On Sun, Jan 12, 2014 at 6:40 PM, Joe Van Dyk <[email protected]> wrote:
> from "perf top":
>
> 75.38%  [kernel]               [k] hypercall_page
> 3.39%  python2.7              [.] 0x179be3
> 3.18%  libc-2.15.so           [.] 0x140931
> 2.86%  libcrypto.so.1.0.0     [.] 0x66dbf
> 2.78%  python2.7              [.] PyEval_EvalFrameEx
> 1.77%  liblzo2.so.2.0.0       [.] lzo1x_decompress_safe
> 1.02%  [kernel]               [k] copy_user_generic_string
> 0.73%  liblzo2.so.2.0.0       [.] lzo_adler32
> 0.59%  python2.7              [.] _PyObject_GenericGetAttrWithDict
> 0.28%  libc-2.15.so           [.] epoll_ctl

Yeah, this is the kind of trace I don't know what to do about.  I
suspect it's from making too many syscalls, but I'm not sure, and
cursory search doesn't give me a slam dunk either, roughly the same as
last time.  Someone who knows Xen a bit is going to have to divine
something or I have to put aside a block of time to figure out what it
means, which is why I didn't go ahead and Just Fix It in the past.

Another profitable use of time might be to run the program through one
of the Python-level profilers.  Lately I've been thinking I should
commit "hidden" (as to not clutter the help messages) '--debug'-family
options, including that one.

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