Applications idle for 10 seconds before starting

Hello,
I've just upgraded my rig from the ole' trusty P4 to a blazingly fast C2D. Since I have 4GB RAM, the only option was Arch64. Eager to conquer new lands, I set sail.
Since yesterday I've installed just about everything. The system works flawlessly and is extremely responsive. The only problem I have (which I didn't have on my P4) is that the applications not always start when they should. Sometimes they wait exactly 10s for who knows what. And then they launch.
For example:
mc [enter]
<instant launch>
F10 [enter]
mc [enter]
<instant launch>
F10 [enter]
mc [enter]
<waits 10 seconds, then launches>
And so on, it's completely random. It does that in X and in virtual console, everywhere.
At first I thought it may be UvesaFB, but I removed it and it still does that. Any ideas?
Full specs:
Arch 64, Gnome + Openbox.
Intel e7400
nVidia GeForce GTX 260
2x2GB RAM
Asus P5Q Pro
And yes, I've removed the IPv6 module.
Here's a time:
[aidenn@intruder ~]$ time mc
real 0m10.458s
user 0m0.007s
sys 0m0.003s
I quit as soon as it launches, real is always over 10s.
Last edited by Aidenn (2009-03-12 07:40:43)

Aw crap, such a basic mistake. Yes, that fixed it, thanks. ;)
It's because with the P4 I had a static network and now I have DHCP, so I figured localhost would suffice. I added the hostname after localhost and voila, problem be gone. Damn, that was tricky.
-- edit --
Now I have another problem. I thought it was one issue, but it seems there are two. gnome-terminal doesn't always work. Sometimes it opens up a window and sits there without writing anything. Though this one is not for 10s, but indefinitely. Halp?
-- second edit --
Nevermind, it fixed itself. Prolly didn't register the hostname for a while. Thanks for everything and sory for the bother. ;p
-- third edit --
Wait, it did it again. ;p
It seems like a 1:100 affair. Only with gnome-terminal though, everything else works as advertised.
Last edited by Aidenn (2009-03-12 08:15:09)

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11. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Terms of Use of the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

Application lags, until second Instance is started - AND no lagging on another machine...

Hey, it's me again:
The last days I started to get along with LabWindows quite well, and my program grew very fast, but today I found a probleme, I do not really know how to handle.
When I compile my program (both in "debug" and "release"-mode), and start it, it lags quite a lot, but the another version, I still had from friday and did NOT lag that day, started to lag too. So there must be any problem with maybe the configuration or whatever.
But the weirdest thing:
When I first start one Version (does not matter which one), and than afterwards start another Instance of it, or a complete other Version (maybe one Version of Friday, and on I just compiled), the second Application (which lags when being started alone), does NOT lag at all.
In addition to that, all Versions do NOT lag, when I start them on a little netbook, where they're supposed to be used anyway.
Sumarizing:
1 Instance --> lagging
2 Instances --> first lags, second doesn't
This whole thing is very frustrating
I hope, some of you may know what to do!
Greetings from Lübeck
Mathias

MacMatze:
Glad you found the problem. You don't need to be embarrassed by it, but you should learn from it. It sounds like you need to do some error handling, and should probably do some status reporting. Here are a couple of suggestions.
1. To troubleshoot a "lagging" problem, you could single-step through your code to see which statement takes longer than you expect.
2. If the problem was that a power supply was unplugged, it was still unplugged when you started your second instance of the program. I'd guess you didn't see the lag on the second instance because one or more errors were generated because some resource (maybe like a COM port) was already tied up by the first instance. Since you didn't mention getting error when you started your second instance, I'd guess that you are ignoring errors that you should be handling. Many functions indicate errors in their return variables. Review your code for functions whose return variables you are ignoring. Handle them as needed, even if it's just with a dialog box.
3. "Of course" your supply will always be plugged in? Have you heard of Murphy's Law? If it was unplugged for you, it might be unplugged for another user. Or the fuse may blow or the power supply may die. You should find a way to detect and report conditions like that, so your user isn't wondering why the program isn't starting.
4. If you have multiple steps in your program or hardware initialization, you could put up a status bar with messages indicating the current operation, so if the program appears to hang, at least the user has some idea on what the program is trying to do.

Macbook air 2013 needs power button pressed for 10 seconds before it turns on?

macbook air 2013 needs power button pressed for 10 seconds before it turns on? also I've tried resting PRAM but when i press the 4 buttons before the start up screen it never restarts again? please help!

Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, contact Apple.
Genius Bar reservation:
http://www.apple.com/retail/geniusbar/
Best.

Everytime I log back into my Macbook Pro the times is wrong for about 3-5 seconds before it corrects itself....

Does anyone know why everytime I log into my Macbook Pro the times is radomly wrong for about 3-5 seconds before it corrects itself. I have had the Mac for about 4 months and this only started about a month ago.....

Does anyone know why everytime I log into my Macbook Pro the times is radomly wrong for about 3-5 seconds before it corrects itself. I have had the Mac for about 4 months and this only started about a month ago.....

Advice about application structure before starting

Hi all,
I am so sorry for this longest post, but I have to explain all thing. Sorry again.
I have been studying with Labview for a year by myself without taking any professional support. When I get stuck in preparing my VIs, I always post here and you answered me with great patient. Thank you for all. Now, I am about to start a new VI and before starting it I thought it would be good to consult you on that.
The goal of this VI could be classified under 4 main topics: Acquisition, control, analysis, and recording the data. I am studying on a test system. There are two types of data to be acquired from the test system: pressure and temperature. For this purpose I have 1xNI 9203 (analog input-current) & 2xN9214(analog input-temperature). The test system is desired to be under control by use of a DC compressor with a frequency converter. To control that frequency converter I have to use NI 9263 (analog output- voltage). All hardware system is installed on NI 9188 cDAQ.
Before preparition of this system, I have coded a VI that acquire, analyse, and record the data-there is no use of NI 9263 (attached here). In this VI, I used a basic structure and it works fine. The only problem of this VI is delaying when the stop button is pressed. Anyway, now I want to prepare a new one. The difference of the new VI from the old one is that it controls the system while acquiring, analysing, and recording processes. And this control is supported by acquired pressure and temperature values. This will be my first big project and I need your suggesttions on structure of this VI. Do I start to build it with state machine architect or another ones? To prevent the data loss what kind of precautions could be taken?
Thank you all in advance.
Egemen
Attachments:
MAIN PROGRAM_v0.vi ‏147 KB

Egemen,
First, Great! It is very important to plan and design your program before starting to write it.
Next, you do not need to apologize for providing the information necessary for someone to respond to your request. We would very much prefer a post of several paragraphs which contains the relevant information to a brief post which only elicits questions for more details.
Now to your questions.
1. Look at the style guides. Your block diagram was several screens high and wide. It is recommended to keep the diagram to one screen. Paticularly in programs which will get large and copmlicated like yours, this readability constraint will be very worthwhile. Effective use of subVIs is one way to help minimize screen bloat.
2. Look at the style guides. The use of local variables to pass data from one loop to a parallel loop is not recommended. It can lead to race conditions, force execution of the loops in the UI thread, and is slower than wires.
3. Read the help on Event Structures. Only one event structure per VI is recommended. Although the way you have used them will probably work, it consumes hectares of block diagram space and may be vulnerable to problems when you or another developer decides to make a few changes.
4. Because there is no data dependency, it is possible (although not very likely) that the main loop could start running before the clear history property nodes execute.
5. How do your temperature charts know which waveform to display?
6. You stop on DAQ errors but do not check for file errors. You may want to consider more robust error handling.
Now, some general comments on program structure. You list 4 topics: Acquisition, control, analysis, and recording the data. This may also be a good way to think about program structure. The structure probably needs one more topic: User Interface. The program you posted essentially has 2 topics: User Inputs and everything else. Think about the timing requirements for each topic. User interface - needs to respond to user inputs in about 100 ms or the user begins to feel as though the program is not responding. Similarly, displays do not need to update more than a few times per second. Acquisition - Software timed. Default value = 1.67 Hz. Output not specified, but since you are talking pressure and temperature, it is probably slow also. Once you start doing closed loop control, it may become more important to keep the timing constant. Record data - same timing as acquisition. However, writing 8-64 channels of data two two files twice per second may not be optimum. And what happens when the OS finds that the files are fragmented and must allocate new sapce for the file and takes more than half a second to do so? Analysis - Your subVIs were not included so I have no idea what they do, how fast they may be and what effects they may have on the overall operation.
What I suggest is that you study the Producer/Consumer Design Patterns and State Machines. I think you may end up with 3 or 4 parallel loops. One will be the User Interface loop with the only event structure. Another will handle all the data acquisition (possibly including outputs when controlling your test system). This will be a state machine which initializes the DAQ, Reads and Writes, and shuts it down when finished. The File writes may be in a separate loop. If file I/O is put into a parallel loop, it should be a state machine which opens, writes, and closes the files and retains the file path or reference for repeated writes. The control and analysis (another state machine) may be in a separate loop or could run in the timeout case of the event structure in the UI loop. Which is best depends on details of your system.
With the amount of data you are moving around and the number of property nodes you need to use, learn to manipulate the front panel from a subVI. Search the Forum for posts on use of control references and on updating the main front panel from a subVI. There are some good methods posted.
Lynn

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