Finally got around to it, kern/182818. Thanks for the encouragement. On 10/12/12 11:14, Adam McDougall wrote: > I did not, but I put it on my list to try to accomplish. > > On 10/11/12 13:41, Adrian Chadd wrote: >> Did you ever file a PR for the slow SATA behaviour? >> >> >> >> Adrian >> >> >> On 11 October 2012 09:52, Adam McDougall <mcdouga9_at_egr.msu.edu> wrote: >>> >>> Be wary of the Soekris net6501, I bought three of the 1.6Ghz net6501-70 >>> model which has an Atom E-680 cpu (E series) and it compiles more >>> than twice >>> as slow as a 1.6Ghz Atom N270 in an older netbook. Someone else >>> running >>> Linux reported similar CPU slowness. As far as practical network >>> throughput, I could only get 100Mbit/sec with a simple HTTP download >>> of a >>> file full of zeros, and OpenVPN could only push about 25Mbit/sec. As a >>> practical example of the CPU slowness, it takes about 1.5 minutes to >>> compile >>> pkg on the N270 netbook and 5 minutes on the 6501 (around 4.5 if I >>> use -j2). >>> A kernel compile took an hour. Unfortunately I had no idea this CPU >>> (possibly implementation?) was so slow before I purchased it, and I >>> could >>> scarcely find evidence of it on google after hours of searching when >>> I had >>> already discovered the issue. I was hoping to find some comparative >>> benchmarks between various Atom series but manufacturers generally >>> don't do >>> that. >>> >>> Additionally, the total AHCI SATA write speed on the net6501 (in BSD >>> only?) >>> has a strange 20MB/sec limitation but reads can go over 100MB/sec. >>> If I >>> write to one disk I get 20MB/sec, if I write to both SATA disks I get >>> 10MB/sec each. Write is equally slow on a SSD. Both someone running >>> OpenBSD and I running FreeBSD reported the same symptoms to the >>> soekris-tech >>> mailing list and received no useful replies towards getting that >>> problem >>> solved. I tested the write speed briefly with Linux and it did not >>> appear >>> to have the 20MB/sec limitation. I did confirm it was using >>> MSI(-X?) with >>> boot -v. I think this hardware would need to fall into Alexander >>> Motin's >>> hands to get anywhere with debugging the SATA speed issue. Since it >>> seems >>> fine in Linux, maybe some day it can be fixed in BSD but I have no >>> clue how >>> that limitation could happen. The disks I tested with are fine in >>> normal >>> computers. >>> >>> _______________________________________________ >>> freebsd-current_at_freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-current >>> To unsubscribe, send any mail to >>> "freebsd-current-unsubscribe_at_freebsd.org" >Received on Mon Oct 07 2013 - 22:49:20 UTC
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