02-06-2013
Thanks Venam,
I feel creating a new thread for each thread in focus, would be a bad idea. I am thinking of using time() system call to measure time differences. There should not be any race conditions among the threads, in calling time().
However, once measurement is taken, there is a race condition when multiple threads trying to log. Using semaphore will in turn will create bottleneck.
I am not familiar with syslog(). Can that be useful here?
/Tamil
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Does anyone know what's new with Efficient dispatching in the Solaris 2.8 release (vs Solaris 2.6) release?
Specifically, does anyone know of a good website to get detailed information on thread dispatching using efficient dispatching in solaris 2.8?
Thank you. (1 Reply)
Discussion started by: uchachra
1 Replies
2. Shell Programming and Scripting
I'm using korn shell to connect to oracle, retrieve certain values, put them in a list, and iterate through them. While this method works, I can't help but think there is an easier method.
If you know of one, please suggest a shorter, more efficient method.
############### FUNCTIONS ... (6 Replies)
Discussion started by: SelectSplat
6 Replies
3. Shell Programming and Scripting
Hi,
Can someone let me know if the below AWK can be made much simpler / efficient ?
I have 200 fields, I need to substr only the last fields.
So i'm printing awk -F~ 'print {$1, $2, $3....................................$196,$197 , susbstr($198,1,3999), substr($199,1,3999)..}'
Is there a... (4 Replies)
Discussion started by: braindrain
4 Replies
4. Shell Programming and Scripting
Hi
I have the following at the end of a service shutdown script used in part of an active-passive failover setup:
###
# Shutdown all primary Network Interfaces
# associated with failover
###
# get interface names based on IP's
# and shut them down to simulate loss of
# heartbeatd
... (1 Reply)
Discussion started by: mikie
1 Replies
5. Shell Programming and Scripting
I have the following code.
printf "Test Message Report" > report.txt
while read line
do
msgid=$(printf "%n" "$line" | cut -c1-6000| sed -e 's///g' -e 's|.*ex:Msg\(.*\)ex:Msg.*|\1|')
putdate=$(printf "%n" "$line" | cut -c1-6000| sed -e 's///g' -e 's|.*PutDate\(.*\)PutTime.*|\1|')... (9 Replies)
Discussion started by: gugs
9 Replies
6. UNIX for Advanced & Expert Users
some of the data i receive has been typed in manually due to which there are often places where i find 8 instead of ( and the incorrect use of case
what according to you is the best way to correct such data.
The data has around 20,000 records.
The value i want to change is in the 4th field.... (2 Replies)
Discussion started by: VGR
2 Replies
7. Post Here to Contact Site Administrators and Moderators
Hi Everyone. First, I want to thank all of you for letting me participate in this great group.
I am having a bit of a problem.
After I get an email from a responder, I login to make my reply.
In the mean time I get another response by email from another member, I go to reply to them and I... (6 Replies)
Discussion started by: Ccccc
6 Replies
8. UNIX for Advanced & Expert Users
Hi Experts,
I've been trying simple grep to search for a string in a huge number of files in a directory.
grep <pattern> *
this gives the search results as well as the following -
grep: <filename>: Permission denied
grep: <filename>: Permission denied
for files which I don't have... (4 Replies)
Discussion started by: sumoka
4 Replies
9. Shell Programming and Scripting
Hello guys
My requirement is to read a file with parent-child relationship
we need to iterate through each row to find its latest child.
for eg. parent child
ABC PQR
PQR DEF
DEF XYZ
Expected Output
ABC XYZ
PQR XYZ
DEF XYZ
Script Logic :
read parent from file
seach child... (4 Replies)
Discussion started by: joshiamit
4 Replies
10. Linux
When unlocking a Linux server's console there's no event indicating successful logging
Is there a way I can fix this ?
I have the following in my rsyslog.conf
auth.info /var/log/secure
authpriv.info /var/log/secure (1 Reply)
Discussion started by: walterthered
1 Replies
LEARN ABOUT OPENSOLARIS
sem_post
sem_post(3C) Standard C Library Functions sem_post(3C)
NAME
sem_post - increment the count of a semaphore
SYNOPSIS
#include <semaphore.h>
int sem_post(sem_t *sem);
DESCRIPTION
The sem_post() function unlocks the semaphore referenced by sem by performing a semaphore unlock operation on that semaphore.
If the semaphore value resulting from this operation is positive, then no threads were blocked waiting for the semaphore to become
unlocked; the semaphore value is simply incremented.
If the value of the semaphore resulting from this operation is 0, then one of the threads blocked waiting for the semaphore will be
allowed to return successfully from its call to sem_wait(3C). If the symbol _POSIX_PRIORITY_SCHEDULING is defined, the thread to be
unblocked will be chosen in a manner appropriate to the scheduling policies and parameters in effect for the blocked threads. In the case
of the schedulers SCHED_FIFO and SCHED_RR, the highest priority waiting thread will be unblocked, and if there is more than one highest
priority thread blocked waiting for the semaphore, then the highest priority thread that has been waiting the longest will be unblocked.
If the symbol _POSIX_PRIORITY_SCHEDULING is not defined, the choice of a thread to unblock is unspecified.
RETURN VALUES
If successful, sem_post() returns 0; otherwise it returns -1 and sets errno to indicate the error.
ERRORS
The sem_post() function will fail if:
EINVAL The sem argument does not refer to a valid semaphore.
ENOSYS The sem_post() function is not supported by the system.
EOVERFLOW The semaphore value exceeds SEM_VALUE_MAX.
USAGE
The sem_post() function is reentrant with respect to signals and may be invoked from a signal-catching function. The semaphore functional-
ity described on this manual page is for the POSIX (see standards(5)) threads implementation. For the documentation of the Solaris threads
interface, see semaphore(3C)).
EXAMPLES
See sem_wait(3C).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
|Standard |See standards(5). |
+-----------------------------+-----------------------------+
SEE ALSO
sched_setscheduler(3C), sem_wait(3C), semaphore(3C), attributes(5), standards(5)
SunOS 5.11 5 Feb 2008 sem_post(3C)