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Re: Fw: [ltc-interlock] [RFC] draft NFS trace hooks (fwd)
Tony Reix <tony.reix@bull.net> writes:
> [...] I'm not sure I perfectly understood the explanations, but it
> seems to me that "dynamic" probes do require gcc to provide
> debugging information that prevent it to run full optimizations.
No, we don't interfere with gcc optimization, and in exchange may
receive less-than-perfect debugging information. Systemtap can
usually make do with that, or tell the user otherwise during
script translation.
> On the contrary, "Static probing markers" are "faster and more
> precise than kprobes", at the cost of the "waste of a few cycles".
> I have to read the end of the paper, but mixing dynamic and static
> probes could be useful.
Indeed, that's the hope. We just need some brave souls to start
plopping markers in.
- FChE