* Alexey Suslikov <[email protected]> [2010-10-13 13:15]: > Henning Brauer wrote: > > > * Anton Maksimenkov <[email protected]> [2010-10-13 11:33]: > > > BTW, in worst case (I used ping -f, just can't find anything useful to > > > generate many small packets) "re" generate about 5000 interrupts. > > > While "vr" on same machine can do about 20 000 interrupts and the > > > machine still stay. > > > > the interrupt counts say nothing really. you don't know if there is > > any interrupt mitigation in action, and if so, they do differ between > > the various chips, too. > > Am I understood correctly that mitigation occurs more frequently > under high load and has no accountable effect on moderate load > (i.e. more load, more interrupts get mitigated and vice versa)?
depends. but roughly right. > If so, is 5k interrupts that high to take mitigation in account? 20k? well, int count goes down when mitigation kicks in. so driver A at 5k int/s could very well handle the same number of pps as driver B at 20k int/s. -- Henning Brauer, [email protected], [email protected] BS Web Services, http://bsws.de Full-Service ISP - Secure Hosting, Mail and DNS Services Dedicated Servers, Rootservers, Application Hosting
