Dear R-developers, the following may seem a weird question for R-devel I try anyway, because it does seem to be related to usage of R and R's way of interacting with the hardware.
When running R (2.4.0) on my new dual core Windows XP system (Intel Core 2 Duo E6600, Mainboard ASUS P5B, BeQuiet Power Unit), I observe various types of sounds (not related to fans) when running at full usage of at least one of the cores. The most annoying sound a high-pitched noise like a whine I have so far observed running simulations in R only and couldnt reproduce with any other software (sometimes its also more a rustle than a whine, that one is not disturbing). I can clearly track it down to particular instances of R as soon as I left-click on a blue window bar in the affected R-Gui, the noise stops (and there are sometimes other instances of R running in parallel which are completely unrelated to the whine). Ive also stopped R when the computer just whined and started SAS, fully using the CPU as well no whine. Shut down SAS, restart R à whine again. Apparently, it can also be related to what exactly R is doing at the particular moment. For example, I just discovered that simulations of one type were finished, because the computer running another simulation under full load on R in a quiet way started whining at the moment it switched to the new type of simulation. The hardware technician Ive asked about this issue does not have any idea and suspects R to do something peculiar that causes the noise. Its not the mainboards fault (that has already been changed for another reason, and the behavior remains). I cant definitely locate the source of the sound. I suspect that its the Power Unit, but there are so many parts close together that I am not really sure. I do not know enough about interactions of R with hardware to know whether it is even possible for anyone deeper into the matter to develop an idea what could be behind this behavior. For the moment, I can get rid of the whine by using the mainboard tool AI Gear to reduce the processors speed from 2.4GHz to 1.7GHz when I want to concentrate then the whine is gone (but the simulation is slower). Does anyone have any idea or hints regarding what else I could think about ? Regards, Ulrike ****************************** Prof. Dr. Ulrike Grömping Fachbereich II TFH Berlin Luxemburger Str. 10 13353 Berlin mail: [EMAIL PROTECTED] www: www.tfh-berlin.de/~groemp/ ****************************** ------- End of Forwarded Message ------- ****************************** Prof. Dr. Ulrike Grömping Fachbereich II TFH Berlin Luxemburger Str. 10 13353 Berlin mail: [EMAIL PROTECTED] www: www.tfh-berlin.de/~groemp/ ****************************** [[alternative HTML version deleted]]
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