On Tue, Nov 25, 2014 at 8:42 PM, Chenggang <[email protected]> wrote:

> All programs are wrote by C/C++, compiler is GCC/G++, the version is 4.1.2.

Please note that this compiler is quite old, and is known to produce
incomplete and/or incorrect unwind info.

That in turn causes libunwind to take slow path under some conditions
(though I believe that this is more pronounced with in-process
unwinding), and may be a contributing factor here.


-- 
Paul Pluzhnikov

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