On 05/27/2014 12:56 AM, Chris Murphy wrote:
On May 23, 2014, at 12:46 PM, Adam Williamson <awilliam@xxxxxxxxxx> wrote:
I don't really find them 'astronomically' slow any more, now that
slub_debug is left off most of the time. Slightly slower than regular
kernels, sure, but perfectly fine for testing. Is it different on your
setup?
kernel-core-3.15.0-0.rc6.git0.1.fc21.x86_64
# systemd-analyze
Startup finished in 905ms (kernel) + 1.445s (initrd) + 7.829s (userspace) = 10.180s
kernel-core-3.15.0-0.rc6.git1.1.fc21.x86_64
# systemd-analyze
Startup finished in 4.726s (kernel) + 14.750s (initrd) + 28.758s (userspace) = 48.235s
kernel-core-3.15.0-0.rc6.git1.1.fc21.x86_64 with slub_debug=-
# systemd-analyze
Startup finished in 4.666s (kernel) + 14.890s (initrd) + 28.142s (userspace) = 47.700s
And when the debug kernel is used for installing, the installs are likewise 4-5x longer. For me, it's not usable. The VM is vastly slower, and its host gets hotter and runs fans in noisy mode.
OK, would this "slow kernel" show itself as "long" pauses between
packages when installing. Also, an install for a simple LXDE desktop
seems to be taking about 20 minutes. Is this a long or a good/short
time? All of this is withj a qemu-kvm virtual system with 2 VCPU, 2GB
memory and 8GB virtual disk. The input is a DVD iso on host disk.
Gene
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