Search in
Sort by:

Question Status:

Search help

  • Simple searches use one or more words. Separate the words with spaces (cat dog) to search cat,dog or both. Separate the words with plus signs (cat +dog) to search for items that may contain cat but must contain dog.
  • You can further refine your search on the search results page, where you can search by keywords, author, topic. These can be combined with each other. Examples
    • cat dog --matches anything with cat,dog or both
    • cat +dog --searches for cat +dog where dog is a mandatory term
    • cat -dog -- searches for cat excluding any result containing dog
    • [cats] —will restrict your search to results with topic named "cats"
    • [cats] [dogs] —will restrict your search to results with both topics, "cats", and "dogs"

CPU Stall performance issues

I'm new to UE4 and especially to the Profiler tool, but I was experiencing performance issues and I tried to use it to understand what is going on. Specifying that I'm using only BPs my FPS are constant throughout the game, I experience some visible "lag" once in a while. I though that it was one of my algorithms, that had some nested loops, but I disabled it and it is still doing the lag. On the Profiler, I noticed that there are a lot of "CPU Stall - Wait for event" that take more than 2000 ms.

I've generated a file before pressing the button to actually start the game, and these events are called even if there's not much going on as the player is not even moving at this stage.

![alt text

Can anyone suggest me anything? I'm completely stuck on this issue as I don't get where it could come from.

Product Version: UE 4.19
more ▼

asked Oct 11 '18 at 08:26 AM in Using UE4

avatar image

13 1 5

(comments are locked)
10|2000 characters needed characters left
Viewable by all users

1 answer: sort voted first

CPU stalls usually mean the CPU is waiting for something, for example when it waits for the Hard Drive or GPU to finish processing. If its a long CPU stall it may be something is bottle necking you system and the CPU has to wait a while for the process to finish on another piece of hardware.

more ▼

answered May 18 '19 at 11:52 AM

avatar image

0 2 3 7

(comments are locked)
10|2000 characters needed characters left
Viewable by all users
Your answer
toggle preview:

Up to 5 attachments (including images) can be used with a maximum of 5.2 MB each and 5.2 MB total.

Follow this question

Once you sign in you will be able to subscribe for any updates here

Answers to this question