Performance - tuning BIMC turbo mode and cpu

最新推荐文章于 2025-07-08 10:15:46 发布

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#Performance #bus

performance 同时被 3 个专栏收录

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usb speed

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本文介绍了一种通过调整CPU频率、内存频率及总线投票值等参数来最大化BIMC性能的方法，并展示了USB速度测试结果。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

bumping up BIMC(NoCs) to Turbo and with scaling governor set to performance mode
put IB/AB values for bus voting to get max theoretical requirement
scaling governor set to performance mode
Set DDR to max freq
Get DDR current freq

stop thermal-engine
echo 1 > /sys/devices/system/cpu/cpu1/online ;\
echo 1 > /sys/devices/system/cpu/cpu2/online ;\
echo 1 > /sys/devices/system/cpu/cpu3/online ;\
echo 1 > /sys/devices/system/cpu/cpu4/online ;\
echo 1 > /sys/devices/system/cpu/cpu5/online ;\
echo 1 > /sys/devices/system/cpu/cpu6/online ;\
echo 1 > /sys/devices/system/cpu/cpu7/online ;\
echo performance >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor ;\
echo performance > /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor ;\
echo 1 > /sys/kernel/debug/msm-bus-dbg/shell-client/mas ;\
echo 512 > /sys/kernel/debug/msm-bus-dbg/shell-client/slv ;\
echo 1000000000  > /sys/kernel/debug/msm-bus-dbg/shell-client/ib ;\
echo 1 > /sys/kernel/debug/msm-bus-dbg/shell-client/update_request

cat /sys/kernel/debug/clk/bimc_clk/clk_measure

After these settings, do the usb speed test

2018-05-11 10:59:01,530 INFO Loopback:  total write : 95.8073868141 MBps
2018-05-11 10:59:01,530 INFO Loopback:  total  read : 95.8073868141 MBps
2018-05-11 10:59:32,358 INFO Loopback:  total write : 97.9647575235 MBps
2018-05-11 10:59:32,358 INFO Loopback:  total  read : 97.9647575235 MBps
2018-05-11 11:00:03,184 INFO Loopback:  total write : 95.4331970533 MBps
2018-05-11 11:00:03,186 INFO Loopback:  total  read : 95.4331970533 MBps
2018-05-11 11:00:34,019 INFO Loopback:  total write : 88.9473514704 MBps
2018-05-11 11:00:34,019 INFO Loopback:  total  read : 88.9473514704 MBps
2018-05-11 11:01:05,053 INFO Loopback:  total write : 83.0419871686 MBps
2018-05-11 11:01:05,055 INFO Loopback:  total  read : 83.0419871686 MBps
2018-05-11 11:01:05,655 INFO Loopback: (524288, 191.64807477055675)
2018-05-11 11:01:05,655 INFO Loopback: (262144, 195.96282506311428)
2018-05-11 11:01:05,655 INFO Loopback: (131072, 190.8663941066034)
2018-05-11 11:01:05,657 INFO Loopback: (65536, 177.9280040832467)
2018-05-11 11:01:05,657 INFO Loopback: (32768, 166.1172710440973)