[#SVC-3628] Downloading a single texture takes too long

2. Second Life Service - SVC

Downloading a single texture takes too long

Created: 06/Jan/09 05:32 PM Updated: 27/Jan/09 07:55 PM

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Component/s:

Performance

Affects Version/s:

1.24 Server

Fix Version/s:

None

File Attachments:

sample.tga (768 kB)

Issue Links:

Relates

This issue Relates to:

VWR-8503 Meta-Issue: Poor texture loading and freezes indicate larger chain of bugs

This issue is related to by:

VWR-11425 Textures Uploaded Through libsl/libomv Sometimes Take 10+ Minutes To Download

Linden Lab Issue ID:	DEV-19402
Linden Lab Internal Branch:	viewer_1-22

Description

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Repro:
1) Upload the attached sample.tga several times.
2) Clear your cache, relog, go to a different region.
3) Open Client > Consoles > Texture Console
4) Open sample.tga from your textures folder.
5) Time how long it takes to download completely.

Observe: The fuzzy 128x128 version usually downloads quickly, then nothing downloads for the next 15 seconds, then the rest of the image downloads in 3 seconds.
About 15% of the time 512x512 images take ~37 seconds to download.
About 80% of the time 512x512 images take ~20 seconds to download
About 5% of the time 512x512 images take ~4 seconds to download
The aliasing on these results indicates we're hitting some timeouts. What timeouts are we hitting and why?

Note: I'm on a 1.5Mbit DSL line. I'm interested to hear if the results are the same in the office.

Expected: If these textures can take as little as 5 seconds, we should try make them always take 5 seconds.

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Comments

Change History

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Moon Metty added a comment - 07/Jan/09 01:06 PM

Using a homemade texture-organizer, I can see textures are stuck in the state "SIM" (for 20 seconds or even minutes).

Turning the camera gives the same result: Many textures stuck on "SIM", and some refuse to load fully for a very long time.

According to http://wiki.secondlife.com/wiki/Texture_Console "SIM" means: "Waiting for packet data from simulator".

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Second Life 1.22.5 (106939) Dec 30 2008 14:32:14 (Second Life Public Nightly)
You are at 251726.7, 246606.6, 500.6 in Neptune located at sim4319.agni.lindenlab.com (63.210.157.223:13001)
Second Life Server 1.24.10.106829

CPU: Intel Core 2 Series Processor (2401 MHz)
Memory: 2048 MB
OS Version: Microsoft Windows XP Service Pack 3 (Build 2600)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 7600 GS/PCI/SSE2
OpenGL Version: 2.1.2

libcurl Version: libcurl/7.16.4 OpenSSL/0.9.7c zlib/1.2.3
J2C Decoder Version: KDU
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.20854 (Mozilla GRE version 1.8.1.13_0000000000)
Packets Lost: 47/39533 (0.1%)

Draw distance 128 m
Bandwidth 500 kbps
Cache 1000 MB
Texture memory 256 MB

[ Permlink | « Hide ]

Boroondas Gupte added a comment - 16/Jan/09 03:14 PM

Measurement as requested on the BSI mailing list: About 7 sec.

Second Life 1.22.6 (108101) Jan 16 2009 12:42:26 (Second Life Public Nightly)
Release Notes

You are at 255141.4, 256551.8, 45.7 in Dore located at sim3002.aditi.lindenlab.com (8.2.33.228:12035)
Second Life Production Server 1.24.9.98659
Release Notes

CPU: Intel(R) Pentium(R) M processor 1.80GHz
Memory: 882 MB
OS Version: Linux 2.6.27-gentoo-r7-ati-fb #1 PREEMPT Tue Jan 13 13:25:36 CET 2009 i686
Graphics Card Vendor: ATI Technologies Inc.
Graphics Card: ATI MOBILITY RADEON 9600/9700 Series
OpenGL Version: 2.1.7979 Release

libcurl Version: libcurl/7.16.4 OpenSSL/0.9.7c zlib/1.2.3 c-ares/1.4.0
J2C Decoder Version: KDU
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.21073 (Mozilla GRE version 1.8.1.13_0000000000)
Packets Lost: 0/2867 (0.0%)

[ Permlink | « Hide ]

Simon Linden added a comment - 16/Jan/09 03:47 PM

Should be in the next RC

[ Permlink | « Hide ]

Bri Gufler added a comment - 17/Jan/09 05:27 AM

Per the BSI email I did this test and measured the download to be 4 seconds.

Second Life 1.22.6 (108101) Jan 16 2009 12:29:16 (Second Life Public Nightly)
Release Notes

You are at 260214.2, 249458.2, 26.8 in Bug Island located at sim4082.agni.lindenlab.com (63.210.156.240:13002)
Second Life Server 1.25.3.107941
Release Notes

CPU: Intel Pentium III/Pentium III Xeon (0.25 micron process) with external L2 cache (2666 MHz)
Memory: 4094 MB
OS Version: Microsoft Windows Vista Service Pack 1 (Build 6001)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 8800 GTX/PCI/SSE2
OpenGL Version: 2.1.2

libcurl Version: libcurl/7.16.4 OpenSSL/0.9.7c zlib/1.2.3
J2C Decoder Version: KDU
LLMozLib Version: [LLMediaImplLLMozLib] - 2.01.21087 (Mozilla GRE version 1.8.1.13_0000000000)
Packets Lost: 0/11257 (0.0%)

[ Permlink | « Hide ]

Ramzi Linden added a comment - 27/Jan/09 07:55 PM

This turned out to be a bug in the viewer.
This should be fixed now, as of the 1.22 RC6 viewer.