Optimized kernel builds: the straight dope

[Hervé Fache]

Hello all,

Took me too long to find the time! But never mind, here are the results:

no_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	335	97.3	0.0	0.0	1.00
2.6.15-26-k7       3	330	98.2	0.0	0.0	1.00
cacherun:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	326	99.1	0.0	0.0	0.97
2.6.15-26-k7       3	326	99.1	0.0	0.0	0.99
process_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	472	68.9	504.0	30.5	1.41
2.6.15-26-k7       3	467	69.2	444.3	29.6	1.42
ctar_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	418	79.2	6.3	4.8	1.25
2.6.15-26-k7       3	394	84.0	6.0	4.8	1.19
xtar_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	622	54.0	14.3	11.6	1.86
2.6.15-26-k7       3	535	62.2	12.3	12.0	1.62
io_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	872	38.2	13126.4	18.8	2.60
2.6.15-26-k7       3	820	40.6	12280.1	19.6	2.48
read_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	1196	28.0	86.9	6.7	3.57
2.6.15-26-k7       3	510	64.9	26.7	4.7	1.55
list_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	429	76.9	1.3	12.6	1.28
2.6.15-26-k7       3	413	79.9	1.0	12.8	1.25
mem_load:
Kernel        [runs]	Time	CPU%	Loads	LCPU%	Ratio
2.6.15-26-386      3	354	91.8	42.7	0.0	1.06
2.6.15-26-k7       3	340	95.3	42.3	0.0	1.03

As you can see, all similar number apart from the read_load test. We
still seem to benefit from the optimized kernel under load though.

HTH
Hervé.

On 8/15/06, Hervé Fache <Herve at lucidia.net> wrote:
> Matt,
>
> I would like to run this test on my AthlonXP 2800+ box, which is a
> very fast machine. This might bring some interesting results from the
> -k7 side?
>
> Hervé.
>
> On 8/14/06, Matt Zimmerman <mdz at ubuntu.com> wrote:
> > Enter Ben Collins, our kernel team lead, who has put together a performance
> > test to answer that question, covering both the i386 and amd64
> > architectures.
>