Hi,
I'm trying to create threads [pthread] to access a file which is
stored on pvfs2. Each thread seeks to a random position and reads
100KB of data and repeat this process m times. n is the thread count.
All of the threads operates on the same file. Here is the pseudo code:
main:
for 1 to n
create_pthread (thread_func);
for 1 to n
join_thread;
thread_func:
filesize=1GB
offset= rand (0 - 1GB)
pvfs_open ("/pvfs2/1GBfile");
for i to m
{
pvfs_lseek (offset);
pvfs_read (100K);
}
When I executed the programme with n=1 it works correctly. However
when n>1 I got the error:
===================================
[14:50:19.904834] critical BMI failure (null callback)
th: src/io/flow/flowproto-bmi-trove/flowproto-multiqueue.c:1701:
bmi_to_mem_callback_fn: Assertion `q_item->parent->state !=
FLOW_COMPLETE' failed.
Aborted
===================================
What may be the problem?
Thanks very much.
--
hamza
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