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CPU Utilization is Wrong | Brendan Gregg
“The metric we all use for CPU utilization is deeply misleading, and getting worse every year.”
performance  hardware  brendangregg  cache  cpu 
15 hours ago by mr
What's a CPU to do when it has nothing to do? [LWN.net]
A 20% drop in idle power consumption may seem small as victories go, but it's not. Any system that wants to be able to cope reasonably well with peak loads will need spare capacity in normal operation, which will manifest as idle time. The graph above shows CPU usage on my mail/talk/file-transfer/VPN/NTP/etc. server over the past year; the bright yellow is idle time. Saving 20% of that power will please my co-location provider very much indeed, and it's good for the planet, too.
hardware  learning  cpu 
3 days ago by m_a
定位高cpu使用率 - strangerLove的专栏 - CSDN博客
1、  使用top查看占用cpu高的进程
2、  对cpu占用高的进程的所有线程进行排序,以17ce集中监控程序为例

root@ubuntu:~/admin/17ce#ps H -e -o pid,tid,pcpu,cmd --sort=pcpu |grep 17ce_cli_cen_1 >1.out
gdb  cpu 
5 days ago by jinwik
[H]ardOCP: Ryzen was Partially Disabled in Commissioned 9900k Benchmarks
This is unbelievable, I don't know if they are being extremely malicious or it's just incompetence of the highest order. How do you take note of every last setting to be documented but not realize just 4-core/8-threads are active on an 8-core/16-thread processor?
intel  corruption  hardware  cpu  performance  amd 
5 days ago by pankkake

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