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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[-- Attachment #1 --]
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
>
>
>
--
__________________
:(){ :|:& };:
[-- Attachment #2 --]
<div dir="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 which device is slamming the system.</div><div><br></div><div>Thanks,</div><div>Paul<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Nov 26, 2022 at 6:02 PM 0x1eef <<a href="mailto:0x1eef@protonmail.com">0x1eef@protonmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-family:Arial;font-size:14px"><span style="line-height:1.5">Hi, everyone!</span><div style="line-height:1.5"><br></div><div style="line-height:1.5">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.</div><div style="line-height:1.5"><br></div><div style="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="line-height:1.5"><br></div><div style="line-height:1.5"><span># vmstat -i </span><div><span>interrupt total rate</span></div><div><span>irq1: atkbd0 50 0</span></div><div><span>irq9: acpi0 403 0</span></div><div><span>cpu0:timer 30716618 98</span></div><div><span>cpu1:timer 25457926 81</span></div><div><span>cpu2:timer 34344531 109</span></div><div><span>cpu3:timer 25542867 81</span></div><div><span>irq128: xhci0 328107434 1044</span></div><div><span>irq130: nvme0:admin 15 0</span></div><div><span>irq131: nvme0:io0 701041 2</span></div><div><span>irq132: nvme0:io1 692045 2</span></div><div><span>irq133: nvme0:io2 792760 3</span></div><div><span>irq134: nvme0:io3 693091 2</span></div><div><span>irq135: hdac0 1718425 5</span></div><div><span>irq136: vgapci0 6273295 20</span></div><div><span>Total 455040501 1448</span></div><span></span><br></div><div style="line-height:1.5"><br></div><div style="line-height:1.5"><span># dmesg | grep xhci0</span><div><span>xhci0: <Intel Ice Lake-LP USB 3.1 controller> mem 0x95110000-0x9511ffff 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="line-height:1.5"><br></div><div style="line-height:1.5">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.</div><div style="line-height:1.5"><br></div><div style="line-height:1.5">Can anyone suggest what might be wrong, tips to debug, etc ? If more information is needed, please let me know. Thanks for your time.</div><div style="line-height:1.5"><br></div><div style="line-height:1.5">Best,</div><span style="line-height:1.5">0x1eef</span><br></div><div style="font-family:Arial;font-size:14px"><br></div>
<div style="font-family:Arial;font-size:14px">
<div></div>
<div><br></div>
</div>
</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature">__________________<br><br>:(){ :|:& };:</div>
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