[Xperia Arc Android Development] umaturman:
Samsung EVO (orange one) 32Gb microSD card performance

I got tired of lags and decided to find out what's wrong with my urushi. So I ran vmstat with a 1 sec interval between and tapped YouTube app. Here the logs:

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----

r b swpd free buff cache si so bi bo in cs us sy id wa

0 0 37960 56556 4 176148 9 28 3883 101 0 3971 21 11 57 11

0 0 37960 56556 4 176148 0 0 0 0 0 29 0 0 100 0

0 0 37960 55000 4 178368 4 0 2224 0 0 348 4 4 85 7

2 1 37960 51688 4 178920 0 0 448 0 0 1207 16 5 78 1

0 3 37960 55628 4 183972 0 0 4340 8 0 6165 46 30 19 5

0 0 37960 48680 4 182940 0 0 164 108 0 2708 30 10 41 19

1 2 37960 48176 4 183024 0 0 20 8 0 3215 42 16 35 7

[COLOR="Red"]1 1 37960 50424 4 189892 48 0 12936 84 0 5203 40 23 0 36

0 4 37960 37044 4 201876 8 0 18364 0 0 5599 36 16 0 47

1 5 37960 28076 4 215356 0 0 18896 4 0 2628 21 3 0 76

0 4 37996 28928 4 213224 4 36 15072 48 0 4417 18 13 0 69

0 4 37996 25868 4 211496 0 0 8016 96 0 5599 54 29 0 17

4 1 37996 28008 4 206544 0 0 9272 104 0 5821 53 23 0 24

0 4 37996 26096 4 207388 4 0 16396 80 0 4572 35 13 0 52

2 1 37996 24712 4 208104 0 4 10980 108 0 4303 46 12 0 41

0 4 38076 35492 4 197020 0 88 17676 100 0 2754 38 8 0 54

1 4 38248 28180 4 203132 0 172 17136 176 0 4033 15 11 0 73

3 4 38316 20872 4 201676 4 68 17096 68 0 4107 41 30 0 29[/COLOR]

0 1 38316 29608 4 200104 4 0 8536 136 0 2461 41 20 0 40

1 0 38316 30360 4 199320 0 0 136 0 0 1099 11 16 61 11

1 3 38316 29684 4 199492 0 0 1948 8 0 1862 26 11 59 4

3 1 38316 27236 4 198264 0 0 3516 16 0 3587 71 13 0 15

0 0 38316 29392 4 195224 0 0 1228 0 0 2578 31 15 28 26

4 2 38316 28392 4 195604 0 0 2004 0 0 3011 53 20 14 13

0 1 38316 29884 4 194340 0 0 0 0 0 2328 28 11 22 39

6 1 38316 23704 4 198464 0 0 6476 0 0 3351 30 18 31 22

3 3 38312 23256 4 194804 4 0 3144 20 0 5722 71 28 0 1

10 2 38336 20980 4 184764 0 24 2920 28 0 6117 58 39 0 3

2 7 38480 23180 4 180932 0 144 16784 156 0 8497 49 32 0 19

6 2 38520 20928 4 181888 4 44 15240 48 0 6646 65 24 0 12

8 3 38548 17836 4 180808 0 28 8032 28 0 6203 62 34 0 4

8 1 38552 16652 4 180212 0 4 14336 8 0 7860 65 32 0 3

5 6 38576 17028 4 178624 0 24 14860 348 0 7397 33 27 0 40

7 5 38608 18712 4 172920 12 32 14608 68 0 7626 53 36 0 11

0 4 38612 16992 4 173072 0 4 16548 108 0 6874 45 34 0 21

11 4 38664 14792 4 168944 0 96 18480 236 0 9745 54 27 0 19

12 5 38700 13556 4 170180 0 128 17372 276 0 11072 48 28 0 24

1 8 38756 14552 4 167824 0 56 17968 148 0 7262 54 36 0 10

2 9 38824 15060 4 161976 0 68 11628 152 0 8159 55 39 0 6

11 10 38840 14572 4 162532 0 72 19552 88 0 7591 48 34 0 19

8 11 38852 12744 4 164388 0 52 18940 224 0 13535 35 38 0 27

11 7 38852 12988 4 168108 0 0 11736 224 0 8076 54 40 0 6

8 5 38852 12608 4 166776 0 0 16568 36 0 6899 55 45 0 0

8 4 38852 11112 4 167936 0 0 14712 28 0 6342 42 58 0 0

11 1 38852 13060 4 166132 4 4 6948 4 0 6372 65 35 0 0

11 8 38848 12148 4 161388 4 4 12100 12 0 8504 70 30 0 0

9 4 38864 13544 4 157628 0 16 13208 24 1 8252 58 42 0 0

14 4 38864 12852 4 157572 0 0 7620 44 0 7833 60 40 0 0

13 2 38868 18044 4 154000 0 4 10876 120 0 8186 52 48 0 0

10 4 38916 22548 4 151168 16 48 5804 436 0 11563 72 28 0 0

Well this is unsettling :) I think I need to buy a faster SD card once more :cool:

Update: It seems the samsung sd card has a good performance. I restored Kernel Adiutor app from my cm11 titanium backup. There was 3072Kb value in readahead... Back to 128Kb, happy now, everything is smooth.