On 23/08/2015 17:24, Emilio G. Cota wrote: > This reverts commit 81f3053b77f7d3a4d9100c425cd8cec99ee7a3d4. > > The interrupt raised by the change in the commit above > kills performance when running many idling VCPUs. For example, > on my 64-core host when running a workload where cores are > idling often (e.g. blackscholes), performance drops significantly > because threads are most of the time just exiting the CPU loop, > thereby causing great contention on the BQL. > > Fix it by reverting to the old behaviour by which no > interrupt is raised, which shouldn't be an issue given that > we have now one thread per VCPU. > > Signed-off-by: Emilio G. Cota <c...@braap.org>
Agreed, this is not necessary anymore! Paolo
