Opened 14 years ago
Last modified 8 years ago
#8724 closed defect
100% host CPU when enabling Serial Port with Host Pipe mode — at Initial Version
| Reported by: | Richard Thomas | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 4.0.4 |
| Keywords: | serial port CPU | Cc: | |
| Guest type: | Windows | Host type: | Windows |
Description
VirtualBox uses 100% of one core of my CPU on my dual-core laptop when I launch a guest OS with an enabled Serial Port. Specifically Port Number: COM1 Port Mode: Host Pipe Create Pipe: (Unchecked) Port/File Path: COM1
Changing Port Mode from Host Pipe to Host Device reduces idle CPU usage to less than 5%. The HELP does not explain the difference between what a Host Pipe is and what a Host Device is. Should the Host Pipe mode really use 100% of a core when guest is idle?
OS details: Windows XP Pro Host 32-bit (fully updated), 3Gb RAM, Dual-Core Intel Core2Duo 2.4GHz. Windows XP Pro Guest 32-bit (fully updated)
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