Hi,
I have been playing about with vkernels some more and have noticed
weirdness with time - which i suppose can be more than expected
running in userland.
For example if the real machine is heavily loaded u can get some odd
results when doing stuff in the vkernel:
time sleep 10
0.000u 0.000s 0:27.45 0.0% 0+0k 2+0io 2pf+0w
I was interested to see the performance hit when doing things under
a vkernel. The openssl test runs about 3 times slower in the vkernel
and bonnie is about 1.5 times slower.
Some numbers:
vkernel:
Version: 1.03
vd1# time openssl speed rsa
To get the most accurate results, try to run this
program when this computer is idle.
Doing 512 bit private rsa's for 10s: 5214 512 bit private RSA's in 20.01s
Doing 512 bit public rsa's for 10s: 90278 512 bit public RSA's in 30.05s
Doing 1024 bit private rsa's for 10s: 1002 1024 bit private RSA's in 20.69s
Doing 1024 bit public rsa's for 10s: 28799 1024 bit public RSA's in 30.04s
Doing 2048 bit private rsa's for 10s: 229 2048 bit private RSA's in 29.22s
Doing 2048 bit public rsa's for 10s: 8667 2048 bit public RSA's in 30.01s
Doing 4096 bit private rsa's for 10s: 36 4096 bit private RSA's in 30.21s
Doing 4096 bit public rsa's for 10s: 2479 4096 bit public RSA's in 30.04s
OpenSSL 0.9.8e 23 Feb 2007
built on: Mon Apr 2 20:27:45 BST 2007
options:bn(64,32) md2(int) rc4(idx,int) des(ptr,risc1,16,long) aes(partial)
blowfish(idx)
compiler: cc
available timing options: USE_TOD HZ=128 [sysconf value]
timing function used: getrusage
sign verify sign/s verify/s
rsa 512 bits 0.003838s 0.000333s 260.5 3004.3
rsa 1024 bits 0.020647s 0.001043s 48.4 958.6
rsa 2048 bits 0.127594s 0.003462s 7.8 288.8
rsa 4096 bits 0.839179s 0.012118s 1.2 82.5
221.309u 0.564s 3:41.90 99.9% 124+53k 12+0io 16pf+0w
Real:
dfly# time openssl speed rsa
To get the most accurate results, try to run this
program when this computer is idle.
Doing 512 bit private rsa's for 10s: 2610 512 bit private RSA's in 9.98s
Doing 512 bit public rsa's for 10s: 29827 512 bit public RSA's in 9.99s
Doing 1024 bit private rsa's for 10s: 486 1024 bit private RSA's in 10.00s
Doing 1024 bit public rsa's for 10s: 9735 1024 bit public RSA's in 10.01s
Doing 2048 bit private rsa's for 10s: 79 2048 bit private RSA's in 10.02s
Doing 2048 bit public rsa's for 10s: 2912 2048 bit public RSA's in 10.02s
Doing 4096 bit private rsa's for 10s: 12 4096 bit private RSA's in 10.00s
Doing 4096 bit public rsa's for 10s: 830 4096 bit public RSA's in 10.01s
OpenSSL 0.9.8e 23 Feb 2007
built on: Mon Apr 2 20:27:45 BST 2007
options:bn(64,32) md2(int) rc4(idx,int) des(ptr,risc1,16,long) aes(partial)
blowfish(idx)
compiler: cc
available timing options: USE_TOD HZ=128 [sysconf value]
timing function used: getrusage
sign verify sign/s verify/s
rsa 512 bits 0.003822s 0.000335s 261.6 2984.9
rsa 1024 bits 0.020577s 0.001028s 48.6 972.8
rsa 2048 bits 0.126784s 0.003440s 7.9 290.7
rsa 4096 bits 0.833317s 0.012066s 1.2 82.9
81.100u 0.031s 1:21.35 99.7% 172+74k 0+0io 0pf+0w
Virtual:
time bonnie++
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
vd1.mw.office 300M 10330 100 18007 100 5532 99 11184 100 17143 99 57.7 99
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 2011 99 12573 99 6832 100 2691 100 13393 99 4686 100
vd1.mw.office,300M,10330,100,18007,100,5532,99,11184,100,17143,99,57.7,99,16,2011,99,12573,99,6832,100,2691,100,13393,99,4686,100
49.217u 263.608s 5:23.28 96.7% 11+52k 922+209492io 0pf+0w
Real:
time bonnie++
Writing with putc()...done
Writing intelligently...done
Rewriting...done
Reading with getc()...done
Reading intelligently...done
start 'em...done...done...done...
Create files in sequential order...done.
Stat files in sequential order...done.
Delete files in sequential order...done.
Create files in random order...done.
Stat files in random order...done.
Delete files in random order...done.
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dfly.mw.office 300M 14645 87 19324 16 6945 4 17071 87 18485 6 123.9 0
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 5521 31 26859 81 14964 69 10203 57 20245 51 14779 62
dfly.mw.office,300M,14645,87,19324,16,6945,4,17071,87,18485,6,123.9,0,16,5521,31,26859,81,14964,69,10203,57,20245,51,14779,62
31.322u 13.401s 3:16.31 22.7% 17+80k 1246+9600io 4pf+0w
Mike.
