Custom Query (16363 matches)
Results (1444 - 1446 of 16363)
| Ticket | Resolution | Summary | Owner | Reporter |
|---|---|---|---|---|
| #8278 | obsolete | Guest slowing down host | ||
| Description |
Hi guys/gals, As the title describes I'm experiencing that the guest is slowing down the host system. What you usually see in the bug-tracker is that the host is slowing down the guest, for me that is NOT the case. I've noticed this thanks to my G19 keyboard which displays the clock. The second hand on the clock was progressing too slow and that caught my attention. This problem has been going on for months now (hoping it would be solved) and today I narrowed it down to a specific VirtualBox build using benchmarks/tests/<name it whatever you want>. I am going to describe what I did, what helped and what didn't help. FYI: The tests I've run are all related to AMD-V as my machine is a Phenom II X4 940 with 4GB of RAM running Windows 7 (x64) on a SATA II HDD with 16MB of cache. Please do not tell me the problem can be solved by switching Cool 'n' Quiet on or off, this doesn't solve the problem at all as it's not hardware or BIOS related in any way. It's not related to a specific Windows 7 installation either because I've also tested it with a clean install of Windows 7 (32 bit) without any software installed whatsoever. I'm using the official binaries which can be found on the Downloads page. I'm NOT using the Open Source Edition nor am I using the Extension Pack. No offense but please don't be a smart* and tell me it related to anything I've just said it isn't. I've mentioned it and will mention it again: the problem I have is from a specific build. The way I tested was using the Windows "Date and Time" window together with a mobile phone which shows the clock on it's display. With the non-laggy build (3.2.10) both clocks run perfectly synchronous. The newer versions (3.2.12 and upwards) show a lag unless the guest creates heavy disk/CPU usage for the host (e.g.: booting the OS or installing Guest Additions). I've tested with AMD-V and I/O APIC on and off for single-core and quad-core use (were applicable) on a 32-bit guest (Windows, Fedora 14 and Ubuntu 9.04) without Guest Additions. A 64-bit guest does not seem to improve the situation. These are the results I've gathered: Boot times (x86 and x64 together):
As you can see it doesn't matter which build you install and it still looks good, but then lets see what it does to the host clock.. Seconds processed:
Now these results are stunning, right? What it translate to is that every 5 minutes you lose 2, which pretty much means that every hour the clock is 24 minutes behind! For what it's worth I think it relates to the "VMM: use new VT-x feature to keep the guest from hogging the CPU" feature that has been added in v3.2.12 build 68302 which might not work for AMD. HTH, |
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| #8286 | obsolete | Host USB mouse lost | ||
| Description |
XP x64 host, various guests.
Quite often but not always, when I start the VBox Manager or when (with VBox Manager running) I plug or unplug an USB device, my mouse pointer freezes. To have my mouse back working I must unplug it and plug it again. No messages whatsoever are shown. |
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| #8287 | obsolete | BSOD when starting VirtualBox on Windows 7 64-bit | ||
| Description |
Sometimes when I start VirtualBox I get a BSOD before the VirtualBox window shows up. I'll attach some minidump files. |
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