Nicholas Lee
2005-Oct-06 23:03 UTC
Re: [Xen-devel] SMP dom0 and AMD64? + some benchmark figures
On 10/7/05, Paul Larson <plars@dopanic.myftp.org> wrote:> Ian Pratt wrote: > >SMP dom0 should work fine, but non-SMP is more stable.Right. Once Xen gets to 3.0.5+ or similar will there be a recommended config? How does the performance profile work with SMP and the interaction between domU and dom0 for CPU bound I/O? Are the CPU slices allocated independantly for each CPU in SMP domains?> Since we''re supposed to be flushing out bugs, could we consider changing > this to default to SMP dom0 to help get more exposure here?I should be able to test out my NX based desktop over the weekend. Of quick interest might be one of the benchmarks I use: nic@wuwei:~/sys/ufc$ ./speedf # 32bit Debian/Sarge 2.4.26-1-386 Running UFC-crypt for 100 seconds of virtual time ... Did 153237.030000 fcrypt()s per second. nic@wuwei:~/sys/speedf/ufc$ ./speedf # 64bit Debian/Sarge 2.6.8-11-amd64-generic Running UFC-crypt for 100 seconds of virtual time ... Did 300135.843750 fcrypt()s per second. nic@wuwei:~/sys/speedf/ufc$ ./speedf # 2.6.12-xen0 #3 SMP Running UFC-crypt for 100 seconds of virtual time ... Did 293966.906250 fcrypt()s per second. speedf is pretty much a single processor testing, but Xen 3.0 holds up well only dropping 2%. I don''t have 2.0 figures yet, and I''ll get some domU figures later this weekend. -- Nicholas Lee http://stateless.geek.nz gpg 8072 4F86 EDCD 4FC1 18EF 5BDD 07B0 9597 6D58 D70C _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel