Date: Sat, 26 Nov 2022 18:06:19 -0500 From: Paul Procacci <pprocacci@gmail.com> To: 0x1eef <0x1eef@protonmail.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: High CPU usage / high number of interrupts Message-ID: <CAFbbPuiQtNa0BeZ7X0UhjFyynhFPKFXcF6NE2CZ7ra7hCgYUnw@mail.gmail.com> In-Reply-To: <NjJeOo65XxAgvh49UV6bzpgNunj1LH1uXy1xnv5QJgjgZfc0xtbKs7PBJb6Ub9LJaPwBKlf94hcsl_Qqt5Yrh_2-BuX5j4MjAdwSGwWEMs4=@protonmail.com> References: <NjJeOo65XxAgvh49UV6bzpgNunj1LH1uXy1xnv5QJgjgZfc0xtbKs7PBJb6Ub9LJaPwBKlf94hcsl_Qqt5Yrh_2-BuX5j4MjAdwSGwWEMs4=@protonmail.com>
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Hey,
Not sure of the problem, but I don't see the correlation between Chrome and
any usb driver.
Out of curiosity, have you pulled a usb device one by one until the
interrupts disappear?
I'd be curious to know which device is slamming the system.
Thanks,
Paul
On Sat, Nov 26, 2022 at 6:02 PM 0x1eef <0x1eef@protonmail.com> wrote:
> Hi, everyone!
>
> When I use Chromium, I see a high rate of CPU usage across all four cores.
> The rate can be anywhere from 20% to 50%, even above that. I am not doing
> anything intensive, just browsing twitter, reddit, YouTube or GitHub. It
> has been like this since I installed FreeBSD, but since it's not a blocker
> I have been lazy about looking into it.
>
> I don't know why it happens. I can see that there are a high number of
> interrupts on 'xhci0', and that seems to carry over to each CPU core as
> well:
>
> # vmstat -i
> interrupt total rate
> irq1: atkbd0 50 0
> irq9: acpi0 403 0
> cpu0:timer 30716618 98
> cpu1:timer 25457926 81
> cpu2:timer 34344531 109
> cpu3:timer 25542867 81
> irq128: xhci0 328107434 1044
> irq130: nvme0:admin 15 0
> irq131: nvme0:io0 701041 2
> irq132: nvme0:io1 692045 2
> irq133: nvme0:io2 792760 3
> irq134: nvme0:io3 693091 2
> irq135: hdac0 1718425 5
> irq136: vgapci0 6273295 20
> Total 455040501 1448
>
>
> # dmesg | grep xhci0
> xhci0: <Intel Ice Lake-LP USB 3.1 controller> mem 0x95110000-0x9511ffff at
> device 20.0 on pci0
> xhci0: 32 bytes context size, 64-bit DMA
> usbus0 on xhci0
>
> It might also be helpful to know that I tried OpenBSD on the same computer
> but it was unusable for a similar reason: 95%+ interrupts on CPU. The
> impact that had made all tasks extremely slow. On FreeBSD it is not as bad,
> but I still think think it is not normal.
>
> Can anyone suggest what might be wrong, tips to debug, etc ? If more
> information is needed, please let me know. Thanks for your time.
>
> Best,
> 0x1eef
>
>
>
--
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<div dir=3D"ltr"><div>Hey,</div><div><br></div><div>Not sure of the problem=
, but I don't see the correlation between Chrome and any usb driver.<br=
></div><div>Out of curiosity, have you pulled a usb device one by one until=
the interrupts disappear?<br><br></div><div>I'd be curious to know whi=
ch device is slamming the system.</div><div><br></div><div>Thanks,</div><di=
v>Paul<br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Sat, Nov 26, 2022 at 6:02 PM 0x1eef <<a href=3D"mailt=
o:0x1eef@protonmail.com">0x1eef@protonmail.com</a>> wrote:<br></div><blo=
ckquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left=
:1px solid rgb(204,204,204);padding-left:1ex"><div style=3D"font-family:Ari=
al;font-size:14px"><span style=3D"line-height:1.5">Hi, everyone!</span><div=
style=3D"line-height:1.5"><br></div><div style=3D"line-height:1.5">When I =
use Chromium, I see a high rate of CPU usage across all four cores. The rat=
e can be anywhere from 20% to 50%, even above that. I am not doing anything=
intensive, just browsing twitter, reddit, YouTube or GitHub. It has been l=
ike this since I installed FreeBSD, but since it's not a blocker I have=
been lazy about looking into it.</div><div style=3D"line-height:1.5"><br><=
/div><div style=3D"line-height:1.5">I don't know why it happens. I can =
see that there are a high number of interrupts on 'xhci0', and that=
seems to carry over to each CPU core as well:</div><div style=3D"line-heig=
ht:1.5"><br></div><div style=3D"line-height:1.5"><span># vmstat -i =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0</span><div><span>interrupt =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0total =C2=A0 =C2=A0 =C2=A0 rate</span></div><div><span>irq1: atkbd0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A050 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00</span></div><div><span>=
irq9: acpi0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0403 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00</span></=
div><div><span>cpu0:timer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A030716618 =C2=A0 =C2=A0 =C2=A0 =C2=A0 98</span></=
div><div><span>cpu1:timer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A025457926 =C2=A0 =C2=A0 =C2=A0 =C2=A0 81</span></=
div><div><span>cpu2:timer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A034344531 =C2=A0 =C2=A0 =C2=A0 =C2=A0109</span></=
div><div><span>cpu3:timer =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A025542867 =C2=A0 =C2=A0 =C2=A0 =C2=A0 81</span></=
div><div><span>irq128: xhci0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0328107434 =C2=A0 =C2=A0 =C2=A0 1044</span></div><div><span=
>irq130: nvme0:admin =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 15 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A00</span></div><div><span>ir=
q131: nvme0:io0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 701=
041 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A02</span></div><div><span>irq132: nvme=
0:io1 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 692045 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A02</span></div><div><span>irq133: nvme0:io2 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 792760 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A03</span></div><div><span>irq134: nvme0:io3 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 693091 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A02</span></div><div><span>irq135: hdac0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A01718425 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A05</span></div><div><span>irq136: vgapci0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A06273295 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 20</span></div><div><span>Total =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0455040501 =C2=A0 =C2=
=A0 =C2=A0 1448</span></div><span></span><br></div><div style=3D"line-heigh=
t:1.5"><br></div><div style=3D"line-height:1.5"><span># dmesg | grep xhci0<=
/span><div><span>xhci0: <Intel Ice Lake-LP USB 3.1 controller> mem 0x=
95110000-0x9511ffff at device 20.0 on pci0</span></div><div><span>xhci0: 32=
bytes context size, 64-bit DMA</span></div><span>usbus0 on xhci0</span><br=
></div><div style=3D"line-height:1.5"><br></div><div style=3D"line-height:1=
.5">It might also be helpful to know that I tried OpenBSD on the same compu=
ter but it was unusable for a similar reason: 95%+ interrupts on CPU. The i=
mpact that had made all tasks extremely slow. On FreeBSD it is not as bad, =
but I still think=C2=A0 think it is not normal.</div><div style=3D"line-hei=
ght:1.5"><br></div><div style=3D"line-height:1.5">Can anyone suggest what m=
ight be wrong, tips to debug, etc ? If more information is needed, please l=
et me know. Thanks for your time.</div><div style=3D"line-height:1.5"><br><=
/div><div style=3D"line-height:1.5">Best,</div><span style=3D"line-height:1=
.5">0x1eef</span><br></div><div style=3D"font-family:Arial;font-size:14px">=
<br></div>
<div style=3D"font-family:Arial;font-size:14px">
<div></div>
=20
<div><br></div>
</div>
</blockquote></div><br clear=3D"all"><br>-- <br><div dir=3D"ltr" class=3D"g=
mail_signature">__________________<br><br>:(){ :|:& };:</div>
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