What about the expense of matching on the function name?
You are saying that the kernel trap overwhelms that, right? On Sep 9, 2009, at 10:20 PM, Chad Mynhier wrote:
No, it's not significantly more efficient. Both function entry/return probes and USDT probes involve replacing an instruction in the stream with a trap instruction. The expense of the trap into the kernel is going to overwhelm any subtleties in handling between the two different types of probes.
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