Date: Tue, 16 Aug 2011 12:04:02 -0400 From: Joe Schaefer <joesuf4@gmail.com> To: Alexander Motin <mav@freebsd.org> Cc: hackers@freebsd.org Subject: Re: Clock stalls on Sabertooth 990FX Message-ID: <CAOzHqcLGXCFuWFzmo6v-rGo5_odrjWOP4D1ZkL2P8-jJeGn81A@mail.gmail.com> In-Reply-To: <4E4A81DD.3030202@FreeBSD.org> References: <CAOzHqcJMWrO1Q-v8WpzxnyB0-TMQvVaBC9WQ6Qf_CkK_FtT3VA@mail.gmail.com> <mailpost.1313435952.4224912.75598.mailing.freebsd.hackers@FreeBSD.cs.nctu.edu.tw> <4E498326.2060308@FreeBSD.org> <CAOzHqcK3HMY=-7iNX05W43B=W5NP_bDWcJdDZ%2BEXk_Z%2BAdfAOw@mail.gmail.com> <4E4988F0.7060000@FreeBSD.org> <CAOzHqcK1_vkG6s7%2BgLGKx_kw7o1BVmyYKdxgK07FvadPMQkVUw@mail.gmail.com> <4E498E3D.7050100@FreeBSD.org> <CAOzHqcKJRSDZ6uUtdFN8Wovi5L70YM=EBzdyy2p63qYbJqH%2BwA@mail.gmail.com> <CAOzHqcK1PbqV5S5tFG6uAwn5wGj0EXW67YSfw%2B8NRpkUC5dWqw@mail.gmail.com> <CAOzHqcJLwVnGunws5HfAVnHqm2wtroRhfwzxOeJibiVL9ypCMA@mail.gmail.com> <CAMwoQQ7_MgOBfKZJA=D9ezT48Ft305o6C85CAwLeicM6mV4Mjg@mail.gmail.com> <CAOzHqcLaeN%2BPoE8s=eXyWVcXvV5YZ0AhiZOptS%2BLys=byLWcMA@mail.gmail.com> <4E4A81DD.3030202@FreeBSD.org>
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On Tue, Aug 16, 2011 at 10:42 AM, Alexander Motin <mav@freebsd.org> wrote:
> Joe Schaefer wrote:
>>>>>>> If changing timecounter won't help, try please this patch:
>>>>>>>
>>>>>>> --- acpi_hpet.c.prev =C2=A0 =C2=A02010-12-25 11:28:45.000000000 +02=
00
>>>>>>> +++ acpi_hpet.c 2011-05-11 14:30:59.000000000 +0300
>>>>>>> @@ -190,7 +190,7 @@ restart:
>>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bus_write_4(=
sc->mem_res, HPET_TIMER_COMPARATOR(t->num),
>>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0t->next);
>>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0}
>>>>>>> - =C2=A0 =C2=A0 =C2=A0 if (fdiv < 5000) {
>>>>>>> + =C2=A0 =C2=A0 =C2=A0 if (1 || fdiv < 5000) {
>>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bus_read_4(s=
c->mem_res, HPET_TIMER_COMPARATOR(t->num));
>>>>>>> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0now =3D bus_=
read_4(sc->mem_res, HPET_MAIN_COUNTER);
>>>>>>>
>>>>>>> --
>>>>>>> Alexander Motin
>>>>>> Will do next.
>>>>>>
>>>>> Patch applied. Running with HPET eventtimer and no stalls during
>>>>> make buildworld -j12.
>>>>>
>>> it maybe help, I used to come across a bug on Linux with regard to HPET=
,
>>> some northbridge chipset (maybe amd's, where
>>> HPET sit on) has a problem, that writes to =C2=A0compatitor regs will n=
ot take
>>> effect immediately, you need a read to reg to flush it;
>>
>> So far the patch performs flawlessly for me. =C2=A0I'm tempted to reenab=
le turbo
>> mode just for kicks (someday, not today- delighted with the uptime!)
>
> I am going to commit following patch:
> http://people.freebsd.org/~mav/hpet.paranoid.patch
> . It uses same assumptions as Linux. Try it please.
+1 to apply: (tested with buildworld -j18)
--------------------------------------------------------------
>>> World build completed on Tue Aug 16 12:02:20 EDT 2011
--------------------------------------------------------------
5255.533u 2443.815s 30:28.62 421.0% 6535+4429k 0+0io 223826pf+0w
sextant# uname -a
FreeBSD sextant.sunstarsys.com 9.0-BETA1 FreeBSD 9.0-BETA1 #1
r224899M: Tue Aug 16 10:55:12 EDT 2011
joe@sextant.sunstarsys.com:/usr/obj/usr/src/sys/DTRACE amd64
sextant# uptime
12:02PM up 32 mins, 3 users, load averages: 6.90, 12.58, 10.64
>
> --
> Alexander Motin
>
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