glusterfs.git/xlators/performance/io-threads/src, branch 2.0.0rc6

Add return after STACK_UNWIND

2009-03-18T05:37:07+00:00

We must add a 'return' after a STACK_UNWIND due to a stub creation
failure, because if we dont, we'll end up adding a NULL stub to the
worker thread request queue.

Signed-off-by: Anand V. Avati

IO-threads Cleanup: Remove useless data structures.

2009-03-17T11:47:58+00:00

Signed-off-by: Anand V. Avati

IO-threads Cleanup: Clean-up request scheduling and queueing interface.

2009-03-17T11:47:53+00:00

This patch does two things:

1. Cleans up the request scheduling and queueing interface so that all
fops only need to call iot_schedule and not iot_queue and in some
cases iot_schedule.

2. Till now, we've had open and create calls go through the main
glusterfsd thread when sending open and create fops. This patch makes
them also go through the worker threads. But since the open and
creates requests would not be called with a valid inode number in the
loc_t, these requests will get assigned to the worker at index 0.
This will be fixed RSN, when we introduce various techniques of
distributing the inodes(..not requests..) over the worker threads.

Signed-off-by: Anand V. Avati

IO-threads Cleanup: Change workers list to dynamically allocated array

2009-03-17T11:47:49+00:00

Worker threads were represented as a list in iot_conf_t
which made us traverse the list of workers in order to
decide which thread gets the request. Now we represent the
workers as a dynamically allocated array so that we can just index
into the array to schedule the file.

Signed-off-by: Anand V. Avati

IO-threads Cleanup: Change request queue into a struct list_head

2009-03-17T11:46:46+00:00

This patch changes the per-thread request queue from a custom circular
linked list, into the standard list.h list which is easier to
understand and has a cleaner interface.

Signed-off-by: Anand V. Avati

updated copyright header to extend copyright upto 2009

2009-02-26T16:48:46+00:00

updated copyright header to include 2009.

Signed-off-by: Anand V. Avati

RE-SEND: Add braces around critical sections.

2009-02-23T14:04:02+00:00

Signed-off-by: Anand V. Avati

Reduce iothreads requests queue lock granularity.

2009-02-19T15:08:38+00:00

iot_queue() and iot_dequeue() functions were using a io-threads
translator-wide lock which would be contended for by every worker
thread waiting for IO requests.

This patch reduces the granularity by turning the
lock into a per-worker lock.

Signed-off-by: Anand V. Avati

Remove conf->cache_size checks

2009-02-19T15:08:30+00:00

Since we're not dependent on this io-thread internal state(i.e.
cache_size and current_size) to rate limit requests, we can remove
these two data members and code that checks for these.

Signed-off-by: Anand V. Avati

Remove dead code.

2009-02-19T15:08:22+00:00

Signed-off-by: Anand V. Avati