Windows Mobile (Classic, Professional, Standard), Windows Phone 6.x oraz 7/8.x/10 > Pocket PC - ogólnie (WM Classic)
Wydajność kart pamięci w PDA
Marcin1989:
Witam
Zamierzam kupić kartę 8gb sdhc do uniego i nie wiem czy kupować class 2, 4, czy 6? Myślałem na Toshibą bo kingstony strasznie podrabiają. W tej chwili korzystam z PQI 2gb.
McGyver:
lepiej kupować class 6, szybsza będzie
a o to mój test:
karta SanDisc MicroSDHC 8GB [chyba] class 6
--- Cytuj ---* File system read test (unbuffered) - 7.98 MB/sec
* File system read test (buffered) - 10.27 MB/sec
* File system write test (unbuffered) - 1.31 MB/sec
* File system write test (buffered) - 2.53 MB/sec
* File system general test - 13.38 operation
* Low level unbuffered burst read test - 7.31 MB/sec
* Low level buffered burst read test - 41.23 MB/sec
* Low level unbuffered burst write test - 1.88 MB/sec
* Low level buffered burst write test - 8.12 MB/sec
--- Koniec cytatu ---
tak to wygląda:
Unbuffered read, average speed = 7.98 MB/sec
4kb - 1.69 MB/sec
8kb - 3.39 MB/sec
16kb - 6.51 MB/sec
32kb - 10.77 MB/sec
64kb - 20.10 MB/sec
128kb - 19.23 MB/sec
256kb - 11.26 MB/sec
512kb - 8.21 MB/sec
1024kb - 7.23 MB/sec
2MB - 7.70 MB/sec
Buffered read, average speed = 10.27 MB/sec
4kb - 3.90 MB/sec
8kb - 7.81 MB/sec
16kb - 15.62 MB/sec
32kb - 31.25 MB/sec
64kb - 62.50 MB/sec
128kb - 25.00 MB/sec
256kb - 26.38 MB/sec
512kb - 25.25 MB/sec
1024kb - 8.51 MB/sec
2MB - 8.62 MB/sec
File system read test
Unbuffered reads
Buffered reads
4kb - 1.69 MB/sec
4kb - 3.90 MB/sec
8kb - 3.39 MB/sec
8kb - 7.81 MB/sec
16kb - 6.51 MB/sec
16kb - 15.62 MB/sec
32kb - 10.77 MB/sec
32kb - 31.25 MB/sec
64kb - 20.10 MB/sec
64kb - 62.50 MB/sec
128kb - 19.23 MB/sec
128kb - 25.00 MB/sec
256kb - 11.26 MB/sec
256kb - 26.38 MB/sec
512kb - 8.21 MB/sec
512kb - 25.25 MB/sec
1024kb - 8.51 MB/sec
1024kb - 7.23 MB/sec
2MB - 7.70 MB/sec
2MB - 8.62 MB/sec
Unbuffered write, average speed = 1.31 MB/sec
4kb - 47.44 KB/sec
8kb - 264.02 KB/sec
16kb - 573.47 KB/sec
32kb - 1.02 MB/sec
64kb - 294.38 KB/sec
128kb - 377.91 KB/sec
256kb - 953.08 KB/sec
512kb - 868.88 KB/sec
1024kb - 1.41 MB/sec
2MB - 2.67 MB/sec
Buffered write, average speed = 2.53 MB/sec
4kb - 267.85 KB/sec
8kb - 807.69 KB/sec
16kb - 802.25 KB/sec
32kb - 2.34 MB/sec
64kb - 2.82 MB/sec
128kb - 2.60 MB/sec
256kb - 669.93 KB/sec
512kb - 2.36 MB/sec
1024kb - 2.94 MB/sec
2MB - 4.34 MB/sec
File system read test
Unbuffered writes
Buffered writes
4kb - 47.44 KB/sec
4kb - 267.85 KB/sec
8kb - 264.02 KB/sec
8kb - 807.69 KB/sec
16kb - 573.47 KB/sec
16kb - 802.25 KB/sec
32kb - 1.02 MB/sec
32kb - 2.34 MB/sec
64kb - 2.82 MB/sec
64kb - 294.38 KB/sec
128kb - 2.60 MB/sec
128kb - 377.91 KB/sec
256kb - 669.93 KB/sec
256kb - 953.08 KB/sec
512kb - 2.36 MB/sec
512kb - 868.88 KB/sec
1024kb - 2.94 MB/sec
1024kb - 1.41 MB/sec
2MB - 2.67 MB/sec
2MB - 4.34 MB/sec
Buffered sector read, average speed = 41.23 MB/sec
4kb - 19.53 MB/sec
8kb - 39.06 MB/sec
16kb - 39.06 MB/sec
32kb - 52.08 MB/sec
64kb - 44.64 MB/sec
128kb - 43.15 MB/sec
256kb - 43.87 MB/sec
512kb - 42.73 MB/sec
1024kb - 43.87 MB/sec
2MB - 44.34 MB/sec
Unbuffered sector read, average speed = 7.31 MB/sec
4kb - 2.79 MB/sec
8kb - 4.34 MB/sec
16kb - 7.10 MB/sec
32kb - 7.81 MB/sec
64kb - 8.01 MB/sec
128kb - 8.68 MB/sec
256kb - 8.68 MB/sec
512kb - 8.41 MB/sec
1024kb - 8.65 MB/sec
2MB - 8.65 MB/sec
Low-level burst read
Unbuffered reads
Buffered reads
4kb - 2.79 MB/sec
4kb - 19.53 MB/sec
8kb - 4.34 MB/sec
8kb - 39.06 MB/sec
16kb - 7.10 MB/sec
16kb - 39.06 MB/sec
32kb - 7.81 MB/sec
32kb - 52.08 MB/sec
64kb - 8.01 MB/sec
64kb - 44.64 MB/sec
128kb - 8.68 MB/sec
128kb - 43.15 MB/sec
256kb - 8.68 MB/sec
256kb - 43.87 MB/sec
512kb - 8.41 MB/sec
512kb - 42.73 MB/sec
1024kb - 8.65 MB/sec
1024kb - 43.87 MB/sec
2MB - 8.65 MB/sec
2MB - 44.34 MB/sec
Buffered sector write, average speed = 8.12 MB/sec
8kb - 2.14 MB/sec
16kb - 2.69 MB/sec
32kb - 6.65 MB/sec
64kb - 10.78 MB/sec
128kb - 8.71 MB/sec
256kb - 10.91 MB/sec
512kb - 8.40 MB/sec
1024kb - 8.65 MB/sec
2MB - 13.91 MB/sec
Unbuffered sector write, average speed = 1.88 MB/sec
8kb - 1.39 MB/sec
16kb - 282.68 KB/sec
32kb - 2.69 MB/sec
64kb - 927.53 KB/sec
128kb - 1.51 MB/sec
256kb - 1.95 MB/sec
512kb - 2.33 MB/sec
1024kb - 2.96 MB/sec
2MB - 2.94 MB/sec
Low-level burst write
Unbuffered writes
Buffered writes
8kb - 1.39 MB/sec
8kb - 2.14 MB/sec
16kb - 282.68 KB/sec
16kb - 2.69 MB/sec
32kb - 2.69 MB/sec
32kb - 6.65 MB/sec
64kb - 927.53 KB/sec
64kb - 10.78 MB/sec
128kb - 1.51 MB/sec
128kb - 8.71 MB/sec
256kb - 1.95 MB/sec
256kb - 10.91 MB/sec
512kb - 2.33 MB/sec
512kb - 8.40 MB/sec
1024kb - 2.96 MB/sec
1024kb - 8.65 MB/sec
2MB - 2.94 MB/sec
2MB - 13.91 MB/sec
Benchmark results:
Hardware performance index - 441.89
File system performance index - 473.37
File system read test (Unbuffered) - 52.7x [7.71 MB/sec]
File system read test (Buffered) - 66.9x [9.79 MB/sec]
File system write test (Unbuffered) - 10.5x [1.53 MB/sec]
File system write test (Buffered) - 21.2x [3.10 MB/sec]
File system general test - 13.63 operation
Low level unbuffered burst read test - 47.6x [6.97 MB/sec]
Low level buffered burst read test - 269.9x [39.54 MB/sec]
Low level unbuffered burst write test - 11.3x [1.67 MB/sec]
Low level buffered burst write test - 53.4x [7.82 MB/sec]
Podsumowanie:
Żeby osiągnąć maksymalną wydajność w odczycie karty to należy ustawić rozmiar klastra na 32/64kb
A żeby osiągnąć maksymalną wydajność w zapisie karty to należy ustawić rozmiar klastra 1/2MB
I należy wybrać czy chcemy mieć wydajność w odczycie czy w zapisie, normalnie wybierając obojętnie co, możemy tego nie odczuć, ale wykonująć operacje na dużych/bardzo dużych plikach to możemy odczuwać min. spadek wydajności.
a może się mylę to poprawcie :mrgreen:
a może zrobić nowe testy z nowymi PDA ??? po prostu załorzyć nowy temat
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