原创 eas k5.4 (五)：v4.20 - Runtime scheduler domain flag detection
AOSP Kernel4.14已經有這個feature，kernel4.20參考AOSP kernel也支持這個feature： e1799a8 sched/topology, arch/arm: Rebuild sched_domain
2020-06-16 09:18:00
8
原创 eas k5.4 (三)：v5.3 - Tracepoints (PELT and over-utilzation)
https://lore.kernel.org/lkml/[email protected]/ a056a5b sched/debug: Export the newly added tra
2020-06-16 09:18:00
1
原创 eas k5.4 (六)：v4.20 - Misfit task
757ffdd sched/fair: Set rq->rd->overload when misfit e90c8fe sched/fair: Wrap rq->rd->overload accesses with READ/WRITE
2020-06-16 09:18:00
5
原创 shell 腳本實例(一) - 校正systrace時間戳
#!/bin/bash #$1 is systrace file; #set -x grep -A 80 "entries-in-buffer/entries-written" "$1" echo -n "\033[31m 從上邊tr
2020-06-16 09:18:00
2
原创 eas k5.4 (四)：v5.0 - Per-cpu Energy Model and Energy Aware Scheduling
Linux 5.0 new feature:https://kernelnewbies.org/Linux_5.0#Energy-aware_Scheduling_for_Arm_big.LITTLE 732cd75 sched/fa
2020-06-16 09:18:00
1
原创 eas k5.4 (二)：v5.4 - Util(ization) clamping
目錄 簡介 一. 數據結構 1. rq中uclamp的實現 2. task中uclamp的實現 3. 擴展 CPU's cgroup controller 二. 關鍵函數 1. uclamp的初始化 2. fork task的ucla
2020-06-16 09:17:59
123
原创 eas k5.4 (八)：v4.17 - Idle CPU Per-Entity Load-Tracking (PELT) update
https://lkml.org/lkml/2019/1/16/156 10a35e6 sched/pelt: Skip updating util_est when utilization is higher than CPU's ca
2020-06-16 09:17:59
原创 shell腳本實例(二) - ltp測試
測試sched_latency_dl 100次 for i in `seq 0 99`;do ./sched_latency_dl > run.log 2>& 1;echo "----->$i";if [ `grep "DL task
2020-06-16 09:17:59
原创 eas k5.4 (九)：v4.15 - Frequency Invariant Engine (FIE)
https://lkml.org/lkml/2017/7/6/268 431ead0 arm64: wire cpu-invariant accounting support up to the task scheduler 4e63eb
2020-06-16 09:17:59
原创 CPU-PnP工具(一): cpu_loading
（一）簡介： 測試前取/sys/devices/system/cpu/cpufreq/policy4/stats/time_in_state（個cpu頻點及運行時間: Documentation/cpu-freq/cpufreq-stat
2020-06-16 09:17:59
原创 eas k5.4 (一)：v5.4 - Patch-set sched:fair: Reduce complexity of energy calculation
eb92692 sched/fair: Speed-up energy-aware wake-ups find_energy_efficient_cpu() pack small task到一個cpu使其它cpu更容易進入deeper i
2020-06-16 09:17:59
原创 eas k5.4 (一)：v5.4 - Patch-set 'sched/fair: Reduce complexity of energy calculation'
eb92692 sched/fair: Speed-up energy-aware wake-ups
2020-04-14 04:59:48
原创 eas k5.4 (七)：v4.17 - Util(ization) Est(imated)
519329 sched/fair: Update util_est only on util_avg updates a07630b sched/cpufreq/schedutil: Use util_est for OPP selec
2020-04-14 04:59:48
6
原创 shell腳本實例
grep & awk 打印匹配行的第二列 0.304443153 281764586 cycles 0.304443153 76724668 instructions 0.304443153 12055101 branch-instr
2019-09-04 15:22:49