[HOWTO] install compcache configuration/status tool: rzscontrol

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androcheck

Senior Member
Dec 7, 2009
235
413
john.zweng.at
Hi!

For those of you who have compcache on their ROMs enabled: Maybe you noticed that in previous versions of compcache there used to be a special file in /proc from which you could read stats about compcache and its usage (by simply doing "cat /proc/ramzswap").

In newer version this has been removed in favour to a userspace tool for the commandline named "rzscontrol". Some ROMs may have already included it. I missed it on my ROM so I grabbed the current sources from http://code.google.com/p/compcache/ and compiled it against Android 2.1 tree.

If you want to install it:
Attached you find 2 zip-files for 2 alternate ways of installing it:


METHOD 1: Install manually with ADB:

The file "compcache-rzscontrol_just-binary.zip" just contains the compiled binary. Unzip the file and perform the followinf steps to install it manually:
Code:
adb remount
adb push rzscontrol /system/xbin/
adb shell chmod 0755 /system/xbin/rzscontrol
That's all.


METHOD 2: Install as update.zip via recovery:

Download the other zip-file "update-install-compcache-rzscontrol-signed.zip". Place it in root of your sd-card, reboot into recovery and apply it as update.zip.

The result is the same for both ways.


TEST IT:
After you installed it, you can test it (of course you need to have compcache enabled):

Code:
adb shell rzscontrol /dev/block/ramzswap0 --stats
This should produce output similiar to this:
Code:
DiskSize:	   65536 kB
NumReads:	     214
NumWrites:	     919
FailedReads:	       0
FailedWrites:	       0
InvalidIO:	       0
NotifyFree:	       0
ZeroPages:	      37
GoodCompress:	      62 %
NoCompress:	       5 %
PagesStored:	     882
PagesUsed:	     385
OrigDataSize:	    3528 kB
ComprDataSize:	    1329 kB
MemUsedTotal:	    1540 kB

Of course you can do much more with this tool. It enables you to configure your compcache blockdevice and other things. For full manpage look here: Manpage of rzscontrol on compcache.googlecode.com


Have fun! :)
 

Attachments

  • compcache-rzscontrol_just-binary.zip
    6.5 KB · Views: 564
  • update-install-compcache-rzscontrol-signed.zip
    8.6 KB · Views: 594

androcheck

Senior Member
Dec 7, 2009
235
413
john.zweng.at
Hi again! :)

For those of you who have "GScript" or "GScript Lite" installed (free app from the Market which allows you to start shell-scripts simply on your phone):

I made a script for gscript, which allows you to start rzscontrol and print out the compcache stats with one touch.

Instructions:
  • Unzip the file.
  • Place it on your scard into the folder "gscript".
  • Run GScript Lite and select "Add script" from the menu.

Enjoy! :)
 

Attachments

  • compcache_status.zip
    278 bytes · Views: 217

kendong2

Inactive Recognized Developer
Sep 29, 2009
1,673
74
hehe this is already implemented in VR6.1... my own work though, i did the same what you did two days ago. also included will be a script to turn on and off compcache on the fly :)
 
G

Geochelone

Guest
I ran your code with GScript, and I have this error:

Failed to open /dev/block/ramzswap0: No such file or directory

Edit: I guess I don't have compcache in my ROM then.
 
Last edited:

dipje

Senior Member
Oct 27, 2006
776
160
My question is , why does (my own compiled, ahem) rzscontrol crash / coredump / segfaul when I try to give the initial size on the command line. According to the help-output my version only supports --init, and if I give any other one, it crashes. This way I don't really have control over my ramzswap on Androbin. With 'free' I can see swap active and it's being full (so it helps I think :)) but more is impossible.

While I'm typing this: I compiled compcache and rzscontrol from the version in Cyanogen's github, maybe I should try the official site version :)
 
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