On 01/14/2019 02:11 PM, Daniel Miller via VBox-users-community wrote: > On 1/13/2019 6:47 PM, David C. Rankin wrote: >> On 01/13/2019 01:35 AM, David C. Rankin wrote: >>>> I don't know whether this is normal or FUBAR -- but it seems to correspond >>>> to >>>> every line of dir output once the screen starts to scroll on cmd.exe. >>>> >>>> Is this normal?? >>> I probably cut the strace output off a few lines early. The only other line >>> in >>> the output is: >>> >>> futex(0x19431b8, FUTEX_WAKE_PRIVATE, 1) = 1 >>> >>> Do we have a threading issue locked thread causing the issue? >> ...<snip to end>... >> >> >> So it looks like something is FUBAR with the select/read for win32 guests (I >> have no win64 guests to test) > > Never saw a specific reply to Bruce's earlier suggestion. Have you tried > changing from Hyper-V to KVM to see if there's a difference? Not saying > anything about *should* - but give it a try. > > Daniel > >
Daniel, Thank you. I have made the change or virtualization to KVM and the problem remains exactly the same. Moreover, this seems to be a problem with the 6.0.0 interface when accessed remotely. Why I don't see the marked slowdown with Linux guests is a mystery. However, simply starting VirtualBox to make the change to KVM (over ssh -X) is horrendously slow. I've often used VirtualBox over ssh to make changes to a guest config. While it hasn't ever been crisp and snappy that way, at least in the past it was usable. Now, it is unbearably slow. With no guests running, simply trying to start VirtualBox over ssh takes 15 seconds just to fill in the guest details after the window appears. Bizarre. If you move your mouse over the guests, there is a 4-5 second delay before you see the TreeList items highlight. To access anything you have to put the cursor over the button or selection and wait 4-5 seconds for focus to catch up and actually make the button ready to be clicked. I suspect this is related to the problem I am having with the Win7 guest. I went ahead and grabbed another strace with the Win7 guest running using KVM virtualization -- exact same information output on stderr: # cat 20190114-152209_win32_err.log strace: Process 32255 attached select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 ...<snip>... select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 futex(0x260b1b8, FUTEX_WAKE_PRIVATE, 1) = 1 read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 select(10, [9], NULL, [9], NULL) = 1 (in [9]) read(9, "\372", 1) = 1 ...<snip to end>... -- David C. Rankin, J.D.,P.E. _______________________________________________ VBox-users-community mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/vbox-users-community _______________________________________________ Unsubscribe: mailto:[email protected]?subject=unsubscribe
