d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Lower the bar for ACPI-fast on virtual machines. The current logic depends

Browse Source 
on the fact that real hardware has almost fixed cost to read the ACPI timer.
It is virtually always false for hardware emulation and it makes no sense to
read it multiple times, which is already quite expensive for full emulation.
This commit is contained in:
jkim 2011-04-04 17:00:50 +00:00
parent 8bd7372b19
commit 53ff951196
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/dev/acpica/acpi_timer.c
View File

@ -327,14 +327,15 @@ acpi_timer_test()
}
intr_restore(s);
if (max - min > 2)
delta = max - min;
if (delta > 2 && vm_guest == VM_GUEST_NO)
n = 0;
else if (min < 0 || max == 0)
n = 0;
else
n = 1;
if (bootverbose)
printf(" %d/%d", n, max-min);
printf(" %d/%d", n, delta);
return (n);
}