2-cpu centos 5.7 Post: 302604069

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UNIX Standards and Benchmarks UNIX & LINUX Benchmarks (Version 3.11) UNIX Benchmarks 2-cpu centos 5.7 Post 302604069 by ppchu99 on Friday 2nd of March 2012 09:35:00 PM

03-02-2012

Registered User

2-cpu centos 5.7

Code:

BYTE UNIX Benchmarks (Version 3.11)
  System -- Linux centos1 2.6.18-274.17.1.el5xen #1 SMP Tue Jan 10 18:06:37 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
  Start Benchmark Run: Fri Mar  2 19:42:41 EST 2012
   2 interactive users.
Dhrystone 2 without register variables   6929864.9 lps   (10 secs, 6 samples)
Dhrystone 2 using register variables     6930887.5 lps   (10 secs, 6 samples)
Arithmetic Test (type = arithoh)         312673595.1 lps   (10 secs, 6 samples)
Arithmetic Test (type = register)        450530.0 lps   (10 secs, 6 samples)
Arithmetic Test (type = short)           443763.5 lps   (10 secs, 6 samples)
Arithmetic Test (type = int)             455202.2 lps   (10 secs, 6 samples)
Arithmetic Test (type = long)            267264.1 lps   (10 secs, 6 samples)
Arithmetic Test (type = float)           1128582.0 lps   (10 secs, 6 samples)
Arithmetic Test (type = double)          1036722.8 lps   (10 secs, 6 samples)
System Call Overhead Test                200217.9 lps   (10 secs, 6 samples)
Pipe Throughput Test                     190865.4 lps   (10 secs, 6 samples)
Pipe-based Context Switching Test          no measured results
Process Creation Test                      2076.9 lps   (10 secs, 6 samples)
Execl Throughput Test                      no measured results
File Read  (10 seconds)                  448587.0 KBps  (10 secs, 6 samples)
File Write (10 seconds)                  206581.0 KBps  (10 secs, 6 samples)
File Copy  (10 seconds)                   75720.0 KBps  (10 secs, 6 samples)
File Read  (30 seconds)                  447165.0 KBps  (30 secs, 6 samples)
File Write (30 seconds)                  204872.0 KBps  (30 secs, 6 samples)
File Copy  (30 seconds)                   41221.0 KBps  (30 secs, 6 samples)
C Compiler Test                             568.2 lpm   (60 secs, 3 samples)
Shell scripts (1 concurrent)               1662.7 lpm   (60 secs, 3 samples)
Shell scripts (2 concurrent)               1281.3 lpm   (60 secs, 3 samples)
Shell scripts (4 concurrent)                700.7 lpm   (60 secs, 3 samples)
Shell scripts (8 concurrent)                367.0 lpm   (60 secs, 3 samples)
Dc: sqrt(2) to 99 decimal places          27026.8 lpm   (60 secs, 6 samples)
Recursion Test--Tower of Hanoi           112612.1 lps   (10 secs, 6 samples)


                     INDEX VALUES            
TEST                                        BASELINE     RESULT      INDEX

Arithmetic Test (type = double)               2541.7  1036722.8      407.9
Dhrystone 2 without register variables       22366.3  6929864.9      309.8
Execl Throughput Test                           16.5        0.0        0.0
File Copy  (30 seconds)                        179.0    41221.0      230.3
Pipe-based Context Switching Test             1318.5        0.0        0.0
Shell scripts (8 concurrent)                     4.0      367.0       91.8
                                                                 =========
     SUM of  6 items                                                1039.8
     AVERAGE                                                         173.3

Last edited by radoulov; 03-03-2012 at 03:21 AM..

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LEARN ABOUT DEBIAN

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)