[BUG-216233] Strange framerate "hitching" appears to be coinciding with frequent texture changes

[sl-service-account]

Steps to Reproduce

I was afk and when i came back i noticed that the client had become really sluggish, panning the camera felt like i had a low framerate, even tho nothing had changed (no other avatars, no new objects).

Actual Behavior

Performances appears to degrade severely after several hours near an object that switches textures very frequenty.

Expected Behavior

There shouldn't be any long term impact on viewer performances.

Other information

I linked my client's Render graph, you can notice a repeated "spiking" which i attributed to a vending machine that was animating its texture by rotating between 4 different textures, one every 0.5 second.

This appeared to coincide with the frequency of the secondlife client frame hitching.

I joined two pictures showing how after several hours the frame when the texture is being switched becomes longer and longer. It doesn't appear to really affect the framerate overall but you can definitely feel that the client is not responsive.

Attachments

• after_a_few_hours.png 2018-05-07 10:58:22
• on_logon.png 2018-05-07 10:58:22

Original Jira Fields

| Field | Value | | ------------- | ------------- | | Issue | BUG-216233 | | Summary | Strange framerate "hitching" appears to be coinciding with frequent texture changes | | Type | Bug | | Priority | Unset | | Status | Needs More Info | | Resolution | Unresolved | | Reporter | Kyrah Abattoir (kyrah.abattoir) | | Created at | 2018-05-07T14:58:22Z | | Updated at | 2018-05-07T17:41:36Z | ``` { 'Business Unit': ['Platform'], 'Date of First Response': '2018-05-07T11:04:01.954-0500', "Is there anything you'd like to add?": 'I linked my client\'s Render graph, you can notice a repeated "spiking" which i attributed to a vending machine that was animating its texture by rotating between 4 different textures, one every 0.5 second.\r\n\r\nThis appeared to coincide with the frequency of the secondlife client frame hitching.\r\n\r\nI joined two pictures showing how after several hours the frame when the texture is being switched becomes longer and longer. It doesn\'t appear to really affect the framerate overall but you can definitely feel that the client is not responsive.', 'ReOpened Count': 0.0, 'Severity': 'Unset', 'System': 'SL Viewer', 'Target Viewer Version': 'viewer-development', 'What just happened?': 'Performances appears to degrade severely after several hours near an object that switches textures very frequenty.', 'What were you doing when it happened?': 'I was afk and when i came back i noticed that the client had become really sluggish, panning the camera felt like i had a low framerate, even tho nothing had changed (no other avatars, no new objects).', 'What were you expecting to happen instead?': "There shouldn't be any long term impact on viewer performances.", 'Where': 'http://maps.secondlife.com/secondlife/dead%20realm/89/21/40 (I removed the offending objects at the moment)', } ```

[sl-service-account]

Kyle Linden commented at 2018-05-07T16:04:02Z

Hi Kyrah,

Will you please send a copy of the item to Whirly and I for further investigation. (Whirly Fizzle and Kyle Linden) If you do not have the permissions to do so, please rez it somewhere that will not impact other residents and copy the SLurl here and I will make a copy using Admin rights.

Please press the Info Provided button when you update this report.

Thanks!

[sl-service-account]

Kyrah Abattoir commented at 2018-05-07T17:41:36Z

I'm gonna have to do more tests on this because the texture change might only be a "magnifying factor".