I know you are all dying to know how my progress has been going on the Raspberry Pi Android port. Well, it's coming along.
The Raspberry Pi currently uses a 3.1.9 ARM Linux kernel. The version of Android I decided to port over uses the 3.0.8 ARM kernel. To patch the 3.1.9 ARM kernel with Android, I had to go a circuitous route.
It would have been pretty easy if there were patches already out there that were JUST Android patches. I couldn't find any. I'm sure there is a way, using Git, to isolate the Android patches from the Git Android repository, but I haven't spent enough time playing with Git to do it. So, I went the old fashioned way.
To create my own isolated Android patch, I first needed to find an Android running on a 3.x.x version of the kernel. Ice Cream Sandwich is running against a 3.0.8 kernel (at the time I did this post) so that is where I started. The trick was to not include any ARM patches with the isolated Android patch because I needed to keep all of the Raspberry Pi ARM changes in tact.
So, starting with an x86 3.0.8 Android kernel I found, I created a patch from stock x86 3.0.8 to Android x86 3.0.8. That gave me an isolated Android patch. Then I applied that isolated Android patch to the 3.1.9 Raspberry Pi kernel. That took my Raspberry Pi kernel to an Android kernel.
Now I need to make the modifications to the Ice Cream Sandwich Android to make it a Headless Ice Cream Sandwich (in the shape of an Android, of course.)
Note:
Why x86? Well, that's a good question.
In order to get a clean isolated Android patch I needed to start with something that I could:
a) get a good clean stock kernel for, and
b) if there were unnecessary changes to the architecture or driver files they wouldn't affect and ARM system.
I could have attempted an ARM 3.x.x kernel but it's pretty hard to find an ARM kernel (of the 3.x.x revision) with an matching ARM kernel with Android that you would have confidence that the ARM portion is all the same. At least the x86 stuff is fairly well known and consistent.
Stay tuned, more to come!
Tuesday, April 24, 2012
Tuesday, April 17, 2012
Memory Comparisons - Headless Android vs. Full Android
After some questions on the blog about memory comparisons, I pulled some information together off of my Freescale development board. Here is the information I've pulled together. From what I see the information shows:
MemFree difference = 337320 kB - 265888 kB = 71432 kB saved (21%)
The other interesting one is with the Active in each case:
Active difference = 95892 kB - 44632 kB = 51260 kB saved (53%)
Here is the raw information from the memory usage off of my development board.
Using the standard Android image with no Headless Android changes:
Free shows:
# busybox free
total used free shared buffers
Mem: 442740 177932 264808 0 2000
Swap: 0 0 0
Total: 442740 177932 264808
Here is the meminfo off of the development board.
# cat /proc/meminfo
MemTotal: 442740 kB
MemFree: 265888 kB
Buffers: 2000 kB
Cached: 79248 kB
SwapCached: 0 kB
Active: 95892 kB
Inactive: 46456 kB
Active(anon): 61140 kB
Inactive(anon): 328 kB
Active(file): 34752 kB
Inactive(file): 46128 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 442740 kB
LowFree: 265888 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 61108 kB
Mapped: 32100 kB
Shmem: 372 kB
Slab: 7888 kB
SReclaimable: 4164 kB
SUnreclaim: 3724 kB
KernelStack: 2056 kB
PageTables: 6276 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 221368 kB
Committed_AS: 929976 kB
VmallocTotal: 1433600 kB
VmallocUsed: 85784 kB
VmallocChunk: 1320964 kB
With the following process list.
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800e9ea4 0000875c S /init
root 2 0 0 0 80080268 00000000 S kthreadd
root 3 2 0 0 8006f8b4 00000000 S ksoftirqd/0
root 4 2 0 0 8007cacc 00000000 S events/0
root 5 2 0 0 8007cacc 00000000 S khelper
root 8 2 0 0 80086f80 00000000 S async/mgr
root 9 2 0 0 8007cacc 00000000 S pm
root 12 2 0 0 8007cacc 00000000 S suspend
root 81 2 0 0 800558a0 00000000 S usb_wakeup thre
root 82 2 0 0 800558a0 00000000 S usb_wakeup thre
root 240 2 0 0 800b925c 00000000 S sync_supers
root 242 2 0 0 800b9d3c 00000000 S bdi-default
root 244 2 0 0 8007cacc 00000000 S kblockd/0
root 258 2 0 0 8007cacc 00000000 S mxc_spi.0
root 266 2 0 0 8007cacc 00000000 S otg_switch/0
root 272 2 0 0 80294ca8 00000000 S khubd
root 295 2 0 0 8007cacc 00000000 S kmmcd
root 309 2 0 0 80315228 00000000 S pmic-event-thre
root 373 2 0 0 8007cacc 00000000 S rpciod/0
root 393 2 0 0 800b3904 00000000 S kswapd0
root 441 2 0 0 8007cacc 00000000 S aio/0
root 451 2 0 0 8007cacc 00000000 S nfsiod
root 455 2 0 0 8007cacc 00000000 S crypto/0
root 1073 2 0 0 8022bd8c 00000000 S kapmd
root 1148 2 0 0 802bb8d4 00000000 S file-storage
root 1199 2 0 0 8007cacc 00000000 S kstriped
root 1204 2 0 0 8007cacc 00000000 S kconservative/0
root 1209 2 0 0 8007cacc 00000000 S vpu_wq/0
root 1216 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1219 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1228 2 0 0 8007cacc 00000000 S usbhid_resumer
root 1231 2 0 0 8007cacc 00000000 S binder
root 1250 2 0 0 8032eefc 00000000 S mmcqd
root 1289 2 0 0 8007cacc 00000000 S l2cap
root 1290 2 0 0 804517f4 00000000 S krfcommd
root 1302 2 0 0 80315c1c 00000000 S mxc_ts
root 1303 1 300 156 800e9ea4 0000875c S /sbin/ueventd
root 1485 2 0 0 80247e28 00000000 S scsi_eh_0
root 1487 2 0 0 802aef98 00000000 S usb-storage
root 2147 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p2-
root 2148 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2149 2 0 0 800f9d94 00000000 S flush-179:0
root 2150 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p5-
root 2151 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2152 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p6-
root 2153 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2155 1 744 328 8006d5a0 6fd0c3ac S /system/bin/sh
system 2156 1 816 272 80343750 6fd0b6fc S /system/bin/servicemanager
root 2157 1 3872 588 ffffffff 6fd0bdac S /system/bin/vold
root 2158 1 3872 576 ffffffff 6fd0bdac S /system/bin/netd
root 2159 1 820 320 800e9ea4 6fd0b844 S /system/bin/dispd
root 2160 1 676 256 8037b6ac 6fd0c0cc S /system/bin/debuggerd
root 2161 1 83416 27160 800e9ea4 6fd0b844 S zygote
media 2162 1 27572 5492 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 2163 1 1264 696 800e9ea4 6fd0c59c S /system/bin/dbus-daemon
root 2164 1 824 332 803fd98c 6fd0b45c S /system/bin/installd
keystore 2165 1 1752 424 8037b6ac 6fd0c0cc S /system/bin/keystore
radio 2166 1 5460 700 ffffffff 6fd0bdac S /system/bin/rild
root 2230 2 0 0 80247e28 00000000 S scsi_eh_1
root 2231 2 0 0 802aef98 00000000 S usb-storage
system 2256 2161 192540 38596 ffffffff 6fd0b6fc S system_server
root 2266 2 0 0 8007cacc 00000000 S z1xx_workq
app_17 2410 2161 99260 19152 ffffffff 6fd0c51c S com.android.inputmethod.latin
radio 2417 2161 109916 20816 ffffffff 6fd0c51c S com.android.phone
system 2419 2161 140892 20728 ffffffff 6fd0c51c S com.android.systemui
app_16 2485 2161 98312 22172 ffffffff 6fd0c51c S com.android.launcher
app_1 2498 2161 104776 22132 ffffffff 6fd0c51c S android.process.acore
app_11 2529 2161 105400 17672 ffffffff 6fd0c51c S com.android.mms
app_12 2534 2161 94620 17996 ffffffff 6fd0c51c S android.process.media
app_20 2558 2161 94648 17988 ffffffff 6fd0c51c S com.android.email
app_21 2568 2161 93140 16192 ffffffff 6fd0c51c S com.android.deskclock
app_26 2583 2161 92336 16520 ffffffff 6fd0c51c S com.android.providers.calendar
app_30 2593 2161 92368 16312 ffffffff 6fd0c51c S com.android.bluetooth
app_5 2600 2161 92172 15680 ffffffff 6fd0c51c S com.android.quicksearchbox
app_7 2611 2161 91804 14856 ffffffff 6fd0c51c S com.android.protips
app_10 2623 2161 92340 15004 ffffffff 6fd0c51c S com.android.music
app_19 2630 2161 93468 16588 ffffffff 6fd0c51c S com.cooliris.media
root 2766 2155 904 312 00000000 6fd0b45c R ps
Using the Headless Android image on my development board.
Free shows:
# busybox free
total used free shared buffers
Mem: 442740 105240 337500 0 1464
Swap: 0 0 0
Total: 442740 105240 337500
Meminfo after five minutes shows:
# cat /proc/meminfo
MemTotal: 442740 kB
MemFree: 337320 kB
Buffers: 1464 kB
Cached: 57140 kB
SwapCached: 0 kB
Active: 44632 kB
Inactive: 35124 kB
Active(anon): 21168 kB
Inactive(anon): 200 kB
Active(file): 23464 kB
Inactive(file): 34924 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 442740 kB
LowFree: 337320 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 21160 kB
Mapped: 21564 kB
Shmem: 220 kB
Slab: 6108 kB
SReclaimable: 3268 kB
SUnreclaim: 2840 kB
KernelStack: 832 kB
PageTables: 1384 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 221368 kB
Committed_AS: 173048 kB
VmallocTotal: 1433600 kB
VmallocUsed: 69096 kB
VmallocChunk: 1343484 kB
With the following ps list:
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800e9ea4 0000875c S /init
root 2 0 0 0 80080268 00000000 S kthreadd
root 3 2 0 0 8006f8b4 00000000 S ksoftirqd/0
root 4 2 0 0 8007cacc 00000000 S events/0
root 5 2 0 0 8007cacc 00000000 S khelper
root 8 2 0 0 80086f80 00000000 S async/mgr
root 9 2 0 0 8007cacc 00000000 S pm
root 12 2 0 0 8007cacc 00000000 S suspend
root 81 2 0 0 800558a0 00000000 S usb_wakeup thre
root 82 2 0 0 800558a0 00000000 S usb_wakeup thre
root 240 2 0 0 800b925c 00000000 S sync_supers
root 242 2 0 0 800b9d3c 00000000 S bdi-default
root 244 2 0 0 8007cacc 00000000 S kblockd/0
root 258 2 0 0 8007cacc 00000000 S mxc_spi.0
root 266 2 0 0 8007cacc 00000000 S otg_switch/0
root 272 2 0 0 80294ca8 00000000 S khubd
root 295 2 0 0 8007cacc 00000000 S kmmcd
root 309 2 0 0 80315228 00000000 S pmic-event-thre
root 373 2 0 0 8007cacc 00000000 S rpciod/0
root 393 2 0 0 800b3904 00000000 S kswapd0
root 441 2 0 0 8007cacc 00000000 S aio/0
root 451 2 0 0 8007cacc 00000000 S nfsiod
root 455 2 0 0 8007cacc 00000000 S crypto/0
root 1073 2 0 0 8022bd8c 00000000 S kapmd
root 1148 2 0 0 802bb8d4 00000000 S file-storage
root 1199 2 0 0 8007cacc 00000000 S kstriped
root 1204 2 0 0 8007cacc 00000000 S kconservative/0
root 1209 2 0 0 8007cacc 00000000 S vpu_wq/0
root 1216 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1219 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1228 2 0 0 8007cacc 00000000 S usbhid_resumer
root 1231 2 0 0 8007cacc 00000000 S binder
root 1250 2 0 0 8032eefc 00000000 S mmcqd
root 1289 2 0 0 8007cacc 00000000 S l2cap
root 1290 2 0 0 804517f4 00000000 S krfcommd
root 1302 2 0 0 80315c1c 00000000 S mxc_ts
root 1303 1 300 156 800e9ea4 0000875c S /sbin/ueventd
root 1489 2 0 0 80247e28 00000000 S scsi_eh_0
root 1491 2 0 0 802aef98 00000000 S usb-storage
root 2147 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p2-
root 2148 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2149 2 0 0 800f9d94 00000000 S flush-179:0
root 2150 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p5-
root 2151 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2152 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p6-
root 2153 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2155 1 744 340 8006d5a0 6fd0c3ac S /system/bin/sh
system 2156 1 816 252 80343750 6fd0b6fc S /system/bin/servicemanager
root 2157 1 3872 564 ffffffff 6fd0bdac S /system/bin/vold
root 2158 1 3868 572 ffffffff 6fd0bdac S /system/bin/netd
root 2159 1 820 320 800e9ea4 6fd0b844 S /system/bin/dispd
root 2160 1 676 256 8037b6ac 6fd0c0cc S /system/bin/debuggerd
root 2161 1 83412 27140 800e9ea4 6fd0b844 S zygote
media 2162 1 24300 5232 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 2163 1 1264 564 800e9ea4 6fd0c59c S /system/bin/dbus-daemon
root 2164 1 824 336 803fd98c 6fd0b45c S /system/bin/installd
keystore 2165 1 1752 424 8037b6ac 6fd0c0cc S /system/bin/keystore
radio 2166 1 4444 672 ffffffff 6fd0bdac S /system/bin/rild
root 2230 2 0 0 80247e28 00000000 S scsi_eh_1
root 2231 2 0 0 802aef98 00000000 S usb-storage
system 2255 2161 130548 30352 ffffffff 6fd0b6fc S system_server
root 2381 2155 904 308 00000000 6fd0b45c R ps
MemFree difference = 337320 kB - 265888 kB = 71432 kB saved (21%)
The other interesting one is with the Active in each case:
Active difference = 95892 kB - 44632 kB = 51260 kB saved (53%)
Here is the raw information from the memory usage off of my development board.
Using the standard Android image with no Headless Android changes:
Free shows:
# busybox free
total used free shared buffers
Mem: 442740 177932 264808 0 2000
Swap: 0 0 0
Total: 442740 177932 264808
Here is the meminfo off of the development board.
# cat /proc/meminfo
MemTotal: 442740 kB
MemFree: 265888 kB
Buffers: 2000 kB
Cached: 79248 kB
SwapCached: 0 kB
Active: 95892 kB
Inactive: 46456 kB
Active(anon): 61140 kB
Inactive(anon): 328 kB
Active(file): 34752 kB
Inactive(file): 46128 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 442740 kB
LowFree: 265888 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 61108 kB
Mapped: 32100 kB
Shmem: 372 kB
Slab: 7888 kB
SReclaimable: 4164 kB
SUnreclaim: 3724 kB
KernelStack: 2056 kB
PageTables: 6276 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 221368 kB
Committed_AS: 929976 kB
VmallocTotal: 1433600 kB
VmallocUsed: 85784 kB
VmallocChunk: 1320964 kB
With the following process list.
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800e9ea4 0000875c S /init
root 2 0 0 0 80080268 00000000 S kthreadd
root 3 2 0 0 8006f8b4 00000000 S ksoftirqd/0
root 4 2 0 0 8007cacc 00000000 S events/0
root 5 2 0 0 8007cacc 00000000 S khelper
root 8 2 0 0 80086f80 00000000 S async/mgr
root 9 2 0 0 8007cacc 00000000 S pm
root 12 2 0 0 8007cacc 00000000 S suspend
root 81 2 0 0 800558a0 00000000 S usb_wakeup thre
root 82 2 0 0 800558a0 00000000 S usb_wakeup thre
root 240 2 0 0 800b925c 00000000 S sync_supers
root 242 2 0 0 800b9d3c 00000000 S bdi-default
root 244 2 0 0 8007cacc 00000000 S kblockd/0
root 258 2 0 0 8007cacc 00000000 S mxc_spi.0
root 266 2 0 0 8007cacc 00000000 S otg_switch/0
root 272 2 0 0 80294ca8 00000000 S khubd
root 295 2 0 0 8007cacc 00000000 S kmmcd
root 309 2 0 0 80315228 00000000 S pmic-event-thre
root 373 2 0 0 8007cacc 00000000 S rpciod/0
root 393 2 0 0 800b3904 00000000 S kswapd0
root 441 2 0 0 8007cacc 00000000 S aio/0
root 451 2 0 0 8007cacc 00000000 S nfsiod
root 455 2 0 0 8007cacc 00000000 S crypto/0
root 1073 2 0 0 8022bd8c 00000000 S kapmd
root 1148 2 0 0 802bb8d4 00000000 S file-storage
root 1199 2 0 0 8007cacc 00000000 S kstriped
root 1204 2 0 0 8007cacc 00000000 S kconservative/0
root 1209 2 0 0 8007cacc 00000000 S vpu_wq/0
root 1216 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1219 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1228 2 0 0 8007cacc 00000000 S usbhid_resumer
root 1231 2 0 0 8007cacc 00000000 S binder
root 1250 2 0 0 8032eefc 00000000 S mmcqd
root 1289 2 0 0 8007cacc 00000000 S l2cap
root 1290 2 0 0 804517f4 00000000 S krfcommd
root 1302 2 0 0 80315c1c 00000000 S mxc_ts
root 1303 1 300 156 800e9ea4 0000875c S /sbin/ueventd
root 1485 2 0 0 80247e28 00000000 S scsi_eh_0
root 1487 2 0 0 802aef98 00000000 S usb-storage
root 2147 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p2-
root 2148 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2149 2 0 0 800f9d94 00000000 S flush-179:0
root 2150 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p5-
root 2151 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2152 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p6-
root 2153 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2155 1 744 328 8006d5a0 6fd0c3ac S /system/bin/sh
system 2156 1 816 272 80343750 6fd0b6fc S /system/bin/servicemanager
root 2157 1 3872 588 ffffffff 6fd0bdac S /system/bin/vold
root 2158 1 3872 576 ffffffff 6fd0bdac S /system/bin/netd
root 2159 1 820 320 800e9ea4 6fd0b844 S /system/bin/dispd
root 2160 1 676 256 8037b6ac 6fd0c0cc S /system/bin/debuggerd
root 2161 1 83416 27160 800e9ea4 6fd0b844 S zygote
media 2162 1 27572 5492 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 2163 1 1264 696 800e9ea4 6fd0c59c S /system/bin/dbus-daemon
root 2164 1 824 332 803fd98c 6fd0b45c S /system/bin/installd
keystore 2165 1 1752 424 8037b6ac 6fd0c0cc S /system/bin/keystore
radio 2166 1 5460 700 ffffffff 6fd0bdac S /system/bin/rild
root 2230 2 0 0 80247e28 00000000 S scsi_eh_1
root 2231 2 0 0 802aef98 00000000 S usb-storage
system 2256 2161 192540 38596 ffffffff 6fd0b6fc S system_server
root 2266 2 0 0 8007cacc 00000000 S z1xx_workq
app_17 2410 2161 99260 19152 ffffffff 6fd0c51c S com.android.inputmethod.latin
radio 2417 2161 109916 20816 ffffffff 6fd0c51c S com.android.phone
system 2419 2161 140892 20728 ffffffff 6fd0c51c S com.android.systemui
app_16 2485 2161 98312 22172 ffffffff 6fd0c51c S com.android.launcher
app_1 2498 2161 104776 22132 ffffffff 6fd0c51c S android.process.acore
app_11 2529 2161 105400 17672 ffffffff 6fd0c51c S com.android.mms
app_12 2534 2161 94620 17996 ffffffff 6fd0c51c S android.process.media
app_20 2558 2161 94648 17988 ffffffff 6fd0c51c S com.android.email
app_21 2568 2161 93140 16192 ffffffff 6fd0c51c S com.android.deskclock
app_26 2583 2161 92336 16520 ffffffff 6fd0c51c S com.android.providers.calendar
app_30 2593 2161 92368 16312 ffffffff 6fd0c51c S com.android.bluetooth
app_5 2600 2161 92172 15680 ffffffff 6fd0c51c S com.android.quicksearchbox
app_7 2611 2161 91804 14856 ffffffff 6fd0c51c S com.android.protips
app_10 2623 2161 92340 15004 ffffffff 6fd0c51c S com.android.music
app_19 2630 2161 93468 16588 ffffffff 6fd0c51c S com.cooliris.media
root 2766 2155 904 312 00000000 6fd0b45c R ps
Using the Headless Android image on my development board.
Free shows:
# busybox free
total used free shared buffers
Mem: 442740 105240 337500 0 1464
Swap: 0 0 0
Total: 442740 105240 337500
Meminfo after five minutes shows:
# cat /proc/meminfo
MemTotal: 442740 kB
MemFree: 337320 kB
Buffers: 1464 kB
Cached: 57140 kB
SwapCached: 0 kB
Active: 44632 kB
Inactive: 35124 kB
Active(anon): 21168 kB
Inactive(anon): 200 kB
Active(file): 23464 kB
Inactive(file): 34924 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 442740 kB
LowFree: 337320 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 21160 kB
Mapped: 21564 kB
Shmem: 220 kB
Slab: 6108 kB
SReclaimable: 3268 kB
SUnreclaim: 2840 kB
KernelStack: 832 kB
PageTables: 1384 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 221368 kB
Committed_AS: 173048 kB
VmallocTotal: 1433600 kB
VmallocUsed: 69096 kB
VmallocChunk: 1343484 kB
With the following ps list:
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800e9ea4 0000875c S /init
root 2 0 0 0 80080268 00000000 S kthreadd
root 3 2 0 0 8006f8b4 00000000 S ksoftirqd/0
root 4 2 0 0 8007cacc 00000000 S events/0
root 5 2 0 0 8007cacc 00000000 S khelper
root 8 2 0 0 80086f80 00000000 S async/mgr
root 9 2 0 0 8007cacc 00000000 S pm
root 12 2 0 0 8007cacc 00000000 S suspend
root 81 2 0 0 800558a0 00000000 S usb_wakeup thre
root 82 2 0 0 800558a0 00000000 S usb_wakeup thre
root 240 2 0 0 800b925c 00000000 S sync_supers
root 242 2 0 0 800b9d3c 00000000 S bdi-default
root 244 2 0 0 8007cacc 00000000 S kblockd/0
root 258 2 0 0 8007cacc 00000000 S mxc_spi.0
root 266 2 0 0 8007cacc 00000000 S otg_switch/0
root 272 2 0 0 80294ca8 00000000 S khubd
root 295 2 0 0 8007cacc 00000000 S kmmcd
root 309 2 0 0 80315228 00000000 S pmic-event-thre
root 373 2 0 0 8007cacc 00000000 S rpciod/0
root 393 2 0 0 800b3904 00000000 S kswapd0
root 441 2 0 0 8007cacc 00000000 S aio/0
root 451 2 0 0 8007cacc 00000000 S nfsiod
root 455 2 0 0 8007cacc 00000000 S crypto/0
root 1073 2 0 0 8022bd8c 00000000 S kapmd
root 1148 2 0 0 802bb8d4 00000000 S file-storage
root 1199 2 0 0 8007cacc 00000000 S kstriped
root 1204 2 0 0 8007cacc 00000000 S kconservative/0
root 1209 2 0 0 8007cacc 00000000 S vpu_wq/0
root 1216 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1219 2 0 0 8007cacc 00000000 S esdhc_wq/0
root 1228 2 0 0 8007cacc 00000000 S usbhid_resumer
root 1231 2 0 0 8007cacc 00000000 S binder
root 1250 2 0 0 8032eefc 00000000 S mmcqd
root 1289 2 0 0 8007cacc 00000000 S l2cap
root 1290 2 0 0 804517f4 00000000 S krfcommd
root 1302 2 0 0 80315c1c 00000000 S mxc_ts
root 1303 1 300 156 800e9ea4 0000875c S /sbin/ueventd
root 1489 2 0 0 80247e28 00000000 S scsi_eh_0
root 1491 2 0 0 802aef98 00000000 S usb-storage
root 2147 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p2-
root 2148 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2149 2 0 0 800f9d94 00000000 S flush-179:0
root 2150 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p5-
root 2151 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2152 2 0 0 8015a0e4 00000000 S jbd2/mmcblk0p6-
root 2153 2 0 0 8007cacc 00000000 S ext4-dio-unwrit
root 2155 1 744 340 8006d5a0 6fd0c3ac S /system/bin/sh
system 2156 1 816 252 80343750 6fd0b6fc S /system/bin/servicemanager
root 2157 1 3872 564 ffffffff 6fd0bdac S /system/bin/vold
root 2158 1 3868 572 ffffffff 6fd0bdac S /system/bin/netd
root 2159 1 820 320 800e9ea4 6fd0b844 S /system/bin/dispd
root 2160 1 676 256 8037b6ac 6fd0c0cc S /system/bin/debuggerd
root 2161 1 83412 27140 800e9ea4 6fd0b844 S zygote
media 2162 1 24300 5232 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 2163 1 1264 564 800e9ea4 6fd0c59c S /system/bin/dbus-daemon
root 2164 1 824 336 803fd98c 6fd0b45c S /system/bin/installd
keystore 2165 1 1752 424 8037b6ac 6fd0c0cc S /system/bin/keystore
radio 2166 1 4444 672 ffffffff 6fd0bdac S /system/bin/rild
root 2230 2 0 0 80247e28 00000000 S scsi_eh_1
root 2231 2 0 0 802aef98 00000000 S usb-storage
system 2255 2161 130548 30352 ffffffff 6fd0b6fc S system_server
root 2381 2155 904 308 00000000 6fd0b45c R ps
Monday, April 16, 2012
Mmmmm... Pie..... Raspberry Pi to be exact
Back in January and early February there was a lot of interesting news on Raspberry Pi. Like every other technology enthusiast (read "geek") I have been watching the stories and been interested in that little piece of hardware.
"Why" you may ask? Considering that it has video output but no touch screen has lead most of the developer community to focus on why it can't (or shouldn't) support Android. However, it's perfect for creating a droid army to rival that of the Trade Federation <insert evil laugh here>.
Seriously though, I can't think of anything better than a low cost, easily accessible hardware platform to put a Headless Android on.
One problem... it's all sold out. Bother.
Stay tuned for some activity in the near future on porting the Android patches to the Raspberry Pi kernel, minus of course the video subsystem. Let's see what we get, shall we? Headless Raspberry Pi anyone, with Gingerbread crust? Mmmmmm, sounds good to me!
"Why" you may ask? Considering that it has video output but no touch screen has lead most of the developer community to focus on why it can't (or shouldn't) support Android. However, it's perfect for creating a droid army to rival that of the Trade Federation <insert evil laugh here>.
Seriously though, I can't think of anything better than a low cost, easily accessible hardware platform to put a Headless Android on.
One problem... it's all sold out. Bother.
Stay tuned for some activity in the near future on porting the Android patches to the Raspberry Pi kernel, minus of course the video subsystem. Let's see what we get, shall we? Headless Raspberry Pi anyone, with Gingerbread crust? Mmmmmm, sounds good to me!
Wednesday, April 4, 2012
From the Archives - 2008 Article on non-phone Android
I'm sure most of you have seen this article from Stephen Shankland of CENT in 2008 on using Android on non-phone devices. He was spot on about Android showing up in a lot more things than phones.
http://news.cnet.com/8301-17938_105-10047551-1.html
Now, four years later (ish) I find it interesting that many of the concerns that Stephen had about Android have come to the forefront. Issues around fragmentation and compatibility that he calls out in his article are a big deal for Android developers.
While some may think these issues are mostly UI related, even in non-UI based Android systems there will be some compatibility issues from version to version. It was true in 2008 and it's still true today.
http://news.cnet.com/8301-17938_105-10047551-1.html
Now, four years later (ish) I find it interesting that many of the concerns that Stephen had about Android have come to the forefront. Issues around fragmentation and compatibility that he calls out in his article are a big deal for Android developers.
While some may think these issues are mostly UI related, even in non-UI based Android systems there will be some compatibility issues from version to version. It was true in 2008 and it's still true today.
Monday, April 2, 2012
As Headless as an Android gets
Minor changes and now it's Headless. See the updated patch page.
Here is my ps of my currently running system:
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800d4fa4 0000875c S /init
root 2 0 0 0 8006d344 00000000 S kthreadd
root 3 2 0 0 8005cf24 00000000 S ksoftirqd/0
root 4 2 0 0 8008d2cc 00000000 S watchdog/0
root 5 2 0 0 80069bdc 00000000 S events/0
root 6 2 0 0 80069bdc 00000000 S khelper
root 9 2 0 0 80073e50 00000000 S async/mgr
root 10 2 0 0 80069bdc 00000000 S pm
root 13 2 0 0 80069bdc 00000000 S suspend
root 87 2 0 0 80041cf4 00000000 S usb_wakeup thre
root 227 2 0 0 800a5588 00000000 S sync_supers
root 229 2 0 0 800a5ff0 00000000 S bdi-default
root 231 2 0 0 80069bdc 00000000 S kblockd/0
root 241 2 0 0 80069bdc 00000000 S mxc_spi.0
root 249 2 0 0 80069bdc 00000000 S otg_switch/0
root 255 2 0 0 80268948 00000000 S khubd
root 277 2 0 0 80069bdc 00000000 S kmmcd
root 299 2 0 0 80069bdc 00000000 S rpciod/0
root 317 2 0 0 8008d514 00000000 S khungtaskd
root 318 2 0 0 8009fe28 00000000 S kswapd0
root 366 2 0 0 80069bdc 00000000 S aio/0
root 376 2 0 0 80069bdc 00000000 S nfsiod
root 380 2 0 0 80069bdc 00000000 S crypto/0
root 997 2 0 0 80210978 00000000 S kapmd
root 1068 2 0 0 802913c4 00000000 S file-storage
root 1116 2 0 0 80069bdc 00000000 S kstriped
root 1119 2 0 0 80069bdc 00000000 S kconservative/0
root 1126 2 0 0 80069bdc 00000000 S vpu_wq/0
root 1128 2 0 0 802e9fec 00000000 S hwevent
root 1133 2 0 0 80069bdc 00000000 S esdhc_wq/0
root 1136 2 0 0 80069bdc 00000000 S esdhc_wq/0
root 1143 2 0 0 80069bdc 00000000 S usbhid_resumer
root 1146 2 0 0 80069bdc 00000000 S binder
root 1156 2 0 0 802fe5c4 00000000 S mmcqd
root 1197 1 300 156 800d4fa4 0000875c S /sbin/ueventd
root 1958 2 0 0 80143604 00000000 S jbd2/mmcblk0p2-
root 1959 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1961 2 0 0 80143604 00000000 S jbd2/mmcblk0p5-
root 1962 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1963 2 0 0 80143604 00000000 S jbd2/mmcblk0p6-
root 1964 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1966 1 744 268 8005ac1c 6fd0c3ac S /system/bin/sh
system 1967 1 816 176 80313b44 6fd0b6fc S /system/bin/servicemanager
root 1968 1 3872 380 ffffffff 6fd0bdac S /system/bin/vold
root 1969 1 3868 452 ffffffff 6fd0bdac S /system/bin/netd
root 1970 1 820 204 800d4fa4 6fd0b844 S /system/bin/dispd
root 1971 1 676 148 8034ab44 6fd0c0cc S /system/bin/debuggerd
root 1972 1 83412 26312 800d4fa4 6fd0b844 S zygote
media 1973 1 24288 4492 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 1974 1 1264 184 800d4fa4 6fd0c59c S /system/bin/dbus-daemon
root 1975 1 824 208 803c9edc 6fd0b45c S /system/bin/installd
keystore 1976 1 1752 284 8034ab44 6fd0c0cc S /system/bin/keystore
radio 1977 1 4444 396 ffffffff 6fd0bdac S /system/bin/rild
system 2032 1972 127452 29024 ffffffff 6fd0b6fc S system_server
root 2170 1966 904 308 00000000 6fd0b45c R ps
Here is my ps of my currently running system:
# ps
USER PID PPID VSIZE RSS WCHAN PC NAME
root 1 0 324 188 800d4fa4 0000875c S /init
root 2 0 0 0 8006d344 00000000 S kthreadd
root 3 2 0 0 8005cf24 00000000 S ksoftirqd/0
root 4 2 0 0 8008d2cc 00000000 S watchdog/0
root 5 2 0 0 80069bdc 00000000 S events/0
root 6 2 0 0 80069bdc 00000000 S khelper
root 9 2 0 0 80073e50 00000000 S async/mgr
root 10 2 0 0 80069bdc 00000000 S pm
root 13 2 0 0 80069bdc 00000000 S suspend
root 87 2 0 0 80041cf4 00000000 S usb_wakeup thre
root 227 2 0 0 800a5588 00000000 S sync_supers
root 229 2 0 0 800a5ff0 00000000 S bdi-default
root 231 2 0 0 80069bdc 00000000 S kblockd/0
root 241 2 0 0 80069bdc 00000000 S mxc_spi.0
root 249 2 0 0 80069bdc 00000000 S otg_switch/0
root 255 2 0 0 80268948 00000000 S khubd
root 277 2 0 0 80069bdc 00000000 S kmmcd
root 299 2 0 0 80069bdc 00000000 S rpciod/0
root 317 2 0 0 8008d514 00000000 S khungtaskd
root 318 2 0 0 8009fe28 00000000 S kswapd0
root 366 2 0 0 80069bdc 00000000 S aio/0
root 376 2 0 0 80069bdc 00000000 S nfsiod
root 380 2 0 0 80069bdc 00000000 S crypto/0
root 997 2 0 0 80210978 00000000 S kapmd
root 1068 2 0 0 802913c4 00000000 S file-storage
root 1116 2 0 0 80069bdc 00000000 S kstriped
root 1119 2 0 0 80069bdc 00000000 S kconservative/0
root 1126 2 0 0 80069bdc 00000000 S vpu_wq/0
root 1128 2 0 0 802e9fec 00000000 S hwevent
root 1133 2 0 0 80069bdc 00000000 S esdhc_wq/0
root 1136 2 0 0 80069bdc 00000000 S esdhc_wq/0
root 1143 2 0 0 80069bdc 00000000 S usbhid_resumer
root 1146 2 0 0 80069bdc 00000000 S binder
root 1156 2 0 0 802fe5c4 00000000 S mmcqd
root 1197 1 300 156 800d4fa4 0000875c S /sbin/ueventd
root 1958 2 0 0 80143604 00000000 S jbd2/mmcblk0p2-
root 1959 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1961 2 0 0 80143604 00000000 S jbd2/mmcblk0p5-
root 1962 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1963 2 0 0 80143604 00000000 S jbd2/mmcblk0p6-
root 1964 2 0 0 80069bdc 00000000 S ext4-dio-unwrit
root 1966 1 744 268 8005ac1c 6fd0c3ac S /system/bin/sh
system 1967 1 816 176 80313b44 6fd0b6fc S /system/bin/servicemanager
root 1968 1 3872 380 ffffffff 6fd0bdac S /system/bin/vold
root 1969 1 3868 452 ffffffff 6fd0bdac S /system/bin/netd
root 1970 1 820 204 800d4fa4 6fd0b844 S /system/bin/dispd
root 1971 1 676 148 8034ab44 6fd0c0cc S /system/bin/debuggerd
root 1972 1 83412 26312 800d4fa4 6fd0b844 S zygote
media 1973 1 24288 4492 ffffffff 6fd0b6fc S /system/bin/mediaserver
bluetooth 1974 1 1264 184 800d4fa4 6fd0c59c S /system/bin/dbus-daemon
root 1975 1 824 208 803c9edc 6fd0b45c S /system/bin/installd
keystore 1976 1 1752 284 8034ab44 6fd0c0cc S /system/bin/keystore
radio 1977 1 4444 396 ffffffff 6fd0bdac S /system/bin/rild
system 2032 1972 127452 29024 ffffffff 6fd0b6fc S system_server
root 2170 1966 904 308 00000000 6fd0b45c R ps
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