Re: XCode 3.1 frequently hangs
Re: XCode 3.1 frequently hangs
- Subject: Re: XCode 3.1 frequently hangs
- From: "Larry Emdur" <email@hidden>
- Date: Wed, 30 Jul 2008 19:03:32 -0700
On Wed, Jul 30, 2008 at 11:56 AM, Andrew Pontious <email@hidden> wrote:
>
> On Jul 30, 2008, at 3:42 AM, Aaron Burghardt wrote:
>
>> Before you uninstall/reinstall, I have another suggestion. Since it is
>> hanging on an lstat() call, it appears to be an issue that can be diagnosed
>> at the file system level. Try using fs_usage to determine the path that is
>> the problem, using my Terminal example below. WIth fs_usage running,
>> recreate the symptom. When Xcode hangs, go back to the Terminal window and
>> see what the last file path is. Since fs_usage is reporting the amount of
>> time spent in the system call, I expect the lstat() that is causing the hang
>> won't have returned yet. In that case, the menu command View -> Clear
>> Scrollback will clear the Terminal window, and when the call does return, it
>> should be at the top of the Terminal window buffer. The last numeric column
>> is the time spent in the system call, so that will help determine which
>> lstat() is the problem.
>>
>> Also, looking at the backtrace, it appears Xcode is indexing the file you
>> just edited. Can you comment out any single #include and affect the
>> symptom?
>>
>> # Get Xcode's PID
>> $ ps aux | grep Xcode.app
>> aburgh 48965 0.0 4.6 774920 191568 ?? S Mon09AM 20:33.92
>> /Developer/Applications/Xcode.app/Contents/MacOS/Xcode -psn_0_684199
>> aburgh 58869 0.0 0.0 599780 468 s005 R+ 6:01AM 0:00.00
>> grep Xcode.app
>>
>> # Use the PID to limit fs_usage's output
>> $ sudo fs_usage -f filesys 48965 | grep lstat
>> 06:08:10 lstat
>> k/System/Library/Frameworks/IOKit.framework/Versions/A/Headers/usb/IOUSBLib.h
>> 0.000021 Xcode
>> 06:08:10 lstat /Volumes/test/MyProject/usbtest-Info.plist
>> 0.000015 Xcode
>> 06:08:10 lstat /Volumes/test/MyProject
>> 0.000004 Xcode
>> 06:08:10 lstat sers/aburgh/Desktop/Another USB Notification
>> Example/USBNotificationExample.c 0.000010 Xcode
>> 06:08:10 lstat
>> /System/Library/Frameworks/IOKit.framework/Versions/A/Headers/IOCFPlugIn.h
>> 0.000011 Xcode
>> 06:08:10 lstat
>> /System/Library/Frameworks/IOKit.framework/Versions/A/Headers/IOReturn.h
>> 0.000009 Xcode
>
> This would just be to tell which file was involved, correct? It's true that
> it might tell us something if it's always the same file.
>
> Larry, if you could try this investigation with fs_usage, I would appreciate
> it. We've had reports of this issue, but we've never been able to reproduce
> it under laboratory conditions.
>
> Please email me directly with your findings.
>
> Also, you don't actually need to uninstall 3.1 and to install 3.0. Just
> install 3.0 in a different location, and only install the relocatable
> portion, so that the portions of 3.1 in e.g. /usr/bin don't get overwritten.
> Those pieces aren't needed during normal Xcode operations anyway, since
> Xcode always uses the relocatable versions.
The result of fs_usage showed that it is always the same file:
lstat net/kpi_interface.h
10.154884 W Xcode
All other files are very quick: around 0.000003s
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Xcode-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden