I'll have to put together a system that mimics this behavior. But I don't have something like that handy right now.
We primarily see folks forking too many procs, running fat java apps, or cpu hogs. There is a multiplicative effect, as we typically have half a dozen or so researchers run "proof of concept" code shortly before paper deadlines. I.e., no one researcher is trying to kill the system, but all of them together get the system into strange overload scenarios. While we deal quite handily with the cpu hogs using our own proportional share scheduler, the prior two cause a fair amount of swapping that choke the rest of the system. My hope is that with the memory and io controller we can better isolate poorly behaving vservers from those that are well-designed and run within reasonable resource bounds. Marc -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Shailabh Nagar Sent: Friday, September 17, 2004 10:12 AM To: Marc E. Fiuczynski Cc: ckrm-Tech Subject: Re: [ckrm-tech] containing "anti-social" processes Marc E. Fiuczynski wrote: > With the new controllers in CKRM in place, has anyone looked at whether > these controllers are sufficient to isolate "anti-social" behavior (e.g., > fork bombs, i/o bombs, etc.)? In other words, assuming these anti-social > processes were placed into an appropriate class, do the other classes obtain > their share of the system resources? I ask as this is an important piece > that we wish to get right for PlanetLab. > > Marc Marc, if you have test setups which mimic the kind of anti-social behaviour you expect or have seen on PlanetLab, that'd be handy. Shailabh ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ ckrm-tech mailing list https://lists.sourceforge.net/lists/listinfo/ckrm-tech
