![]() ![]() Make sure Windows => Keep CPU Windows on Top is disabled (unchecked). The example below shows a mostly idle system. Green represents CPU utilization by user applications, red represents CPU utilization by Mac OS X itself, and blue indicates low-priority tasks. The history graph ( Window => CPU History) can be sized wider to show CPU history over quite some time ( View => Update Frequency). Unfortunately, they can be shown only one tab at a time (you can’t watch Disk Activity and Network at the same time). Observe the tabs at bottom ( CPU / System Memory / Disk Activity / etc). You might find that some “vampire” programs waste CPU time when doing nothing useful- these are programs you don’t want to leave running when you’re not using them! Disk and network activity One CPU core represents 100%, 2 CPU cores is 200%, etc. Download CPU Check - Monitor CPU Usage for macOS 11.0 or later and enjoy it on your Mac. The remainder is being used by WindowServer, DreamWeaver, etc. So, the docker embedded host isnt causing the CPU usage spike. The example below shows a MemoryTester (dlt) test in progress, taking 364.7% of the available CPU cycles. docker run -it -rm -pid host busybox top The CPU usage on docker embedded host is 3. This makes it easy to see which applications are using CPU resources. Sort by percentage CPU usage by clicking on the CPU column (triangle should point down as shown). Quad-core CPU history in Activity Monitor (mostly idle) ![]()
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