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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [PATCH] qemu:cpuid: speedup test by 3x times if grub2 is available |
| Date: | Thu, 14 Feb 2013 13:13:18 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 |
Il 14/02/2013 12:18, Eduardo Habkost ha scritto: >> > qemu boots from disk image 3 times faster than direct kernel load. > That's surprising. Do you have any idea why that happens? Because kernel load uses MMIO (from fw_cfg), while booting from disk uses at worst PCI DMA and at best virtio. Paolo
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