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17947
2016 Nov 27
3
A couple metrics of LLD/ELF's performance
...he memcpy into the output.
We may want to consider a nontemporal memcpy to at least avoid polluting
the cache.
These misses contend on the DRAM bus (although currently it may be
underutilized and so adding more parallelism will help to keep it busy, but
only up to a point).
https://reviews.llvm.org/P7947
--event=dTLB-load-misses
These are dTLB misses for loads (on my machine, it corresponds to any time
that the hardware page table walker kicks in:
https://github.com/torvalds/linux/blob/f92b7604149a55cb601fc0b52911b1e11f0f2514/arch/x86/events/intel/core.c#L434
).
Here we also see the getVA codepath...