#751 closed defect (invalid)
Strange CPU usage between guests
| Reported by: | Henrik K | Owned by: | |
|---|---|---|---|
| Component: | other | Version: | VirtualBox 1.5.0 |
| Keywords: | Cc: | ||
| Guest type: | other | Host type: | other |
Description
I have VBox 1.5.0 on XP host.
2 guests, XP and Linux, both idling at 0%. Additions installed.
When I stress Linux guest with compiling etc, hosts task manager says CPU usage is:
VirtualBox.exe 50-80% (Linux guest)
VirtualBox.exe 20-50% (XP guest)
When I stress XP guest, the usage looks normal:
VirtualBox.exe 0% (Linux guest)
VirtualBox.exe 99% (XP guest)
Why does the usage of Linux guest affect the XP process? Is this a bug or some architecture stuff I missed? The Linux guest does seem sluggish when compiling stuff etc compared to VMware.
Change History (9)
comment:1 by , 17 years ago
comment:3 by , 17 years ago
Seems to be something funny with process priorities.
If I change a guest to LOWER priority than the other one, then the lower priority one gets 99% like it's supposed to.
comment:4 by , 17 years ago
One way to replicate this with one guest running is to play some video. When the video player is at same or higher priority than guest, then the guest process uses CPU for no apparent reason. When I lower player priority below guest, everything returns to normal.
Maybe it has something to do with graphics, since running high CPU applications like prime95 doesn't get this effect.
comment:6 by , 17 years ago
Looks? Did you read anything? It's nothing like it.
By the way, I can't assist anymore solving this bug if needed. I replaced my single Athlon with Quad Core. I can't see any slowdown effects anymore due to the faster system. ;)
comment:7 by , 17 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
Closing this as obsolete as it is relevant to VirtualBox 1.5.0.
comment:8 by , 17 years ago
Relevant how? I said I upgraded to 1.5.2, also the same problem was with 1.5.4. But who cares. You should give permissions for submitter to change the version tag.
comment:9 by , 17 years ago
Perhaps I was a little too fast there, but since you can no longer reproduce the issue it does not really seam relevant anymore. Yes, you are right about the version tag permissions.
While compiling in Linux guest, the CPU is split 50/50 with idle Windows guest. When I shutdown the Windows guest, then Linux guest gets happily up to 99% and compiling noticeably speeds up. Really irritating!