On 03/08/07 09:58, Fluffles wrote:
Eric Anderson wrote:
On 03/07/07 23:13, Fluffles wrote:
On what hardware is this? Using any form of geom software RAID?
The low Per Char results would lead me to believe it's a very slow CPU;
maybe VIA C3 or some old pentium? Modern systems should get 100MB/s+ in
per-char bonnie benchmark, even a Sempron 2600+ 1.6GHz 128KB cache which
costs about $39. Then it might be logical DD gets higher results since
this is more 'easy' to handle by the CPU. The VFS/UFS layer adds
potential for nice performance-increases but it does take it's toll in
the form of cputime overhead. If your CPU is very slow, i can imagine
these optimizations having a detrimental effect instead. Just
guessing here.
Before making speculative claims about slow CPU's and putting the VIA
C3 in with that pile, please at least refer to what makes you believe
that it is an issue. Comparing the VIA C3 to 'some old pentium' isn't
exactly fair or accurate, and inferring it isn't a modern system isn't
true either.
I'm sorry if i offended you. But it is well-known that C3 Nehemiah has a
much lower IPC than processors from AMD and Intel. For general purpose
comparisons, i would guess a 400MHz Athlon 64 to outperform the 1GHz C3
Nehemiah; just guessing here! Not to talk about Core2Duo who has even
higher IPC.
No offense, I just prefer the fud to be kept off lists - it's
essentially trolling I suppose. No doubt the C3 and C7 processors are
slower than the top of the line Intel and AMD's - that's like comparing
a Prius with a Porsche. If you can find a 400MHz Athlon 64, I'd enjoy
seeing the benchmarks. :) However, just simple benchmarks for IPC don't
tell much about a processor.
Though Nehemiah does have some fancy MPEG/AES hardware acceleration
stuff built-in, which makes it a suitable platform for a Media Center or
anything like that. Personally i think a budget AMD processor to be a
better option; they have the same power consumption under standby mode
(thanks to Cool'N'Quiet) but can deliver much higher performance when
needed (such as HighDef 1080p video?).
Well, not actually the same power consumption at all. Again, do a
little googling here, and you might find some actual numbers (not just
reported numbers).
The bonnie Per Char-benchmark is often bottlenecked by the CPU since it
requires either a lot of cpu power or a lot of memory activity; both
which puts demands on the cpu. If i see only 0.5MB in the Per
Char-benchmark, i would suspect a slow CPU. Slow is a relative term
though; C3 can be powerful enough for the task you bought it, so i don't
want to discredit it.
Dunno. I was merely trying to keep things honest, since what was
communicated (whether intended or not) was that a C3 isn't modern, and
is akin to a Pentium, which it isn't.
Eric
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