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* performance/io-threads: Introduce new priority and priority-thread-limitsPranith Kumar K2011-08-311-0/+3
| | | | | | | | | Change-Id: I7b4e7c467b833bc5896808e6e1d1b1a0322c4fdb BUG: 3483 Reviewed-on: http://review.gluster.com/318 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Amar Tumballi <amar@gluster.com> Reviewed-by: Vijay Bellur <vijay@gluster.com>
* Change Copyright current yearPranith Kumar K2011-08-101-1/+1
| | | | | | | | Change-Id: I2d10f2be44f518f496427f257988f1858e888084 BUG: 3348 Reviewed-on: http://review.gluster.com/200 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@gluster.com>
* LICENSE: s/GNU Affero General Public/GNU General Public/Pranith Kumar K2011-08-061-3/+3
| | | | | | | | Change-Id: I3914467611e573cccee0d22df93920cf1b2eb79f BUG: 3348 Reviewed-on: http://review.gluster.com/182 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@gluster.com>
* io-threads: implement bulk and priority queuesAnand Avati2011-02-221-1/+10
| | | | | | | | Signed-off-by: Anand Avati <avati@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 2241 (GlusterFs Stat Actions Degrade During I/O) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2241
* Remove the hard-coded thread-count option in volgenKaushik BV2010-11-071-1/+1
| | | | | | | | Signed-off-by: Kaushik BV <kaushikbv@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 1159 () URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1159
* Copyright changesVijay Bellur2010-10-111-1/+1
| | | | | | | | Signed-off-by: Vijay Bellur <vijay@gluster.com> Signed-off-by: Vijay Bellur <vijay@dev.gluster.com> BUG: 971 (dynamic volume management) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971
* Change GNU GPL to GNU AGPLPranith K2010-10-041-3/+3
| | | | | | | | Signed-off-by: Pranith Kumar K <pranithk@gluster.com> Signed-off-by: Vijay Bellur <vijay@dev.gluster.com> BUG: 1388 () URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1388
* Memory accounting changesVijay Bellur2010-04-231-0/+1
| | | | | | | | | | | Memory accounting Changes. Thanks to Vinayak Hegde and Csaba Henk for their contributions. Signed-off-by: Vijay Bellur <vijay@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 329 (Replacing memory allocation functions with mem-type functions) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=329
* io-threads: more fixesAnand Avati2010-02-271-1/+1
| | | | | | | | | | | | * conditional for scaling up threads was wrong * ETIMEDOUT check was performed wrongly Signed-off-by: Anand V. Avati <avati@blackhole.gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 583 (filesystem access hangs while deleting large files) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=583
* io-threads: single queue/multi-thread modelAnand Avati2010-02-221-120/+14
| | | | | | | | | | | | | | | | | | This patch lets io-threads work with a single queue and multiple threads work on picking the next request from the queue and process it. Whenever the number of pending requests in the queue double, a new worker thread is spawned. Workers expire after a (configurable) timeout of inactivity Signed-off-by: Anand V. Avati <avati@amp.gluster.com> Signed-off-by: Anand V. Avati <avati@blackhole.gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 583 (filesystem access hangs while deleting large files) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=583
* Changed occurrences of Z Research to Gluster.Vijay Bellur2009-10-071-1/+1
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Fix missed notification in sem_timedwaitShehjar Tikoo2009-06-111-2/+2
| | | | | | | | | | | | | | | We're performing a calculation for skewing idle time that resulted in a timespec.tv_nsec value becoming larger than 1000 million or less than 0, forcing sem_timedwait to return with an EINVAL instead of waiting for a request notification from sem_post in iot_notify_worker(). This resulted in a missed notification that resulted in a hang followed by a timeout on the protocol/client side. This commit avoids the over- and under-flow in tv_nsec by skewing the tv_sec value instead. Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Change mutexes/condvars to spinlocks/semaphoresShehjar Tikoo2009-05-201-2/+8
| | | | | | | | | | | | | | | | | It seems that use of mutexes is resulting in pretty high thread sleep and wake-up cost. What is worse, if a worker thread has acquired a lock, there is a possibility of the main glusterfs thread being put to sleep. We change the use of mutexes into spinlock. At the same time, we cannot anymore use condvars for notification since the condvar interface depends on mutexes itself. Semaphores come to out rescue. Luckily, even the pthread semaphores have a timedwait interface to allow our idle worker threads to make an exit decision. Further, it is possible that spinlocks are not available on all systems so all this is curtained behind #defines so we can fall back to mutexes and condvars implementation. Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Reduce default max for threads to 64Shehjar Tikoo2009-05-201-1/+1
| | | | | | | | | We've had complaints from users who've used autoscaling option with default settings for min and max threads, about high memory consumption because of the large default value for max-threads. Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Support mem-pool allocator for iot_request_tShehjar Tikoo2009-05-201-0/+15
| | | | | | | | | | | | | | | | This commit brings in support for allocation of iot_request_t's in io-threads through the use of the mem-pool. We're hoping that the overheads of hundreds and thousands of small allocations can be avoided through this. The important point to note is that the memory pool is not for the translator as a whole but there is one small memory pool for each worker thread. Not only does that help us avoid malloc overheads for small allocations like iot_request_t but also avoid contention on the heap data structures when multiple threads want an iot_request_t from the pool. Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Add graceful shutdown of worker threadsRaghavendra G2009-05-201-3/+6
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* io-threads: Clarify thread count rangeShehjar Tikoo2009-05-051-1/+2
| | | | | | | | | | | | | | | This patch cleans up io-threads behaviour regarding the range values that can be specified for min-threads and max-threads. THe major change is that the min threads have been reduced to 2 to signify that io-threads needs minimum two threads for its operation, while keeping the default number of threads at 16. The idea is to decouple the default thread count from the minimum thread count. Note to Avati: This applies over Raghu's indentation and logging take-3 patch. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: indentation and logging fixesRaghavendra G2009-05-051-86/+95
| | | | Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Reduce default min and max threadsShehjar Tikoo2009-04-101-2/+2
| | | | | | | | Going by the memory usage for each threads, it is prudent to have lower number of threads by default and let users who understand the memory consequences increase the thread count for themselves. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Use non-default thread stack sizeShehjar Tikoo2009-04-101-0/+6
| | | | | | | | The default stack size on Linux is around 8 MiB for each thread. This is clearly too high for our purpose. This commit reduces the stack size down to 1 MiB. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Support autoscaling volfile optionsShehjar Tikoo2009-04-021-4/+4
| | | | | | | | | | | | | | | | | This commit finally makes the autoscaling feature visible to the user. Know that we're now using two separate thread-pools, one for data requests, called ordered thread-pool in io-threads, and the other for meta-data requests, called un-ordered thread-pool. We do not expose this information to the user to keep io-threads simple. Consequently, when the user specifies a min-threads and max-threads value, the number of threads assigned to each pool is equal, i.e. both pools start with their min threads set to half of the option "min-threads" and both scale up their threads at most up to half of option "max-threads". Volfile options will be added to the wiki and user-guide. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Allow scaling to be switched offShehjar Tikoo2009-04-021-1/+18
| | | | | | | | The default is also to provide no scaling. For both, ordered and unordered request pools, when scaling is off, we maintain atleast the minimum number of threads specified in the volfile. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Add ordered threadpool state and codeShehjar Tikoo2009-04-021-0/+20
| | | | | | | | | | | Now we have the remaining fops going through the ordered thread-pool. To route a request through ordered thread, we use iot_schedule_ordered(..) and the worker thread for ordered requests is iot_worker_ordered(..) Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* io-threads: Add un-ordered thread-pool.Shehjar Tikoo2009-04-021-0/+33
| | | | | | | | | | | | | | | | | | This commit adds everything needed to: a. Get un-ordered request going through the un-ordered thread-pool. This happens through, the iot_schedule_unordered(..). The unordered thread-pool consists of thread running the iot_worker_unordered(..) function. b. Make threads in the un-ordered thread pool start-up and exit depending on the thread state. Note that at this point the requests that need ordering are still going through iot_schedule(..). Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* IO-threads Cleanup: Remove useless data structures.Shehjar Tikoo2009-03-171-22/+0
| | | | Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* IO-threads Cleanup: Change workers list to dynamically allocated arrayShehjar Tikoo2009-03-171-2/+1
| | | | | | | | | | 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 <avati@amp.gluster.com>
* IO-threads Cleanup: Change request queue into a struct list_headShehjar Tikoo2009-03-171-5/+8
| | | | | | | | 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 <avati@amp.gluster.com>
* updated copyright header to extend copyright upto 2009Basavanagowda Kanur2009-02-261-1/+1
| | | | | | updated copyright header to include 2009. Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
* Reduce iothreads requests queue lock granularity.Shehjar Tikoo2009-02-191-1/+1
| | | | | | | | | | | 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 <avati@dev.gluster.com>
* Remove conf->cache_size checksShehjar Tikoo2009-02-191-2/+0
| | | | | | | | 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 <avati@dev.gluster.com>
* Remove dead code.Shehjar Tikoo2009-02-191-7/+0
| | | | Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
* Added all filesVikas Gorur2009-02-181-0/+99
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