Opera burns CPU with poll()+recvmsg() loop
-
pfactum last edited by
Same applies to Chromium 58.0.3029.110. The only difference is that EAGAIN arrives more rarely (once per several, up to 10, seconds), thus CPU is not used that high as by Opera.
So, it has something to do with engine.
-
-
-
A Former User last edited by
Having nothing to add to your problem, I would like to mention that chromium was updated to 59.x today from upstream. Check if that solves your problem.
-
pfactum last edited by
Again, same applies to Chromium 59.0.3071.86, but to less extent. strace shows the same picture, but recvmsg fails with EAGAIN once per several seconds, thus CPU load is minimal. For Opera, recvmsg returns EAGAIN lots of times per second, and CPU load is noticeable.
So, this has something to do with common engine code, likely, interaction with X server.
-
-
avl Opera last edited by
Hi @pfactum, what you're seeing in strace is the message loop. Every UI application has one, and among other things, it handles communication with the X11 server. It is indeed very busy - a browser sends and receives lots of messages, many in one second. Getting EAGAIN is a normal part of life, and might indicate that Opera is busy (meaning that messages that are no longer relevant don't need to be handled). The EAGAIN is more likely to be a symptom than an effect of the high CPU usage you see.
If you still see high CPU usage while using Opera, check out the built-in Task Manager to see exactly which process is using CPU, perhaps then we can find out what's happening on your system.
-
-
-
