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Re: [Monotone-devel] oprofile data for mtn 0.37.
From: |
Zack Weinberg |
Subject: |
Re: [Monotone-devel] oprofile data for mtn 0.37. |
Date: |
Wed, 12 Mar 2008 17:19:50 -0400 |
On Wed, Mar 12, 2008 at 3:13 PM, Jack Lloyd <address@hidden> wrote:
> On Wed, Mar 12, 2008 at 02:27:58PM -0400, Zack Weinberg wrote:
> > Top of profile is
> >
> > 9678874 11.1247 std::_Rb_tree<std::string, std::pair<std::string
> > const, Botan::Mutex*> ...>
Just to clarify, that leading number is absolute samples in function,
not a call count.
> I'm pretty surprised it is that high though (both in call counts, and
> b/c generally where it is called something else that is expensive is
> going on). But clearly no matter what the circumstances this is not
> ideal!
It occurs to me that we (monotone) create and destroy one Botan::Pipe
and at least one subclass of Botan::Filter for every call to most of
the functions in transform.hh. If there's a global lock around
allocating the memory for that, that could explain it. [Is it
practical to bypass the Pipe interface and manipulate e.g. Hex_Encoder
directly?]
> 3) Drop global shared state wholesale, and require applications to
> maintain any per-thread or per-process state (the RNG, allocators,
> etc). [I've been leaning towards this of late for various other
> reasons anyway]
This would be my choice, being the most efficient option for a
single-threaded program like Monotone.
zw
- [Monotone-devel] oprofile data for mtn 0.37., jack-monotone, 2008/03/12
- Re: [Monotone-devel] oprofile data for mtn 0.37., Zack Weinberg, 2008/03/12
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/12
- Re: [Monotone-devel] oprofile data for mtn 0.37.,
Zack Weinberg <=
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/12
- Re: [Monotone-devel] oprofile data for mtn 0.37., Zack Weinberg, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Zack Weinberg, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Zack Weinberg, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Zack Weinberg, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/13
- Re: [Monotone-devel] oprofile data for mtn 0.37., Jack Lloyd, 2008/03/14