On Wed, 2025-08-20 at 18:01 +0200, Kevin Brodsky wrote: > Apologies, Thunderbird helpfully decided to wrap around that table... > Here's the unmangled table: > > +-------------------+----------------------------------+------------------+---------------+ > > Benchmark | Result Class | Without batching | > > With batching | > +===================+==================================+==================+===============+ > > mmtests/kernbench | real time | 0.32% | > > 0.35% | > > | system time | (R) 4.18% | > > (R) 3.18% | > > | user time | 0.08% | > > 0.20% | > +-------------------+----------------------------------+------------------+---------------+ > > micromm/fork | fork: h:0 | (R) 221.39% | > > (R) 3.35% | > > | fork: h:1 | (R) 282.89% | > > (R) 6.99% | > +-------------------+----------------------------------+------------------+---------------+ > > micromm/munmap | munmap: h:0 | (R) 17.37% | > > -0.28% | > > | munmap: h:1 | (R) 172.61% | > > (R) 8.08% | > +-------------------+----------------------------------+------------------+---------------+ > > micromm/vmalloc | fix_size_alloc_test: p:1, h:0 | (R) 15.54% | > > (R) 12.57% |
Both this and the previous one have the 95% confidence interval. So it saw a 16% speed up with direct map modification. Possible? > > | fix_size_alloc_test: p:4, h:0 | (R) 39.18% | > > (R) 9.13% | > > | fix_size_alloc_test: p:16, h:0 | (R) 65.81% | > > 2.97% | > > | fix_size_alloc_test: p:64, h:0 | (R) 83.39% | > > -0.49% | > > | fix_size_alloc_test: p:256, h:0 | (R) 87.85% | > > (I) -2.04% | > > | fix_size_alloc_test: p:16, h:1 | (R) 51.21% | > > 3.77% | > > | fix_size_alloc_test: p:64, h:1 | (R) 60.02% | > > 0.99% | > > | fix_size_alloc_test: p:256, h:1 | (R) 63.82% | > > 1.16% | > > | random_size_alloc_test: p:1, h:0 | (R) 77.79% | > > -0.51% | > > | vm_map_ram_test: p:1, h:0 | (R) 30.67% | > > (R) 27.09% | > +-------------------+----------------------------------+------------------+---------------+ Hmm, still surprisingly low to me, but ok. It would be good have x86 and arm work the same, but I don't think we have line of sight to x86 currently. And I actually never did real benchmarks.
