Further investigation then hinted that the according Gigabit Ethernet port on my HP 1810 switch was apparently malfunctioning (or even dead): In the macOS Network Preferences, the Thunderbolt-Ethernet connection was constantly shown as red/disconnected, although the OS was apparently trying to establish a connection again and again (and failed). Typically, for a CPU load of around 50%, more than 5000 Mach ports were used.īy coincidence, I then noticed that, unlike expected, my MBP wasn’t actually using Ethernet, but only WiFi. This was weird, pointing to some kind of leakage. Taking a closer look at the process in the Activity Monitor, I then noticed that the number of (used) ports (so-called “ Mach ports“) by the process were steadily growing, once SystemUIServer was started. Its CPU usage then reset to a low one-digit number. every 30 minutes -> there are also scripts to automatically restart SystemUIServer). using the Activity Monitor) from time to time (i.e. The only apparent remedy was to kill the SystemUIServer process (e.g. It usually started using one-digit percentages of the available CPU power, then growing to 10%, 15%, 20%, up to well above 60%, sometimes even 80% and more! It wasn’t a steady growth – it sometimes shrank again, just to grow even further. Recently, the SystemUIServer process on my MBP running macOS Sierra has started “eating” a lot of CPU, slowing down the whole machine, even making the clock in the top menu bar stop working properly.
0 kommentar(er)
