So how fast can we go?

Message boards : Number crunching : So how fast can we go?
Message board moderation

To post messages, you must log in.

AuthorMessage
Profile Janus
Volunteer moderator
Project administrator
Avatar

Send message
Joined: 16 Jun 04
Posts: 4568
Credit: 2,100,409
RAC: 83
Message 1551 - Posted: 12 Aug 2005, 9:01:59 UTC
Last modified: 12 Aug 2005, 9:08:54 UTC

I have been doing tests to try to establish what the maximum achievable renderspeed is.
The theoretical maximum speed when doing splitframe rendering is limited by the main server and is exactly 15 frames per minute (equaling 135 workunits at a splitting setting of 9. With 5 times redundancy that is 675 rendered parts per minute - or a constant ingoing flow of 27Mbit of data). In reality this is limited by the network speed at the main server so it may be closer to 1 frame/min.
The reason for the 15 frames/min limit is that the stitcher that combines the rendered parts needs 4 secs to stitch each frame.

A higher framerate is achievable for frames that do not need splitframe rendering. In this case the only limiting factor is how fast the frame is rendered on the client. With the current network setup we should be able to get speeds close to 20 frames per minute max.

In other words it is quite important not to use splitframe rendering for quick sessions that wouldn't use too much time rendering. And it is quite important to use splitframe rendering when session would use a lot of time rendering. (seems logical, but now it has been tested and confirmed)

---

So what is the fastest we have gone so far?
Well, last session (135) we reached a point where a full frame was returned every 5 mins. In average a full frame was returned every 20 mins. So we aren't even near the theoretical limits yet.
BUT: Session 135 was speed limited. Just as any of the sessions prior to that. The reason why we have been speedlimiting so far is described in this thread.
As soon as all the mirror-stuff is ready we will be seeing some dramatic increases in renderspeed.
ID: 1551 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile Peter M. Nielsen
Project donor

Send message
Joined: 14 Mar 05
Posts: 130
Credit: 307
RAC: 0
Message 1552 - Posted: 12 Aug 2005, 10:31:56 UTC - in response to Message 1551.  

So what is the next step of the project - waiting for the boinc-modifications to the db or mirror-stuff?

- Peter

ID: 1552 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile Janus
Volunteer moderator
Project administrator
Avatar

Send message
Joined: 16 Jun 04
Posts: 4568
Credit: 2,100,409
RAC: 83
Message 1559 - Posted: 13 Aug 2005, 7:55:01 UTC - in response to Message 1552.  

Both really, but the memory upgrade Tuesday will give us a little more time before it is necesary to have fully optimal database queries. In fact the changes made so far should do it at least for quite a while with the extra memory.
For the past 4 days I have been working on an online mirror-setup guide that should make it easy to install and register the mirror software on almost any running apache+php configuration.

There's an interesting secret java project called CATS going on as well (you'll know more when the other dev working on it decides to release some info about it).
ID: 1559 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile AndyK
Project donor
Avatar

Send message
Joined: 2 Apr 05
Posts: 137
Credit: 20,063
RAC: 0
Message 1562 - Posted: 13 Aug 2005, 12:46:44 UTC - in response to Message 1559.  

Both really, but the memory upgrade Tuesday will give us a little more time before it is necesary to have fully optimal database queries. In fact the changes made so far should do it at least for quite a while with the extra memory.


That means we will have another testsession on Wednesday or so?

Andy
ID: 1562 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote
Profile Janus
Volunteer moderator
Project administrator
Avatar

Send message
Joined: 16 Jun 04
Posts: 4568
Credit: 2,100,409
RAC: 83
Message 1563 - Posted: 13 Aug 2005, 21:18:14 UTC

Very possibly.
ID: 1563 · Rating: 0 · rate: Rate + / Rate - Report as offensive     Reply Quote

Message boards : Number crunching : So how fast can we go?