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Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type
Date: Thu, 25 Jul 2019 16:13:13 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 25/07/19 15:54, Michael S. Tsirkin wrote:
>> FWIW the "PCI tax" seems to be ~10 ms in QEMU, ~10 ms in the firmware(*)
>> and ~25 ms in the kernel.
> How did you measure the qemu time btw?
> 

It's QEMU startup, but not QEMU altogether.  For example the time spent
in memory.c when a BAR is programmed is not part of those 10 ms.

So I just computed q35 qemu startup - microvm qemu startup, it's 65 vs
65 ms.

Paolo



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