AW: AW: AW: KVM performance

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Hello,

now I was able to start the guest vmu with disk virtio, and some of the
tests with disk involvement even improved a bit.
But the test in which a logo is added to the video stream does not
improve. I don't know why the performance is so bad? 

Subtest: Reading video locally, adding a logo to the video stream and
then saving the video locally
		Host performance: 		50%
            kvm process in host (top) : 	99%
		vlc process in vmu (top) : 	99%


The output of kvm_stat -1 during the subtest is the following:

efer_reload                    0         0
exits                    9913473      3994
fpu_reload                393453         4
halt_exits                768222         0
halt_wakeup               497108         0
host_state_reload        3266556         4
hypercalls                508554         0
insn_emulation           5405007      1999
insn_emulation_fail            0         0
invlpg                         0         0
io_exits                 1879454         0
irq_exits                 568541      1995
irq_window                     0         0
largepages                     0         0
mmio_exits                145028         0
mmu_cache_miss             51455         0
mmu_flooded                40895         0
mmu_pde_zapped             34101         0
mmu_pte_updated           448719         0
mmu_pte_write             858494         0
mmu_recycled                   0         0
mmu_shadow_zapped          50590         0
nmi_window                     0         0
pf_fixed                  494176         0
pf_guest                  378754         0
remote_tlb_flush               0         0
request_irq                    0         0
signal_exits                   1         0
tlb_flush                1076949         1

The guest I've started 
has 512 MB RAM, 1 Core 2.2 GHz of the host which is a dual core machine.

Guest settings:       RAM: 512 MB 
                      CPU: 1 Core with 2,2 GHz
Tested i386 OS as well as x86_64 with same performance results.

			    OS: Fedora 10 i386;
2.6.27.21-170.2.56.fc10.i686
                          CONFIG_HIGHMEM=y
                          CONFIG_HIGHMEM4G=y

			    OS: Fedora 10 x86_64;
2.6.27.21-170.2.56.fc10.x86_64
                          The config file does not contain the HIGHMEM
parameter.

Host settings: 	OS: Fedora 10 x86_64; 2.6.27.5-117.fc10.x86_64
			KVM: Version 74 Release 10.fc10


Best regards,
Steffi





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