Divnovypisy

[Cejka Rudolf]

Zkusil jsem poustet nasledujici davku na Debian 2.0:
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(
OUT=/tmp/ble
/usr/bin/time -v sh -c \
	"dd bs=1024 count=10240 if=/dev/zero of=$OUT ; sync ; rm $OUT"
) 2>&1 | tee xx$1.out
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A vypsalo se mi toto:

--------------------------------------------------------------------------
10240+0 records in
10240+0 records out
	Command being timed: "sh -c dd bs=1024 count=10240 if=/dev/zero of=/tmp/ble ; sync ; rm /tmp/ble"
	User time (seconds): 0.13
	System time (seconds): 2.01
	Percent of CPU this job got: 48%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 0:04.40
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 0
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 434
	Minor (reclaiming a frame) page faults: 105
	Voluntary context switches: 0
	Involuntary context switches: 0
	Swaps: 0
	File system inputs: 0
	File system outputs: 0
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0
--------------------------------------------------------------------------

Jenze se mi nechce verit, ze by
1) mereny proces v pameti nezabiral zadne misto (6 radku: maximum/average
   shared/unshared/stack/total/resident set size);
2) mereny proces nebyl nikdy prepnut (2 radky: voluntary/involuntary
   context switches);
3) mereny proces neprovadel zadne I/O operace (2 radky: file system
   inputs/outputs).

Dava nekomu vyse uvedena testovaci davka rozumnejsi vysledky?
Nebo je nejaky lepsi zpusob, jak takoveto parametry na Linuxu zjistit?

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Rudolf Cejka  (cejkar na dcse.fee.vutbr.cz;  http://www.fee.vutbr.cz/~cejkar)
Technical University of Brno, Faculty of El. Engineering and Comp. Science
Bozetechova 2, 612 66  Brno, Czech Republic