action #17092
100% cpu usage in virtio_screen.pm function read_until
Start date:
2017-02-15
Due date:
% Done:
0%
Estimated time:
Difficulty:
Description
On my machine isotovideo runs with 100% cpu usage in virtio_screen.pm function read_until.
strace shows that it cycles on this:
read(21, 0x6670db0, 2048) = -1 EAGAIN (Resource temporarily unavailable)
Adding usleep(1000) before the retry on EAGAIN (virtio_screen.pm line 197) helped, but maybe there is a better fix.
History
#1
Updated by rpalethorpe over 5 years ago
Updated by - Priority changed from Normal to High
I guess we can set the socket to blocking and set a timer to signal a timeout or similar, I will do some research, it could be improved anyway.
#2
Updated by rpalethorpe over 5 years ago
- Status changed from New to Feedback
I have made a patch which blocks using select. https://github.com/os-autoinst/os-autoinst/pull/724
#3
Updated by okurz over 5 years ago
Updated by - Category set to Concrete Bugs
- Target version set to Milestone 6
#4
Updated by okurz about 5 years ago
- Status changed from Feedback to Resolved
merged, nadvornik proved it's working for him.