On Fri, Aug 19, 2016 at 2:19 PM, Paul E. McKenney <paul...@linux.vnet.ibm.com> wrote: > On Fri, Aug 19, 2016 at 01:56:11PM -0700, Andi Kleen wrote: >> >> malloc is the primary target I believe. Saves lots of memory to keep >> caches per CPU rather than per thread. > > Agreed, a competent default malloc() in glibc would be a very nice change > from the current state.
I agree that malloc can be a very good target for something like this, but it is also something that is quite complicated. A general-purpose allocator that could be used by glibc and has not just the performance but the debug stuff etc that people inevitably want is a big project. And then the people who have special needs end up writing their own allocators anyway, just because they care about certain layout and access patterns... Put another way: I'd really like to see some real numbers and use, rather than "this can be used for.." Linus