hi,
are the host stats contain only acttive hosts or all hosts ever connected?

All hosts with credit > 0.

How are the CPU brands defined?

There are a lot of 'other' CPUs in the project stats, And I think they should be one of the three major (Intl, AMD, Power).

90% other for Einstein
86% other for BURP
67% other for Pirates
60% other for Protein
55% other for CPDN
49% other for LHC
43% other for Seti

There is also Sun (Spark), Cyrix, IBM and a bunch of others, but their numbers are to small to list them all, so I only show the big ones.

I know that, that's why I asked.
According to [url=http://www.boincstats.com/stats/project_graph.php?pr=einstein' target='_blank]your site[/url], Einstein is crowded with this esoteric stuff:
Other: 90.2%
Intel: 6.9%
Power Mac: 2.0%
AMD: 0.8%

Any explanation?

Hmm ... Einstein@Home has only clients for Windows, X86-Linux and OS/X. (And 2 Alpha machines are running).

It is really strange that only 10% of the machines have the typical processors and 90% have whatever other? Somehow I cannot believe that.

esotheric :-) LOL!

I did a little bit of private statistics. I used this file [url=http://einstein.phys.uwm.edu/stats/host_id.gz' target='_blank]http://einstein.phys.uwm.edu/stats/host_id.gz[/url]

and this command:
zgrep p_vendor ~/tmp/host_id.gz |sed 's,^.*<p_vendor>,,;s,</p_vendor>.*$,,;s/^([^ ][^ ]* *[^ ][^ ]*) .*$/1/;s/GenuineIntel [0-9]*MHz/GenuineIntel/' | sort | uniq -c | sort -n

which gave me the following result.

1 AMD
1 AMD Duron&#153;
1 AMD Duron&#153;Processor
1 AuthenticAMD 1470MHz
1 i386
1 Intel
1 Transmeta&#153; Crusoe&#153;
1 VIA Nehemiah
2 AMD-K6&#153; 3D
2 AMD K7
2 AMD Opteron&#153;
2 HP (DEC)
3 AMD Athlon
3 AMD Sempron&#153;
3 Unknown CPU
4
4 Intel&reg; XEON&#153;
7 Mobile AMD
9 GenuineTMx86
12 mobile AMD
20 Intel&reg; Xeon&#153;
24 AMD Duron&#153;
30 Intel&reg; Celeron&reg;
31 AMD Athlon&#153;
32 Mobile Intel&reg;
36 CentaurHauls
38 Unknown
64 Intel&reg; Celeron&#153;
249 AMD Athlon&#153;
493 Intel&reg; Pentium&reg;
1123 Power Macintosh
18423 AuthenticAMD
34411 GenuineIntel

Then I tried this one:
zgrep p_model ~/tmp/host_id.gz |sed 's,^.*<p_model>,,;s,</p_model>.*$,,;s/^([^ ][^ ]* *[^ ][^ ]*) .*$/1/' | sort | uniq -c | sort -n

with the reult shown here:
5 AMD Engineering
5 Pentium MMX
5 Pentium Pro
5 PowerBook5,6
5 PowerBook6,8
7 iMac
7 Pentium&reg; Processor
7 PowerBook3,3
7 PowerMac4,5
8 AMD-K6&#153; 3D+
8 GenuineIntel
8 PowerBook3,2
8 PowerBook4,1
8 PowerBook6,2
8 Transmeta&#153; Crusoe&#153;
8 VIA Samuel
9 PowerBook3,4
9 PowerBook5,5
10 AMD Duron&#153;Processor
10 PowerMac2,1
10 PowerMac4,1
11
12 AMD Duron&#153;
12 PowerMac6,1
13 PowerBook6,1
14 PowerBook5,3
14 PowerBook6,4
14 PowerMac6,3
17 AMD K7
17 Intel&reg; family
17 PowerBook3,5
18 PowerBook4,3
18 PowerBook6,3
18 PowerMac1,1
18 Unknow CPU
23 PowerMac3,4
23 VIA Nehemiah
25 AMD Athlon
25 PowerBook5,2
25 PowerMac4,2
27 PowerBook6,5
28 PowerMac6,4
29 AMD Sempron&#153;
30 PowerMac10,1
33 PowerMac3,3
34 PowerMac5,1
36 AMD Athlon&#153;Processor
36 CPU 586
36 PowerBook5,4
37 RackMac3,1
41 Celeron (Coppermine)
41 PowerMac3,1
42 Genuine Intel&reg;
48 PowerMac4,4
53 Celeron (Mendocino)
61 PowerMac3,5
62 PowerMac8,1
64 AMD-K7&#153; Processor
88 AMD-K6&#153; 3D
88 PowerMac3,6
96 Pentium II
103 Intel&reg; XEON&#153;
118 Intel&reg; Celeron&#153;
126 PowerMac7,3
136 PowerMac7,2
156 Pentium&reg; II
171 AMD Opteron&#153;
197 Pentium&reg; III
200 Mobile AMD
210 Unknown CPU
315 mobile AMD
437 Intel&reg; Celeron&#153;
481 Pentium III
509 AMD Sempron&#153;
958 AMD Duron&#153;
1101 Intel&reg; Xeon&#153;
1106 Mobile Intel&reg;
1149 Pentium
1486 AMD Athlon&#153;
2353 Intel&reg; Celeron&reg;
5404 x86 Family
14178 AMD Athlon&#153;
22560 Intel&reg; Pentium&reg;

Wherever those magic 90% come from?

Well done.
Thanks!

Thanks Willy!

Great job (as always )!