like it :-) I can finally tell my wife that the time I spent > on the driver wasn't all wasted... I'm impressed; I tried to dislodge a data sheet for this chip from SMSC, with no luck. They don't want us to know our cpu temps it seems! ;-) >> 1.53 seconds to read "0\n" ! :) >> >> Any idea if this is a hardware or software delay? I haven't yet dug >> into profiling the kernel code to see what might be taking so long... > > It's simple: We have to read a lot of registers which we can only get > to via I2C which is veeerrrrryyyyy sloooooowwwwww. Ok, I thought it might be along those lines. Is there any other performance impact to the system while it's waiting for the I2C bus? Thanks, -Eric _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors