[EN] config-3.13-0.towo-siduction-amd64 - findings

[ralul]

Disclaimer:
I am not shure all of the following, because the in effect /proc/config.gz
feature is missing since a while:
# grep IKCONFIG conf*
config-3.12-8.towo-siduction-amd64:# CONFIG_IKCONFIG is not set
config-3.13-0.towo-siduction-amd64:# CONFIG_IKCONFIG is not set
I like:
config-3.12.8-1001:CONFIG_IKCONFIG=y
config-3.12.8-1001:CONFIG_IKCONFIG_PROC=y

I wondered about the performance - best ever, then I found
# grep -A 2 -e'_MCORE2' conf*siduct*
config-3.12-8.towo-siduction-amd64:# CONFIG_MCORE2 is not set
config-3.12-8.towo-siduction-amd64-# CONFIG_MATOM is not set
config-3.12-8.towo-siduction-amd64-CONFIG_GENERIC_CPU=y
--
config-3.13-0.towo-siduction-amd64:CONFIG_MCORE2=y
config-3.13-0.towo-siduction-amd64-# CONFIG_MATOM is not set
config-3.13-0.towo-siduction-amd64-# CONFIG_GENERIC_CPU is not set

Best for my machine ...  but for an Amd cpu?
(in the forum some have performance issues)

But I am not sure, because Amd is enabled with NUMA later on, see
# grep NUMA conf* | grep AMD
config-3.12-8.towo-siduction-amd64:CONFIG_AMD_NUMA=y
config-3.13-0.towo-siduction-amd64:CONFIG_AMD_NUMA=y

In kernel help there is mentioned it should be power of 2, but I found
# grep NODES_SHIFT conf*siduct*
config-3.12-8.towo-siduction-amd64:CONFIG_NODES_SHIFT=9
config-3.13-0.towo-siduction-amd64:CONFIG_NODES_SHIFT=6
If it is a shift, should it be a seven shift from one to get eight?

Another interesting diff:
# grep -A 3 -e'_HZ_250' conf*siduct*
config-3.12-8.towo-siduction-amd64:# CONFIG_HZ_250 is not set
config-3.12-8.towo-siduction-amd64-# CONFIG_HZ_300 is not set
config-3.12-8.towo-siduction-amd64-CONFIG_HZ_1000=y
config-3.12-8.towo-siduction-amd64-CONFIG_HZ=1000
--
config-3.13-0.towo-siduction-amd64:CONFIG_HZ_250=y
config-3.13-0.towo-siduction-amd64-# CONFIG_HZ_300 is not set
config-3.13-0.towo-siduction-amd64-# CONFIG_HZ_1000 is not set
config-3.13-0.towo-siduction-amd64-CONFIG_HZ=250

Is this possible, because of the newly introduced total no hertz/tick feature?

[der_bud]

Power of 2  =  2 ^ x  =>  2^6 = 64, 2^9 = 512 ?

[ralul]

Power of 2  =  2 ^ x  =>  2^6 = 64, 2^9 = 512 ?

Yeah, this is the logic. Somewhere are options with a help text supposing "the result must be a power of two" - I had in mind ....

[ralul]

I just see all config issues with the newest towo kernel solved:

config-3.13-0.towo.3-siduction-amd64:CONFIG_IKCONFIG=y
config-3.13-0.towo.3-siduction-amd64:CONFIG_IKCONFIG_PROC=y

config-3.13-0.towo.3-siduction-amd64:# CONFIG_MCORE2 is not set
config-3.13-0.towo.3-siduction-amd64-# CONFIG_MATOM is not set
config-3.13-0.towo.3-siduction-amd64-CONFIG_GENERIC_CPU=y

config-3.13-0.towo.3-siduction-amd64:# CONFIG_HZ_250 is not set
config-3.13-0.towo.3-siduction-amd64-# CONFIG_HZ_300 is not set
config-3.13-0.towo.3-siduction-amd64-CONFIG_HZ_1000=y
config-3.13-0.towo.3-siduction-amd64-CONFIG_HZ=1000

There happened many more adaptations and optimizations with
linux-image-3.13-0.towo.3-siduction-amd64

[melmarker]

Me running a amd phenom 965 - and did not encounter any performance issues with any of towos kernels - maybe because i'm not use my computer so often

[ralul]

Naturally the first of Towos kernels was a performance boost and fitted my cpu better than the following ones.  But I felt some obligation to mention the altered configuration in the forum. Obviously the first kernel of a new major release was just a first shot made with defaults by Towo. Probably to see if it runs at all ...

[melmarker]

quatsch