Stephane Eranian <eran...@google.com> writes: >> > But getting the mmaps at the right moment is crucial for some apps > especially if address space is recycled otherwise symbolization > may be incorrect.
Yes that is why it is only an option and not default. You need to know what you're doing. BTW I think the recycle case is not very likely on non JIT. >> You're right for some special analysis it matters, that is why >> it is only an option. >> >> But for the standard "only care about perf report and >> don't care about about program startup" case it's a nice saving. >> > How do you know in advance you won't need mmap ordering? When I measure a long running process and I know it doesn't fork/dlopen/jit. Using --initial-delay also helps to skip the startup phase or attaching later. I believe it's actually a good choice for most non forky workloads. But yes it cannot be made default. -Andi -- a...@linux.intel.com -- Speaking for myself only -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
