ぱんでも

にうむ

SDカードのベンチマークを測ってみた

32GBのSDカードを購入.まさか2000円を割っているとは….

Lexar SDHCカード Class10 UHS-1 32GB [フラストレーションフリーパッケージ (FFP)] LSD32GBJ200

Lexar SDHCカード Class10 UHS-1 32GB [フラストレーションフリーパッケージ (FFP)] LSD32GBJ200

せっかくだからiozoneでベンチマークを測ってみた. ターミナルからcdコマンドでSDカードへ移動.次のコマンドを実行した.

$ iozone -t 2 -s 512M -r 128K -i 0 -i 1 -i 2

	Iozone: Performance Test of File I/O
	        Version $Revision: 3.413 $
		Compiled for 64 bit mode.
		Build: macosx 

	Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
	             Al Slater, Scott Rhine, Mike Wisner, Ken Goss
	             Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
	             Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
	             Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
	             Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
	             Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
	             Ben England.

	Run began: Tue Jan 29 23:00:04 2013

	File size set to 524288 KB
	Record Size 128 KB
	Command line used: iozone -t 2 -s 512M -r 128K -i 0 -i 1 -i 2
	Output is in Kbytes/sec
	Time Resolution = 0.000001 seconds.
	Processor cache size set to 1024 Kbytes.
	Processor cache line size set to 32 bytes.
	File stride size set to 17 * record size.
	Throughput test with 2 processes
	Each process writes a 524288 Kbyte file in 128 Kbyte records

	Children see throughput for  2 initial writers 	=   29047.11 KB/sec
	Parent sees throughput for  2 initial writers 	=   26677.55 KB/sec
	Min throughput per process 			=   14307.64 KB/sec 
	Max throughput per process 			=   14739.47 KB/sec
	Avg throughput per process 			=   14523.56 KB/sec
	Min xfer 					=  508928.00 KB

	Children see throughput for  2 rewriters 	=   30469.63 KB/sec
	Parent sees throughput for  2 rewriters 	=   28157.35 KB/sec
	Min throughput per process 			=   12306.44 KB/sec 
	Max throughput per process 			=   18163.20 KB/sec
	Avg throughput per process 			=   15234.82 KB/sec
	Min xfer 					=  405760.00 KB

	Children see throughput for  2 readers 		= 9793642.50 KB/sec
	Parent sees throughput for  2 readers 		= 9765756.47 KB/sec
	Min throughput per process 			= 4874730.50 KB/sec 
	Max throughput per process 			= 4918912.00 KB/sec
	Avg throughput per process 			= 4896821.25 KB/sec
	Min xfer 					=  519680.00 KB

	Children see throughput for 2 re-readers 	= 9261350.00 KB/sec
	Parent sees throughput for 2 re-readers 	= 9236118.61 KB/sec
	Min throughput per process 			= 4560983.50 KB/sec 
	Max throughput per process 			= 4700366.50 KB/sec
	Avg throughput per process 			= 4630675.00 KB/sec
	Min xfer 					=  508928.00 KB

	Children see throughput for 2 random readers 	= 10001251.00 KB/sec
	Parent sees throughput for 2 random readers 	= 9971483.59 KB/sec
	Min throughput per process 			= 4963845.00 KB/sec 
	Max throughput per process 			= 5037406.00 KB/sec
	Avg throughput per process 			= 5000625.50 KB/sec
	Min xfer 					=  516736.00 KB

	Children see throughput for 2 random writers 	=    2108.68 KB/sec
	Parent sees throughput for 2 random writers 	=     799.42 KB/sec
	Min throughput per process 			=     277.28 KB/sec 
	Max throughput per process 			=    1831.40 KB/sec
	Avg throughput per process 			=    1054.34 KB/sec
	Min xfer 					=  130560.00 KB



iozone test complete.