Kashyap Chamarthy <kashyap.cv@xxxxxxxxx> wrote on 13/05/2013 03:30:03 PM: > > 1] VMCS Shadowing *enabled* on L0; Kernel build on L2, > 3.10.0-0.rc0.git26.1.fc20.x86_64 > > Kernel build time on L2 > ------------------------------ > > $ time make > [...] > real 31m0.386s > user 16m43.655s > sys 14m6.451s > > kvm_stat intervals on L1 > ------------------------------- > > - http://kashyapc.fedorapeople.org/virt/kvm_stat-VMCS-Shadowing/ > kvm_stat-L0-VMCS-Shadowing-enabled.txt > > - NOTE: The below statistics are from intervals ranging from > 30 seconds to 6,10,13.. minutes. > > > 2] VMCS Shadowing *disabled* on L0; Kernel build on L2, > 3.10.0-0.rc0.git26.1.fc20.x86_64 > > Kernel build time on L2 > ------------------------------ > $ time make > [...] > real 40m56.010s > user 20m19.061s > sys 19m57.723s > > kvm_stat intervals on L1 > ------------------------------- > > - http://kashyapc.fedorapeople.org/virt/kvm_stat-VMCS-Shadowing/ > kvm_stat-L0-VMCS-Shadowing-disabled.txt > > - NOTE: The below statistics are from intervals ranging from > 30 seconds to 6,10,13.. minutes. > > Looks better ? Much better :) Now seems the results were improved by 25% (reduced 10m of 40m) > (Note to self: Maybe I should run these more number of times to > monitor consistency) Yes, that's a good point. You could start with a short make and repeat the experiments to verify the results are consistent. Once you have reproducible results with a short make you can move to back to a long make. Note that if you just run make then the source files will be loaded from disk only the first run (lot of I/O, which is slow with nested). Next runs may load the files from the page-cache and you may notice a performance improvement. Maybe, that's why your results were not like we expected in the first time. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
