Tuesday, January 12, 2010
at 22:06 Friday, January 29, 2010
Wednesday, January 27, 2010
Saturday, January 30, 2010
Wednesday, January 27, 2010
Tuesday, January 26, 2010
Tuesday, January 26, 2010
Sunday, January 31, 2010
at 22:06 Friday, January 29, 2010
#!/bin/sh # #Author: Danilo Luvizotto <danilo.luvizotto@gmail.com> #License: do whatever you want with it. #This is mainly a memory MOD. The idea is to avoid swapping. #Swapping will cause the process to freeze while waiting #data to be available in RAM. In our case it will also waste #battery because the swap is compressed in N9. # #I've read a lot of documentation to get to the conclusions #and explanations detailed here, but I may be wrong. If you're #an expert and something is wrong, please let me know. #If you want to learn about about cgroups, this is the best #documentation I've found: #http://docs.redhat.com/docs/en-US/Re...ide/index.html #Beware some parts are specific to Red Hat Enterprise Linux. #Source: http://www.kernel.org/doc/Documentation/sysctl/vm.txt # #vfs_cache_pressure controls the tendency of the kernel to #reclaim the memory which is used for caching of directory #and inode objects. #At the default value of vfs_cache_pressure=100 the kernel #will attempt to reclaim dentries and inodes at a "fair" rate #with respect to pagecache and swapcache reclaim. Decreasing #vfs_cache_pressure causes the kernel to prefer to retain dentry #and inode caches. # #This is a mobile phone, we want applications to be available in #RAM, so we prefer pagecache and swapcache, not directory and #inode cache. We don't want applications to freeze while their #code come back from swap! echo 2097151 > /proc/sys/vm/vfs_cache_pressure #This will make the system less proactive moving data to swap. #The value '3' worked better in my tests. echo 3 > /proc/sys/vm/swappiness #This will limit memory used by background processes to 10MB. #The default value is arround 70MB. #In my phone only 3 processes are in this group: #msyncd, obexd and the infamous smartsearch while [[ `cat /syspart/system/background/memory.limit_in_bytes` != 10485760 ]] do echo 10M > /syspart/system/background/memory.limit_in_bytes sleep 5 done #This will make background processes to have less CPU priority. echo 128 > /syspart/system/background/cpu.shares #This will limit memory used by desktop processes to 100MB. #The default value is 200MB. #The most important process in this group is meegotouchhome, #to wich the 3 home views belong. #At fist I thought performance would be better if this group #has a higher limit, but it makes no difference. High limits #will cause processes to swap, so performance will decrease. while [[ `cat /syspart/system/desktop/memory.limit_in_bytes` != 104857600 ]] do echo 100M > /syspart/system/desktop/memory.limit_in_bytes sleep 5 done
