Re: [Bloat] Initial tests with BBR in kernel 4.9

[Hans-Kristian Bakke <hkbakke@gmail.com>]

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 dmesg | grep HPET
[    0.000000] ACPI: HPET 0x00000000BFFE274F 000038 (v01 BOCHS  BXPCHPET
00000001 BXPC 00000001)
[    0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000

I seem to indeed have a HPET in my VM. Does that mean that I should be able
to use fq as intended or could the HPET be some kind of virtualized device?

Regards,
Hans-Kristian

On 25 January 2017 at 22:09, Jonathan Morton <chromatix99@gmail.com> wrote:

>
> > On 25 Jan, 2017, at 23:05, Hans-Kristian Bakke <hkbakke@gmail.com>
> wrote:
> >
> > Do I understand correctly that fq is really just hit and miss within a
> VM in general then? Is there no advantage to the fair queing part even with
> a low-precision clock?
>
> First, check using dmesg or whatever that you do, or do not, have a
> working HPET within your VM.
>
> If this is a widespread problem, I could concoct a patch to sch_fq which
> compensates for it.  I already fixed the same problem when using part of
> sch_fq as a basis for part of sch_cake, and demonstrated correct operation
> on an old, slow PC without an HPET.
>
>  - Jonathan Morton
>
>

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