Re: [RFC] reduce number of kernel flavours

[Petr Salinger <Petr.Salinger@seznam.cz>]

> We currently have a high number of flavors, maybe we can reduce the
> number of flavours and provide a ZFS one with all the GPL code disabled.
>
> For example, I am not sure there is a big speed difference between the
> em64t and the amd64 version of the FreeBSD kernel. We can probably ship
> only one version (as it is already done for the Linux kernel). Also modern
> computers are mostly having dual- (or more) core CPU, we can maybe only
> provide an SMP version for 686 and amd64 kernels, I don't think it will
> visibly impact the speed on non-SMP machines.

The current popcount results are bellow.

IMHO, for kfreebsd-amd64 should suffice to produce only one generic with 
smp enabled. The kfreebsd-i386 should have i486, i686 and i686-smp.

While modern CPUs have either dual core or hyper-threading,
there are many variant of i686 (pentiumpro, pentiumII, pentiumIII, early 
pentiumIV, k6, k7, ...) without smp available. In fact, there is no smp 
variant on kfreebsd-i386 reported so far.

Petr


kfreebsd-image-6-686               5     0     0     0     5 (Not in sid)
kfreebsd-image-6-amd64-generic     2     0     0     0     2 (Not in sid)
kfreebsd-image-6-amd64-k8          1     0     0     0     1 (Not in sid)
kfreebsd-image-6-em64t-p4          1     0     0     0     1 (Not in sid)
kfreebsd-image-6.1-1-686           1     0     1     0     0 (Not in sid)
kfreebsd-image-6.2-1-486           1     0     1     0     0 (Not in sid)
kfreebsd-image-6.2-1-686           1     0     1     0     0 (Not in sid)
kfreebsd-image-6.2-1-amd64-generic     1     0     1     0     0 (Not in sid)
kfreebsd-image-6.3-1-686           5     0     5     0     0 (Not in sid)
kfreebsd-image-6.3-1-amd64-generic     2     1     1     0     0 (Not in sid)
kfreebsd-image-6.3-1-amd64-k8      1     0     1     0     0 (Not in sid)
kfreebsd-image-6.3-1-em64t-p4      1     0     1     0     0 (Not in sid)
kfreebsd-image-7-686               2     0     0     0     2 (Not in sid)
kfreebsd-image-7-em64t-p4-smp      1     0     0     0     1 (Not in sid)
kfreebsd-image-7.0-1-686           3     0     2     1     0 (Not in sid)
kfreebsd-image-7.0-1-em64t-p4-smp     1     0     0     1     0 (Not in sid)
kfreebsd-image-7.1-1-em64t-p4-smp     1     1     0     0     0 (Not in sid)