On Mon, Dec 21, 2020 at 04:00:26PM +0900, Namhyung Kim wrote: > Hello, > > This is to optimize the event synthesis during perf record. > > The first patch is to reduce memory usage when many threads are used. > The second is to avoid unncessary syscalls for kernel threads. And > the last one is to reduce the number of threads to iterate when new > threads are being created at the same time. > > Unfortunately there's no dramatic improvement here but I can see ~5% > gain in the 'perf bench internals synthesize' on a big machine. > (The numbers are not stable though)
Looks all good to me. The VmPeak assumption might be slightly fragile, but I guess there's nothing better currently. Reviewed-by: Andi Kleen <a...@linux.intel.com> -Andi
