pollsys then waits until the file can be read. The only possible cause is described above. This is POSIX compliant semantics for the read call. pollsys is a Solaris-ism (a system call entry point) for poll() and select(), I believe. Don Cragun would know definitely.
I'm a DBA so no abuse please! I've for 5 Oracle Forms processes that are spinning and am trying to find out if they're doing anything:
Running HPUX 11.11
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
9 ? 2735 oracle 241 20 24228K 16668K run 2607:29 84.92... (2 Replies)
Hi,
We keep getting hanging Oracle process for our ETL. The dba's asked me to do o truss. All I see is pages and pages of the following,:cool:
pollsys(0xFFFFFFFF7FFF38C8, 1, 0xFFFFFFFF7FFF3800, 0x00000000) = 0
pollsys(0xFFFFFFFF7FFF38C8, 1, 0xFFFFFFFF7FFF3800, 0x00000000) = 0... (0 Replies)
Hi all,
while trying to debug and figure out why a lofiadm command was not working on my script, i came across a cmd called "truss"
all i know about it is that it executes the specified command and produces a trace of the system calls it performs, the signals it receives, and the machine faults... (5 Replies)
Hi
I have to get redirect the truss ouput to file.
I am doing truss -p 12121 >> output.txt
But it still displays on the screen adn output.txt is empty
Can some help how to do this?
Thanks in advance
Ammu (1 Reply)
i have to gather some info about a process and redirect it to a1.txt file. For this i m using truss command
truss -po a1.txt $PID_Detail
where $PID_Detail= 1482944 3362976
--------------------------------------------------------------------------
Below the script:
#!/bin/ksh
for i... (6 Replies)
On my VIo I see the following for my disks:
$ lspath | grep hdisk6
Enabled hdisk6 fscsi0 200600a0b82193f7,4000000000000
Enabled hdisk6 fscsi0 200700a0b82193f7,4000000000000
Enabled hdisk6 fscsi2 200600a0b82193f8,4000000000000
Failed hdisk6 fscsi2 200700a0b82193f8,4000000000000
$ lspath |... (8 Replies)
Hello,
I'm using AIX 5.3.12.5 and trying to understand truss output.
I'm running a job with real time of 16 minutes but only 4 minutes of CPU time. I'm trying to understand what the process is doing.
I'm getting a lot of
kread,
kpread,
kwrite,
kpwrite...
localhost:~ x$ grep... (1 Reply)
Hi,
I want to trace a background java program which runs in infinite loop. I have used truss command for this.
But the program terminated after some hours with below truss output:
Received signal #1, SIGHUP, in lwp_cond_wait()
/1: siginfo: SIG#0
Please let me know what... (0 Replies)
Hi,
I want to trace a background java program which runs in infinite loop. I have used truss command for this.
But the program terminated after some hours with below truss output:
Received signal #1, SIGHUP, in lwp_cond_wait()
/1: siginfo: SIG#0
Please let me know what... (5 Replies)
Hi,
I am trying to set ulimit for soft stack unlimited, but this is not taking effect, after tracing the ulimit -a unlimited command, the below output was generated, which i am unable to comprehend. Could any one help me with this?
prcbap1-r10prod: truss -d ulimit -s unlimited
Tue Dec 30... (2 Replies)
Discussion started by: NasirAbbasi
2 Replies
LEARN ABOUT OSF1
pthread_rwlock_tryrdlock
pthread_rwlock_tryrdlock(3) Library Functions Manual pthread_rwlock_tryrdlock(3)NAME
pthread_rwlock_tryrdlock - Attempts to acquire a read-write lock for read access without waiting.
LIBRARY
DECthreads POSIX 1003.1c Library (libpthread.so)
SYNOPSIS
#include <pthread.h>
int pthread_rwlock_tryrdlock(
pthread_rwlock_t *rwlock);
PARAMETERS
Address of the read-write lock object to acquire for read access.
DESCRIPTION
This routine attempts to acquire a read-write lock for read access, but does not wait for the lock if it not immediately available.
If a thread already holds the lock for read access, the lock is granted and this routine returns. If no thread already holds the lock for
write access and there are no writers waiting to acquire the lock, the lock for read access is granted to the calling thread and this rou-
tine returns.
If some thread already holds the lock for write access, the calling thread will not acquire the read lock. Results are undefined if the
calling thread has already acquired a lock for write access on rwlock when this routine is called.
A thread can hold multiple, concurrent locks for read access on the same read-write lock. In a given thread, for each call to this routine
that successfully acquires the same read-write lock for read access, a corrresponding call to pthread_rwlock_unlock must be issued.
If the read-write lock object referenced by rwlock is not initialized, the results of calling this routine are undefined.
RETURN VALUES
If an error condition occurs, this routine returns an integer value indicating the type of error. Possible return values are as follows:
Successful completion. The read-write lock could not be acquired for read access because another thread already acquired it for write
access or is blocked and waiting for it for write access. The value specified by rwlock does not refer to an initialized read-write lock
object. The current thread already owns the read-write lock for writing. The lock for read access could not be acquired because the maxi-
mum number of read lock acquisitions for rwlock has been exceeded.
ERRORS
None
RELATED INFORMATION
Functions: pthread_rwlock_init(3), pthread_rwlockattr_init(3), pthread_rwlock_rdlock(3), pthread_rwlock_wrlock(3), pthread_rwlock_unlock(3)
Manuals: Guide to DECthreads and Programmer's Guide
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pthread_rwlock_tryrdlock(3)