stack region


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users stack region
# 1  
stack region

how can i determine that
what percentage of stack region is currently is used?
(i am using tru64 unix)
# 2  
Most solutions are going to be very specific to the exact OS involved. Poking around on FC5, I see that Linux has this kind of info available in the /proc filesystem. Excerpt from "man 5 proc":
Code:
/proc/[number]/stat
              Status   information   about   the   process.    This   is   used   by   ps(1).    It   is   defined  in
              /usr/src/linux/fs/proc/array.c.

              The fields, in order, with their proper scanf(3) format specifiers, are:
              startstack %lu
                     The address of the start of the stack.

              kstkesp %lu
                     The current value of esp (stack pointer), as found in the kernel stack page for the process.

So maybe you can look at Tru64 to see if it has anything like that.

Here is a crazy idea that might work on any OS to get a good approximate value. Earlly in main() take the address of an auto variable and store the address for future reference. Later, when you want to check the stack size, allocate a new auto variable and now subtract the addresses and take the absolute value to get an approximate stack size.
# 3  
Code:
struct rlimit rlim;
getrlimit(RLIMIT_STACK, &rlim);
printf("STACK: cur - %ld max - %ld\n", rlim.rlim_cur, rlim.rlim_max);

rlim.rlim_cur shows current usage for the process. I think the OP wants all stack usage (across all processes), which I have no idea how to get. That would be totally internal to the kernel for each OS.

Last edited by jim mcnamara; 12-29-2006 at 11:23 AM..
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #565
Difficulty: Medium
The logical and operator is also called a conjunction.
True or False?

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Mean score value by ID over a defined genomic region

Hi, I would like to know how can I get a mean score value by ID over a defined genomic region. Here it is an example: file1 12 100 103 id1 12 110 112 id1 12 200 203 id2 file2 12 100 101 1 12 101 102 0.8 12 102 103 0.7 12 110 111 2.5 12 111 112 2.8 12 200 201 10.1 12 201 202... (7 Replies)
Discussion started by: fadista
7 Replies

2. Programming

Merge two strings by overlapped region

Hello, I am trying to concatenate two strings by merging the overlapped region. E.g. Seq1=ACGTGCCC Seq2=CCCCCGTGTGTGT Seq_merged=ACGTGCCCCCGTGTGTGTFunction strcat(char *dest, char *src) appends the src string to the dest string, ignoring the overlapped parts (prefix of src and suffix of dest).... (30 Replies)
Discussion started by: yifangt
30 Replies

3. Shell Programming and Scripting

Need a command to change the port region

portsuf=25 port=20925 I need to replace 09 with 25 It should be like 22525. Can some please help with command or script. (4 Replies)
Discussion started by: bhas85
4 Replies

4. AIX

Change lv REGION in HDISK1

Dears my rootvg is missed up i can not extend the /opt as soon as i try to extend the Filesystem its give me that there is not enough space . as there any way to change the REGION of the LVs in HDISK1 ? lspv -p hdisk0 hdisk0: PP RANGE STATE REGION LV NAME TYPE ... (8 Replies)
Discussion started by: thecobra151
8 Replies

5. Shell Programming and Scripting

Region between lines

How can I find the regions between specific lines? I have a file which contains lines like this: chr1 0 17388 0 chr1 17388 17444 1 chr1 17444 17599 2 chr1 17599 17601 1 chr1 17601 569791 0 chr1 569791 569795 1 chr1 569795 569808 2 chr1 569808 569890 3 chr1 569890 570047 4 ... (9 Replies)
Discussion started by: linseyr
9 Replies

6. UNIX for Dummies Questions & Answers

Kernel Stack vs User Mode Stack

Hi, I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by... (4 Replies)
Discussion started by: saurabhkoar
4 Replies

7. UNIX for Advanced & Expert Users

Best practice - determining what region you are on

Hello all, I have a question about what you think the best practice is to determine what region you are running on when you have a system setup with a DEV/TEST, QA, and PROD regions running the same scripts in all. So, when you run in DEV, you have a different directory structure, and you... (4 Replies)
Discussion started by: Rediranch
4 Replies

8. Programming

what is stack winding and stack unwinding

helo can u tell me what do you mean by stack winding and stack unwinding Regards, Amit (2 Replies)
Discussion started by: amitpansuria
2 Replies

Featured Tech Videos