-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cheers, Gavin (hope you're well, BTW)!
Any real-world ballpark figures on how "killed" performance is (and does your site disable those patches)? On 03/08/2018 02:36 PM, Gavin W. Burris wrote: > Just had our biannual maintenance window. All the things are > patched. One could disable the performance-killing patches with > the "noibrs noibpb nopti" grub options. Cheers. > > On Thu 03/08/18 01:55PM EST, Ryan Novosielski wrote: >> I have been waiting, specifically, for Prentice Bisbal to try it. >> :-P >> >> I actually have not checked to see whether any other upgrades >> I’ve applied have handled these vulnerabilities (I’d assume >> RedHat would have patched their distribution). FWIW, however, I >> did receive a report that one of our newer images seemed slower. >> Haven’t gotten a chance to fully investigate those reports — >> could be any number of other things. >> >> -- ____ || \\UTGERS, >> |---------------------------*O*--------------------------- ||_// >> the State | Ryan Novosielski - >> [email protected]<mailto:[email protected]> || \\ >> University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS >> Campus || \\ of NJ | Office of Advanced Research >> Computing - MSB C630, Newark `' >> >> On Mar 8, 2018, at 13:13, Alex Chekholko via Beowulf >> <[email protected]<mailto:[email protected]>> wrote: >> >> As an experienced and cynical HPC admin working with trusted >> users... I have not installed any kind of firmware or kernel >> updates. I'll wait for you to go first :) >> >> On Thu, Mar 8, 2018 at 10:10 AM, Prentice Bisbal >> <[email protected]<mailto:[email protected]>> wrote: Beowulfers, >> >> Have any of you updated the kernels on your clusters to fix the >> Spectre and Meltdown vulnerabilities? I was following this issue >> closely for the first couple of weeks. There seemed to be a lack >> of consensus on how much these fixed would impact HPC jobs, and >> if I recall correctly, some of the patches really hurt >> performance, or caused other problems. We took a wait-and-see >> approach here. So now that I've waited a while, what did you >> see? >> >> -- Prentice >> >> _______________________________________________ Beowulf mailing >> list, [email protected]<mailto:[email protected]> sponsored >> by Penguin Computing To change your subscription (digest mode or >> unsubscribe) visit >> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.b eowulf.org%2Fmailman%2Flistinfo%2Fbeowulf&data=02%7C01%7Cnovosirj%40rutg ers.edu%7Ca91c0d09885047db8ded08d5852beaa4%7Cb92d2b234d35447093ff69aca66 32ffe%7C1%7C1%7C636561346021256640&sdata=Eq4smdlMLwxS4nNkgAZlfDcc6Sl2gl3 NvuRZrt3AIxI%3D&reserved=0<https://na01.safelinks.protection.outlook.com /?url=http%3A%2F%2Fwww.beowulf.org%2Fmailman%2Flistinfo%2Fbeowulf&data=0 2%7C01%7Cnovosirj%40rutgers.edu%7Cc4cd547515a346014d0d08d5852058a0%7Cb92 d2b234d35447093ff69aca6632ffe%7C1%7C0%7C636561296368291958&sdata=4fTJudM 1x6k1L3KPRsLITJEy%2FKI%2FqaXOGJ6qwDJmgG4%3D&reserved=0> >> >> >> >> >> _______________________________________________ >> Beowulf mailing list, >> [email protected]<mailto:[email protected]> sponsored by >> Penguin Computing To change your subscription (digest mode or >> unsubscribe) visit >> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.b eowulf.org%2Fmailman%2Flistinfo%2Fbeowulf&data=02%7C01%7Cnovosirj%40rutg ers.edu%7Cc4cd547515a346014d0d08d5852058a0%7Cb92d2b234d35447093ff69aca66 32ffe%7C1%7C0%7C636561296368291958&sdata=4fTJudM1x6k1L3KPRsLITJEy%2FKI%2 FqaXOGJ6qwDJmgG4%3D&reserved=0 > >> >> >> _______________________________________________ Beowulf mailing >> list, [email protected] sponsored by Penguin Computing To >> change your subscription (digest mode or unsubscribe) visit >> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.b eowulf.org%2Fmailman%2Flistinfo%2Fbeowulf&data=02%7C01%7Cnovosirj%40rutg ers.edu%7Ca91c0d09885047db8ded08d5852beaa4%7Cb92d2b234d35447093ff69aca66 32ffe%7C1%7C1%7C636561346021256640&sdata=Eq4smdlMLwxS4nNkgAZlfDcc6Sl2gl3 NvuRZrt3AIxI%3D&reserved=0 > >> >> >> > - -- ____ || \\UTGERS, |----------------------*O*------------------------ ||_// the State | Ryan Novosielski - [email protected] || \\ University | Sr. Technologist - 973/972.0922 ~*~ RBHS Campus || \\ of NJ | Office of Advanced Res. Comp. - MSB C630, Newark `' -----BEGIN PGP SIGNATURE----- iFwEARECABwFAlqhk08VHG5vdm9zaXJqQHJ1dGdlcnMuZWR1AAoJEJm/oGnRHLG+ Uk4AoLLJenA1AFzo0LZ7wiIOeDXj1VdkAJ9qMYhw/9mDyfjKmrxLxi7/0eCvLA== =MQ/T -----END PGP SIGNATURE----- _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
