Re: [ptp-dev] Opening remote projects very slow

[Chris Recoskie <recoskie@xxxxxxxxxx>]

Yes, we should... against CDT. I'll take care of it as I'll be able to generate the stack trace for the bug report.

===========================
Chris Recoskie
Team Lead, IBM CDT and RDT
IBM Toronto
Dave Wootton <dwootton@xxxxxxxxxx>

Dave Wootton <dwootton@xxxxxxxxxx>
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Subject	Re: [ptp-dev] Opening remote projects very slow

Chris
I cloned my remote directory and created a new remote project using 'other 
toolchain'. I was able to open and close that project repeatedly, 
including after restarting Eclipse, and had no problems. I'm also seeing 
the project opening within a few seconds, accessing by cable modem.

I tried to open one of my existing projects and that hung immediately. So 
it looks like this is related to the toolchain selection somehow. I have 
no problem using the workaround.

Does somebody need to write a Bugzilla report for this?

Dave



Chris Recoskie <recoskie@xxxxxxxxxx> 
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12/04/2008 02:15 PM
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Re: [ptp-dev] Opening remote projects very slow






I was able to connect to your machine and do some debugging. The problem 
seems to occur when you select the XL C/C++ toolchain for the project. The 
scanner info generator kicks off when the project is opened, and for some 
reason this causes a deadlock in the resource system when it tries to 
create markers on the project. I think this is probably a deeper issue 
with CDT so I'm not sure how soon that can be fixed.

If I don't select the XL toolchain, opening a project on your machine 
takes about 5 seconds for me, which seems reasonable given the distance 
involved.

For the timebeing as a workaround, I would simply suggest you choose 
"Other toolchain". Right now the toolchain settings have no real benefit 
for remote projects anyway, so there is no reason to choose it.

Try this and let me know how it works out for you.

===========================
Chris Recoskie
Team Lead, IBM CDT and RDT
IBM Toronto
Dave Wootton <dwootton@xxxxxxxxxx>


Dave Wootton <dwootton@xxxxxxxxxx> 
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Re: [ptp-dev] Opening remote projects very slow





Chris
I created a brand new remote makefile project containing a single small .c 

file, a Makefile and the executable. It took a few seconds for the project 

create to complete, but more or less reasonable. Then I closed the project 

and reopened it. The attempt to reopen it hung. I killed Eclipse and 
restarted it. I tried to open the project without starting the rdt server 
first, and that took a couple minutes, but then the project was open 
(without showing any files). I restarted Eclipse, started the rdt server 
and tried to open the project and the open project dialog has been hung 
for a few minutes now.

There's nobody else on the machine, and load average is 0.42 0.39 0.45.

I'm doing this via cable modem this week. Upload speed is about 
56kbytes/sec for a 40MB file and download speed is about 235kbytes/sec for 

a 25MB file. I saw the same problem at Supercomputing last week, where 
they are supposed to have very good network connections. What interactive 
response I saw to remote systems was reasonable to me. I also see this in 
my office, where the network also performs reasonably well.

I'm doing this from a Windows XP system. Last week was Windows Vista. I 
don't have access to a Linux system where I can run Eclipse and get to my 
test machine and I have no Mac systems.

I have what should be the latest rdt server on this machine, but double 
check.

I'll send you a private email with instructions to get to my machine.
Dave



Chris Recoskie <recoskie@xxxxxxxxxx> 
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Re: [ptp-dev] Opening remote projects very slow






Dave,

I'm not sure I can provide any meaningful analysis on this without 
debugging your specific setup. In my experience, opening a simple "hello 
world" makefile project doesn't take more than a few seconds, even when I 
do it at home via VPN to a remote machine here in the lab. For me the 
behaviour is more or less the same regardless of the backend I connect to 
(I've used AIX, Linux x86, and Mac OSX).

If you have a lot of files and folders in your project, I can see the 
operation taking a while as Eclipse wants to do a deep refresh of the 
project when it's opened. That is hard to get around without changing the 
behaviour of the platform resources plug-in. But given your description of 

your projects, that would not seem to apply.

How much have you ruled out the performance of the network or of the 
remote machine? What throughput do you get to the machine when doing a 
large file transfer? Is the CPU on the remote machine heavily loaded? Is 
it I/O thrashing?

I'm willing to help debug this with you if you can grant me access to the 
system you're using.

===========================

Chris Recoskie
Team Lead, IBM CDT Team
IBM Toronto
http://www.eclipse.org/cdt

Dave Wootton <dwootton@xxxxxxxxxx>


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[ptp-dev] Opening remote projects very slow





Has anyone had the opportunity to look at this problem? I tried opening 
remote projects again this morning. I made 5 attempts to open a remote 
project and 4 of them either hung or took a long time (more than 5 
minutes) to open, so I killed Eclipse. One attempt took a long time but 
finally opened after a few minutes. This morning's attempts are over a 
cable modem connection which is otherwise fairly responsive. I had similar 


problems last week at SC08 with a Windows Vista system which had Eclipse 
3.4, PTP 2.1, CDT 5.0.2 and the RSE runtime installed. When I started up 
in the morning, I frequently had an open project request hang, and I had 
to restart Eclipse multiple times to get all my remote projects working. I 


finally gave up and used local projects except for my debugger demo

This morning, when I clicked open project, the Open project popup appeared 


and the progress bar briefly appeared and showed some progress then 
disappeared. The status line at the bottom of the Eclipse window said that 


OpenProject was about 25% complete and it did not update. After a few 
seconds, the cursor changed to an hourglass when over the Open Project 
popup client area or over the Eclipse main window. At this point, Eclipse 
is unresponsive, except that the main window is repainted when I move the 
Open Project popup around over the main window. If I click the red close 
icon in either the Open Project popup or the Eclipse main window, I get a 
Windows popup telling me that Eclipse is not responding and I end up 
killing Eclipse.

When I ran on a Vista system at SC08, if I watched closely, it appeared as 


if the Open Project popup would appear, start to go away, then very 
quickly reappear again. I'm not sure if there is something causing a 
second instance of the Open Project dialog to be displayed or if I was 
just seeing things.

The remote projects I'm trying to open are small remote makefile projects 
with one or two .c files, a Makefile, and the executables. I'm seeing this 


when attemping to open projects on both AIX and ppc Linux systems.


Dave
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