Re: Extremely long lag while loading libraries in gdb
Re: Extremely long lag while loading libraries in gdb
- Subject: Re: Extremely long lag while loading libraries in gdb
- From: Dave MacLachlan <email@hidden>
- Date: Sat, 05 Nov 2005 09:41:42 -0800
When running Shark, were you doing a Time Profile, or a System
Profile? A System Profile may give you more data on what is happening
with external IO. Your other good option is to look at the load with
fs_usage. That at least will tell you if you are I/O bound.
Cheers,
Dave
On Nov 4, 2005, at 7:45 PM, Daniel Jalkut wrote:
Recently I've started experiencing *extremely* long (like 30
seconds or more) lags while "loading libraries" during a debug
session, either from gdb command line or through Xcode. The delay
is striking and fairly new, but I am 99% sure I started seeing it
before recently updating to Xcode 2.2. Any suggestions for how I
might proceed with debugging this problem?
As I said, I'm 99% sure I started seeing it prior to 2.2, and if
anybody is curious, I am *not* using the new feature of Xcode that
is advertised in the release notes as potentially leading to longer
debugger startup times.
I tried running Shark against gdb while the long delay was
happening, but it seemed pretty meaningless to me. In fact, it
seemed like the total seconds in gdb was much less than the total
seconds in user waiting time. I assume this means that gdb is
blocked on waiting for some external IO to happen, or something.
Any advice appreciated,
Daniel
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