On Sat, 11 Jun 2022, Rongwei Wang wrote: > > Ok so the idea is to take the lock only if kmem_cache_debug. That looks > > ok. But it still adds a number of new branches etc to the free loop. > > > > Some performance tests would be useful. > Hi Christoph > > Thanks for your time! > Do you have some advice in benchmarks that need me to test? And I find that > hackbench and lkp was used frequently in mm/slub.c commits[1,2]. But I have no > idea how to use these two benchmarks test to cover the above changes. Can you > give some examples? Thanks very much! Hi Rongwei, Well run hackbench with an without the change. There are also synthetic benchmarks available at https://gentwo.org/christoph/slub/tests/ These measure the cycles that slab operations take. However, they are a bit old and I think Pekka may have a newer version of these patches. Greetings, Christoph
