Description of problem: Fedora's build of qemu includes gPXE and pxe-virtio.bin ROMs. Together these ROMs add a useless 9 second delay in the boot time. If you remove them manually (ie. rm -r /usr/share/gpxe; rm /usr/share/qemu/pxe-virtio.bin) then that shaves 9 seconds off the BIOS boot time, reducing the BIOS part to under a second. Version-Release number of selected component (if applicable): qemu-system-x86-0.12.3-3.fc13.i686 gpxe-roms-qemu-1.0.0-1.fc13.noarch How reproducible: Always. Steps to Reproduce: time qemu-kvm \ -kernel /boot/vmlinuz-2.6.33-1.fc13.i686.PAE \ -no-reboot -nodefaults -nographic -serial stdio \ -append "panic=1 console=ttyS0" -m 256 \ -net user,vlan=0,net=10.0.2.0/8 -net nic,model=virtio,vlan=0 rm -r /usr/share/gpxe; rm /usr/share/qemu/pxe-virtio.bin Repeat the above qemu-kvm command, and notice greatly reduced boot time. Actual results: Long (9 second) pause while the option ROMs wait for something or other. Expected results: Just boot, dammit!! Additional info:
The delay is caused by the banner that gpxe displays. Setting #define BANNER_TIMEOUT 0 in src/config/general.h should be all that's needed. Booting is pretty fast now [ruben@phy003 ~]$ time qemu-kvm -kernel /boot/vmlinuz-2.6.32.9-67.fc12.x86_64 -nodefaults -nographic -serial stdio -append 'panic=1 console=ttyS0' -m 256 -no-reboot >/dev/null real 0m2.473s user 0m1.489s sys 0m0.346s
(In reply to comment #1) > [ruben@phy003 ~]$ time qemu-kvm -kernel /boot/vmlinuz-2.6.32.9-67.fc12.x86_64 > -nodefaults -nographic -serial stdio -append 'panic=1 console=ttyS0' -m 256 > -no-reboot >/dev/null You need to add the -net ... parameters too, otherwise the troublesome pxe-virtio.bin ROM isn't loaded (another 4-5 seconds delay). I don't think BANNER_TIMEOUT is the whole story.
Ok, here are my timings with the -net parameter added. Strace shows that the option rom is loaded (twice?) [ruben@phy003 ~]$ time strace -etrace=file qemu-kvm -kernel /boot/vmlinuz-2.6.32.9-70.fc12.x86_64 -no-reboot -nodefaults -nographic -serial stdio -append "panic=1 console=ttyS0,115200n8" -m 256 -net user,vlan=0,net=10.0.2.0/8 -net nic,model=virtio,vlan=0 >/dev/null readlink("/proc/self/exe", "/usr/bin/qemu-kvm", 4095) = 17 access("/usr/share/qemu", R_OK) = 0 open("/dev/kvm", O_RDWR) = 3 access("/usr/share/qemu/bios.bin", R_OK) = 0 open("/usr/share/qemu/bios.bin", O_RDONLY) = 8 access("/usr/share/qemu/bios.bin", R_OK) = 0 open("/usr/share/qemu/bios.bin", O_RDONLY) = 8 open("/boot/vmlinuz-2.6.32.9-70.fc12.x86_64", O_RDONLY) = 8 access("/usr/share/qemu/vapic.bin", R_OK) = 0 open("/usr/share/qemu/vapic.bin", O_RDONLY) = 8 access("/usr/share/qemu/linuxboot.bin", R_OK) = 0 open("/usr/share/qemu/linuxboot.bin", O_RDONLY) = 8 open("/etc/localtime", O_RDONLY) = 8 access("/usr/share/qemu/pxe-virtio.bin", R_OK) = 0 open("/usr/share/qemu/pxe-virtio.bin", O_RDONLY) = 8 open("/usr/share/qemu/pxe-virtio.bin", O_RDONLY) = 8 --- SIGALRM (Alarm clock) @ 0 (0) --- real 0m2.548s user 0m1.512s sys 0m0.377s And if I remove the pxe roms: readlink("/proc/self/exe", "/usr/bin/qemu-kvm", 4095) = 17 access("/usr/share/qemu", R_OK) = 0 open("/dev/kvm", O_RDWR) = 3 access("/usr/share/qemu/bios.bin", R_OK) = 0 open("/usr/share/qemu/bios.bin", O_RDONLY) = 8 access("/usr/share/qemu/bios.bin", R_OK) = 0 open("/usr/share/qemu/bios.bin", O_RDONLY) = 8 open("/boot/vmlinuz-2.6.32.9-70.fc12.x86_64", O_RDONLY) = 8 access("/usr/share/qemu/vapic.bin", R_OK) = 0 open("/usr/share/qemu/vapic.bin", O_RDONLY) = 8 access("/usr/share/qemu/linuxboot.bin", R_OK) = 0 open("/usr/share/qemu/linuxboot.bin", O_RDONLY) = 8 open("/etc/localtime", O_RDONLY) = 8 access("/usr/share/qemu/pxe-virtio.bin", R_OK) = -1 ENOENT (No such file or directory) open("pxe-virtio.bin", O_RDONLY) = -1 ENOENT (No such file or directory) pci_add_option_rom: failed to find romfile "pxe-virtio.bin" --- SIGALRM (Alarm clock) @ 0 (0) --- real 0m2.455s user 0m1.453s sys 0m0.377s
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This has fixed itself, so closing.