Timeline for Why does my cpu never get past 60-70% cpu usage? Where is the bottleneck?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| May 21, 2021 at 5:37 | comment | added | Sheece Gardazi | @hobbs can you elaborate further? I am having similar issue my system has NUMA nodes I ran fake processes in parallel and it never goes above 50% | |
| Apr 29, 2018 at 6:35 | answer | added | TheGeek | timeline score: 1 | |
| May 2, 2016 at 1:15 | comment | added | hobbs | @Jakuje you know that that only affects NUMA systems, right? | |
| May 1, 2016 at 21:35 | vote | accept | Harald H | ||
| May 1, 2016 at 20:42 | answer | added | Jakuje | timeline score: 4 | |
| May 1, 2016 at 20:33 | comment | added | Jakuje | Glad you managed to find a problem. I will compose answer. From the comments. | |
| May 1, 2016 at 20:30 | comment | added | Harald H | What is the right way to resolve this question on Stackoverflow now? This is my first time posting a question. | |
| May 1, 2016 at 20:29 | comment | added | Harald H | @Jakuje Although perhaps not in the way you thought, your answer did help me. I tried to get perf stat running but was getting error messages about the wrong kernel. So I eventually discovered I was running 4.2.0 although ubuntu 16.04 is meant to be running 4.4. So I eventually got it running 4.4.0, and now the issue is gone. | |
| May 1, 2016 at 19:46 | comment | added | Jakuje |
1) Linux scheduler is buggy. 2) 6 core Intel running 12 threads will saturate HT pipelines quite simply as well as the memory lanes. Depends on what is running. 3) Running the task under perf stat might give you some idea about the processor, its stalled cycles, or memory behaviour.
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| May 1, 2016 at 19:40 | comment | added | Harald H | @Jakue What are you suggesting by posting that? I did mention in my post that this issue has not always been there, so it's a concrete issue I'm trying to debug. | |
| May 1, 2016 at 19:32 | comment | added | Jakuje | The Linux Scheduler: a Decade of Wasted Cores -- good read even though it might not be related to your problem | |
| May 1, 2016 at 19:13 | review | First posts | |||
| May 1, 2016 at 19:21 | |||||
| May 1, 2016 at 19:12 | history | asked | Harald H | CC BY-SA 3.0 |