>I'd like to object: Some long time ago someone (I can't remember) made a test >over an extended period of time showing that Linux did not loose a single >interrupt. However depending on the drivers and crappy hardware (not to talk >about CPU frequency scaling and ACPI's various power saving modes), the system >may loose interrupts. For any hardware there is a rate of interrupts that >cannot be handled. For my 16MHz 386SX that rate was quite low.
It may depend upon which version/distributino of Linux you are talking about. I have an old RH 7.2 system. After a reasonably vanilla install, it was using PIO for disk accesses. Any big burst of disk activity would cause missed interrupts. I have a test hack for measuring disk bandwidth. It would totally trash the clock. After poking around a bit I found some simple way to activate the DMA mechanism. That solved the problem for me. I forget the details. If anybody is still having troubles with lost interrupts on Linux I'll try to track it down and contribute it to a FAQ or such. There may be similar problems with some network adapters. -- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
