Robert Foley <robert.fo...@linaro.org> writes:
> From: "Emilio G. Cota" <c...@braap.org> > > This yields sizable scalability improvements, as the below results show. > > Host: Two Intel E5-2683 v3 14-core CPUs at 2.00 GHz (Haswell) > > Workload: Ubuntu 18.04 ppc64 compiling the linux kernel with > "make -j N", where N is the number of cores in the guest. > > Speedup vs a single thread (higher is better): > > 14 +---------------------------------------------------------------+ > | + + + + + + $$$$$$ + | > | $$$$$ | > | $$$$$$ | > 12 |-+ $A$$ +-| > | $$ | > | $$$ | > 10 |-+ $$ ##D#####################D +-| > | $$$ #####**B**************** | > | $$####***** ***** | > | A$#***** B | > 8 |-+ $$B** +-| > | $$** | > | $** | > 6 |-+ $$* +-| > | A** | > | $B | > | $ | > 4 |-+ $* +-| > | $ | > | $ | > 2 |-+ $ +-| > | $ +cputlb-no-bql $$A$$ | > | A +per-cpu-lock ##D## | > | + + + + + + baseline **B** | > 0 +---------------------------------------------------------------+ > 1 4 8 12 16 20 24 28 > Guest vCPUs > png: https://imgur.com/zZRvS7q Can we re-run these numbers on the re-based series? -- Alex Bennée