Date: Sat, 18 Mar 2023 14:59:44 +0100 From: =?UTF-8?Q?Julie_Koubov=C3=A1?= <julie@koubova.net> To: freebsd-virtualization@freebsd.org Subject: Bhyve process consumes way too much CPU Message-ID: <CABQ-j0bbTQWhM1wgYvDvvwpxQexqgtYDgN4vj8pYp2Ttu_WHHg@mail.gmail.com> In-Reply-To: <CABQ-j0ZH-OrZSb866iVMba-ZfxOsovGoyLd=YZ=auOiNtm-TkA@mail.gmail.com>
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[-- Attachment #1 --] Hey everyone, I'm running Linux (Home Assistant OS) in Bhyve on FreeBSD 13.1. I use PCI passthrough to allow the VM to access a USB card with a couple of radio dongles. The host machine is an Intel Core i3 13100 with 64 GB of RAM. The CPU has 4 physical cores (8 hyper-threaded). The virtual machine is assigned four cores. The host load averages are 0.39 0.39 0.40 right now, which seems way too much. The same workload was previously handled by a Raspberry Pi 4, and the CPU usage there was under 10% when not doing anything special. Inside the guest OS, the CPU usage is reported around 5%, which seems reasonable. What's wrong? How can I start debugging this issue? I use ZFS on the host, vm-bhyve to manage the virtual machines, and I don't have a swap partition. Thanks for your help, Julie [-- Attachment #2 --] <div dir="ltr"><div class="gmail_default" style="font-size:large">Hey everyone,<br></div><div class="gmail_quote"><div dir="ltr"><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">I'm running Linux (Home Assistant OS) in Bhyve on FreeBSD 13.1. I use PCI passthrough to allow the VM to access a USB card with a couple of radio dongles. The host machine is an Intel Core i3 13100 with 64 GB of RAM. The CPU has 4 physical cores (8 hyper-threaded). The virtual machine is assigned four cores. </div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">The host load averages are 0.39 0.39 0.40 right now, which seems way too much. The same workload was previously handled by a Raspberry Pi 4, and the CPU usage there was under 10% when not doing anything special. Inside the guest OS, the CPU usage is reported around 5%, which seems reasonable.</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">What's wrong? How can I start debugging this issue? I use ZFS on the host, vm-bhyve to manage the virtual machines, and I don't have a swap partition.</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">Thanks for your help,</div><div class="gmail_default" style="font-size:large">Julie</div></div> </div></div>help
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