Problem in CPU usage

Thread Tools Search this Thread
Top Forums Programming Problem in CPU usage
# 1  
Old 09-26-2007
Problem in CPU usage

Hi all,

I have C++ program that is running on linux on an ARM processor. The program is sending voice to a specific ip. When i started the program, 2 threads are running and sending voice over ip. Each of the threads are at %0.2 CPU usage which is very normal. My problem is, CPU usage is increasing hour by hour. After 10 hours it becomes %45 CPU usage for each of the threads which is very high. Because of this, the voice in both threads slows down, too. If i close both threads, and start new ones without closing the program, they start from beginning at %0.2 CPU usage. Why could it be? Where should i look?


Last edited by gokaytos; 09-26-2007 at 06:38 PM.. Reason: Spelling Correction
# 2  
Old 09-27-2007
Maybe more threads are openning in the runtime?
# 3  
Old 09-27-2007
Only a guess, but given that it grows over time it could be that you have some kind of list or array-like entity that is growing without reasonable bound, and it is simply taking more CPU cycles to process the growing amount of data. It could be worthwhile to see if memory usage is also growing over time.
# 4  
Old 09-27-2007
Originally Posted by gokaytos
Where should i look?
Sounds like a memory leakage thing, basically more news than deletes.

Or lists growing and not havings items removed.
# 5  
Old 10-09-2007
With the information provided I think the best you're going to get are guesses. Might be worth taking a look at a good logging utility like log4c. You have the ability to pass all sorts of objects like arrays and vectors to it and it will display the contents of them giving you an easy overview of if their contents is growing. Adding some lines of debug code at various points in your code is another obvious solution.

You mention CPU usage increasing. Does memory usage also increase too? If so think about implimenting a Memory Printer class that peridocially prints the used/available memory.

Another thought, and one I've come across quite a bit within my own company, is your program talking to some sort of database? Is it performing read and writes to a specific table that is getting bigger and bigger. If you have a thread that is querying a table at a given interval then obviously the more rows in the table you have the poorer the performance of your application will become, well without proper indexing anyway.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. AIX

Problem with nmon, actual CPU usage per process

Hi all, I am currently having trouble to get nmon to print me the actual CPU usage for an interval for a process. According to the manual, something like # time nmon -t -C cron -s 5 -c 2 -F outfile real 0m0.98s user 0m0.03s sys 0m0.04s should print out at least the process... (15 Replies)
Discussion started by: zaxxon
15 Replies

2. AIX

Overall CPU Usage

Hi Guys, I am a newbie on the forum. This is my first post, so first of all I would like to introduce myself. I am a SAS Analyst programmer working for an Health Insurance client. SAS is installed on a 16 CPU AIX Server with partitions running with shared processor. I have couple of... (2 Replies)
Discussion started by: saurabhiim2003
2 Replies

3. Programming

CPU usage

Hi all, I'm using python and psutil a library to get system informations like cpu usage (percent) for a given process. My question is if I have the value in % of the cpu usage how I could get the cpu usage in cycle number I mean not in percent? Thanks a lot D. (5 Replies)
Discussion started by: Dedalus
5 Replies

4. AIX

How to monitor the IBM AIX server for I/O usage,memory usage,CPU usage,network..?

How to monitor the IBM AIX server for I/O usage, memory usage, CPU usage, network usage, storage usage? (3 Replies)
Discussion started by: laknar
3 Replies

5. Solaris

Multi CPU Solaris system shows 100% CPU usage.

Hello Friends, On one of my Solaris 10 box, CPU usage shows 100% using "sar", "vmstat". However, it has 4 CPUs and prstat and glance are not showing enough processes to justify high CPU utilization. ========================================================================= $ prstat -a ... (4 Replies)
Discussion started by: mahive
4 Replies

6. Solaris

current CPU usage, memory usage, disk I/O oid(snmp)

Hi, I want to monitor the current cpu usage, monitor usage , disk I/o and network utlization for solaris using SNMP. I want the oids for above tasks. can you please tell me that Thank you (2 Replies)
Discussion started by: S_venkatesh
2 Replies

7. HP-UX

how can I find cpu usage memory usage swap usage and logical volume usage

how can I find cpu usage memory usage swap usage and I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times my final destination is monitor process logical volume usage above X % and number of Logical voluage above can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies

8. Programming

CPU usage and memory usage

Please tell me solaris functions/api for getting following information 1- Function that tells how much memory used by current process 2- Function that tells how much memory used by all running processes 3- Function that tells how much CPU is used by current process 4- Function that tells how... (1 Reply)
Discussion started by: mansoorulhaq
1 Replies

9. Shell Programming and Scripting

Getting CPU Usage

For analysis, I need to gather CPU usage from say 1:00 PM to 2:00 PM every 10 seconds on a given day. I heard this can be done with awk, but my UNIX is kind of rusty. (4 Replies)
Discussion started by: WG1
4 Replies

10. Programming

Monitor CPU usage and Memory Usage

how can i monitor usages of CPU, Memory, Hard disk etc. under SUN Solaries through a c program or java program i want to store that data into database so i can show it graphically thanks in advance (2 Replies)
Discussion started by: Gajanad Bihani
2 Replies
Login or Register to Ask a Question