09-19-2008
I compiled and run the loop test code posted by Otheus.
Xeon/SCO results: 555555.56 semop/s [0,0]
Xeon/Linux results: 128205.13 semop/s [0,0]
I don't have access to PIII box right now, but as results are same (proportionally) as what I saw in my test I think it is not crucial not to have PIII results here.
As far as overhead mentioned by Era - I am aware of it, as it is closely resembles situation that I am evaluating, so it a valid test and not an oversight.
So, does anyone have any idea what the bottleneck could be? or where to look? I really appreciate your patience with me and your persistence in getting to the bottom of it.
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi, is there any command where we can monitor semaphores? (1 Reply)
Discussion started by: yls177
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I'm new to UNIX.
I need to know what's a semaphore
Do reply.
Thanks
VJ (3 Replies)
Discussion started by: vjsony
3 Replies
3. Filesystems, Disks and Memory
Hello,
I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info:
RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!!
Regards :)... (0 Replies)
Discussion started by: Santi
0 Replies
4. Shell Programming and Scripting
Hi,
I am looking to use a semaphore for the first time in one of my scripts. I am just wondering if there are any simple examples or tutorials around?
I am a beginner so the simpler the better :)
Thanks
-Jaken (2 Replies)
Discussion started by: Jaken
2 Replies
5. UNIX for Dummies Questions & Answers
what is semaphore? can any body explain it in a more simple way than the manual ??
replies appreciated
Regards
raguram R (7 Replies)
Discussion started by: raguramtgr
7 Replies
6. Filesystems, Disks and Memory
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
Discussion started by: W.C.C
1 Replies
7. Shell Programming and Scripting
Control two exclusively shared resources(semaphore). The two resources are two files. The producer will write even numbers to one file, and odd numbers to another one. The consumer respectively reads from each file until it gets 5 even numbers and 5 odd numbers.
Can any one help me with the... (0 Replies)
Discussion started by: gokult
0 Replies
8. Programming
If I create a semaphore and then I fork a number of child processes then all the child process use that same semaphore.
Since the process address spaces are different rfom each other then how all the child process are able to access the same semaphore?
I understand that semaphore/mutex is at os... (0 Replies)
Discussion started by: rupeshkp728
0 Replies
9. UNIX for Beginners Questions & Answers
I was asked to add this piece of code to a c program which I will execute through the shell:
for(long i = 0; i < NITER; i++)
{ sem_wait( &sema);
count++;
sem_post( &sema); }
I didn't get it, which is the critical section ? if it's "count++" how would a thread wake up in order to enter it... (1 Reply)
Discussion started by: uniran
1 Replies
LEARN ABOUT NETBSD
atf-test-program
ATF-TEST-PROGRAM(1) BSD General Commands Manual ATF-TEST-PROGRAM(1)
NAME
atf-test-program -- common interface to ATF test programs
SYNOPSIS
atf-test-program [-r resfile] [-s srcdir] [-v var1=value1 [.. -v varN=valueN]] test_case
atf-test-program -l
DESCRIPTION
Test programs written using the ATF libraries all share a common user interface, which is what this manual page describes. NOTE: There is no
binary known as atf-test-program; what is described in this manual page is the command-line interface exposed by the atf-c, atf-c++ and
atf-sh bindings.
In the first synopsis form, the test program will execute the provided test case and print its results to the standard output, unless other-
wise stated by the -r flag. Optionally, the test case name can be suffixed by ':cleanup', in which case the cleanup routine of the test case
will be executed instead of the test case body; see atf-test-case(4). Note that the test case is executed without isolation, so it can and
probably will create and modify files in the current directory. To execute test cases in a controller manner, refer to atf-run(1), which is
the preferred way to run test cases. You should only execute test cases by hand for debugging purposes.
In the second synopsis form, the test program will list all available test cases alongside their meta-data properties in a format that is
machine parseable. This list is processed by atf-run(1) to know how to execute the test cases of a given test program.
The following options are available:
-l Lists available test cases alongside a brief description for each of them.
-r resfile Specifies the file that will receive the test case result. If not specified, the test case prints its results to stdout. If
the result of a test case needs to be parsed by another program, you must use this option to redirect the result to a file
and then read the resulting file from the other program. Note: do not try to process the stdout of the test case because
your program may break in the future.
-s srcdir The path to the directory where the test program is located. This is needed in all cases, except when the test program is
being executed from the current directory. The test program will use this path to locate any helper data files or utilities.
-v var=value Sets the configuration variable var to the value value.
SEE ALSO
atf-run(1), atf(7)
BSD
February 6, 2011 BSD