Does allowing more prims in region hurt performance even if they aren't used?

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Does allowing more prims in region hurt performance even if they aren't used?

Post by Lunk Portal »

If there are two regions, and one has a 15,000 prim limit, and another has a 45,000 prim limit, does the system "reserve" memory for the prims even if they aren't used?

Would the region with a 15K limit perform better than the 45k limit even if both have the same number of used prims?

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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Ilan Tochner »

Hi Lunk,

The prim quota itself won't change your world's performance, what matters is what is actually used. Even if the server used a very inefficient data structure the addition of 30,000 unused prims would still only increase RAM usage by a few megabytes.
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Gusher Castaignede »

Opensim doesn't even support multi-core, no matter how many more prims you add it's still stuck at one core...
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Koshari Mahana »

Hi Gusher, Can you explain? I'm not sure what you mean. Thanks!
Gusher Castaignede wrote:
Fri Feb 11, 2022 10:41 pm
Opensim doesn't even support multi-core, no matter how many more prims you add it's still stuck at one core...
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Graham Mills »

Koshari Mahana wrote:
Mon Mar 21, 2022 3:52 am
Hi Gusher, Can you explain? I'm not sure what you mean. Thanks!
Gusher Castaignede wrote:
Fri Feb 11, 2022 10:41 pm
Opensim doesn't even support multi-core, no matter how many more prims you add it's still stuck at one core...
I assume he's referring to this https://en.wikipedia.org/wiki/Multi-core_processor
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Koshari Mahana »

.
Thank you Graham!

When I look at my task manager it just shows the processes running in total, it doesn't show which are running on each core (at least that I can see). Is there away to find this out? I'm running Windows 10.

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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Graham Mills »

Not that I'm aware of. You can display activity on each of the logical processors (on my laptop I have two cores and each has two logical processors) by switching to the Performance tab, rightclicking the charts and choosing Change graph to: Logical processors. Quite how useful that is is another matter...
Koshari Mahana wrote:
Mon Mar 21, 2022 11:14 pm
.
Thank you Graham!

When I look at my task manager it just shows the processes running in total, it doesn't show which are running on each core (at least that I can see). Is there away to find this out? I'm running Windows 10.

Thanks!
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Koshari Mahana »

Thanks!
Graham Mills wrote:
Tue Mar 22, 2022 1:54 pm
Not that I'm aware of. You can display activity on each of the logical processors (on my laptop I have two cores and each has two logical processors) by switching to the Performance tab, rightclicking the charts and choosing Change graph to: Logical processors. Quite how useful that is is another matter...
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Re: Does allowing more prims in region hurt performance even if they aren't used?

Post by Shandon Loring »

Here's this little gadget that shows all CPU, Core, and HT usage..
http://win10gadgets.com/all-cpu-meter-2/

I have dual Hex-core processors, all running Hyperthread, so I see 24 'cores' in the above gadget.

When running Kitely and flying about or whatever, I see, for example, two 'cores' doing all the primary work.
In this case it is Core1 & Core7, so I'm assuming Core1 is real, and Core7 is just HT

If I run SL concurrently is a separate window then two different 'cores' get all busy!
In this case it is Core3 & Core8
Again I assume it is a actual core and an HT instance.

I have no real interpretation of what's going on, and this is all anecdotal of course.... just observations I thought I'd offer in case of any value to anyone.
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