Hi, I am trying to measure filesystem performance on guest OS (using qemu with kvm) compared to host using bonnie++. The root file system on guest is mounted on an AHCI device emulated using sd interface (-drive file=/dev/sdb2,if=sd) While a sequential character output speed on host (samsung exynos-a15 platform) fetched a speed of 5686K/sec, the guest (versatile express-a15) speed was 368K/sec. This translates to around 7% efficiency. Is this an acceptable speed difference with device emulation ? Thanks, Giridhar _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/cucslists/listinfo/kvmarm