On Sun, 28 Jun 2020 14:46:16 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > We added a bunch of code to libbcc in the past to support instances, > > but eventually removed it all due to memory overhead per instance. > > If I recall it was ~8Mbyte per instance. That was couple years ago. > > I'd like to see where that 8 MB per instance came from. You can control > the size of the instance buffers. If size is still an issue, I'll be > happy to work with you to fix it. Looks to be the duplication of the event directory tree. There's a lot of duplicate data there. Instead of just punting and saying "instances are too large" perhaps you could get someone to look at a way to consolidate that data? I'm sure there's a lot of ways to help here. Or you can just create a new event called bpf_printk() that passes in and records a string and enable that automatically when a bpf module has it. That could work as well. In either case, your use of trace_printk() is an abuse of its purpose. -- Steve
