I would agree with Vic that in most cases the issues are with the underlying network communication. We are using the cgroups to mainly protect against runaway processes that attempt to consume all memory on the system, -Bryan
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, March 02, 2016 2:15 PM To: gpfsug main discussion list Subject: Re: [gpfsug-discuss] cpu shielding Hi, How sure are you that it is cpu scheduling that is your problem? Are you using IB or Ethernet? I have seen problems that look like yours in the past with single-network Ethernet setups. Regards, Vic Sent from my iPhone > On 2 Mar 2016, at 20:54, Matt Weil <[email protected]> wrote: > > Can you share anything more? > We are trying all system related items on cpu0 GPFS is on cpu1 and the > rest are used for the lsf scheduler. With that setup we still see > evictions. > > Thanks > Matt > >> On 3/2/16 1:49 PM, Bryan Banister wrote: >> We do use cgroups to isolate user applications into a separate cgroup which >> provides some headroom of CPU and memory resources for the rest of the >> system services including GPFS and its required components such SSH, etc. >> -B >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Matt >> Weil >> Sent: Wednesday, March 02, 2016 1:47 PM >> To: gpfsug main discussion list >> Subject: [gpfsug-discuss] cpu shielding >> >> All, >> >> We are seeing issues on our GPFS clients where mmfsd is not able to respond >> in time to renew its lease. Once that happens the file system is unmounted. >> We are experimenting with c groups to tie mmfsd and others to specified >> cpu's. Any recommendations out there on how to shield GPFS from other >> process? >> >> Our system design has all PCI going through the first socket and that seems >> to be some contention there as the RAID controller with SSD's and nics are >> on that same bus. >> >> Thanks >> >> Matt >> >> >> ____ >> This email message is a private communication. The information transmitted, >> including attachments, is intended only for the person or entity to which it >> is addressed and may contain confidential, privileged, and/or proprietary >> material. Any review, duplication, retransmission, distribution, or other >> use of, or taking of any action in reliance upon, this information by >> persons or entities other than the intended recipient is unauthorized by the >> sender and is prohibited. If you have received this message in error, please >> contact the sender immediately by return email and delete the original >> message from all computer systems. 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