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diff --git a/README.md b/README.md deleted file mode 100644 index 91af7cbf50be..000000000000 --- a/README.md +++ /dev/null @@ -1,56 +0,0 @@ -# linux-raspberrypi4-cacule-PKGBUILD - -## PKGBUILD for archlinuxarm with the cacule schedeuler. - -So far no perfomance/improvements tests done. Should work with desktop usage with a much better responsivty. -On x86_64 its one of the best schedeulers i have ever used. - -The patch can be applied for armv7 and armv8. You can use Cacule and Cacule-RDB. Cacule-RDB is still a expermintal thing. - -## Informations to Cacule-RDB - -This is an experimental load balancer for Cachy/CacULE. It is a lightweight -load balancer which is a replacement of CFS load balancer. It migrates -tasks based on their HRRN/Interactivity Scores (IS). Most of CFS load balancing-related -updates (cfs and se updates loads) are removed. The RDB balancer follows CFS -paradigm in which RDB balancing happen at the same points CFS does. RDB balancing happens -in three functions: newidle_balance, idle_balance, and active_balance. The newidle_balance -is called exactly at the same time as CFS did (when pick next task fails to find any task to run). -The RDB newidle_balance pulls one task that is the highest HRRN/IS from any CPU. The RDB idle_balance -is called in trigger_load_balance when CPU is idle, it does the same as newidle_balance but with -slight changes since newidle_balance is a special case. The RDB active_balance checks if the current -(NORMAL) runqueue has one task, if so, it pulls the highest of the highest HRRN/IS among all other CPUS. If the -runqueue has more than one task, then it pulls any highest HRRN/IS (same as idle does). A CPU cannot pull a task -from another CPU that has fewer tasks (when pull any). For the all three balancing -newidle_balance, idle_balance, and active_balance, the cpu first tries to pull from a CPU that shares the same -cache (cpus_share_cache). If can't pull any then it tries to pull from any CPU even though they are not in the same core. -Only when pulling the highest of the highest HRRN/IS (i.e. active_balance when CPU has one task), there is no check for -shared cache. - -Since trigger_load_balance is called for every tick, there is a guard time to prevent frequent tasks migration to reduce -runqueues locking and to reduce unnecessary tasks migrations. The time is 3ms after each active_balance. This time -guard is specifically for HZ=5 -0,1000. We don't want to run balancing every 2ms or 1ms to prevent regression in performance. -Here is how frequent the trigger_load_balance would run balancer with given HZ values: - -- HZ=100 runs every ~10ms -- HZ=250 runs every ~4ms -- HZ=300 runs every ~3ms -- HZ=500 runs every ~4ms -- HZ=1000 runs every ~3ms - - -### How to compile it - - git clone https://github.com/ptr1337/linux-raspberrypi4-cacule.git - cd linux-raspberrypi4-cacule - Then remove in the PKGBUILD if building for ***aarch64*** the 32-bit-converter.patch also the md5 - If you decide to use it without the RDB you need to remove in the config CONFIG_CACULE_RDB=y - then compile it with makepkg -si - - -reboot your device. - -## Cacule Schedeuler Informations - -https://github.com/hamadmarri/cacule-cpu-scheduler |