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performance

How you can’t promote threads on an M1

Why can’t the taskpolicy command tool be used to promote software to be able to run on the M1 chip’s Performance cores? Does it change QoS?

January 24, 2022 Macs, Technology

Memory Lane: Grokking memory problems in Activity Monitor

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Activity Monitor’s Memory view is the perfect place to watch for memory problems, such as a leak. Demonstrated here in macOS 12.0.1 and 12.1.

January 19, 2022 Macs, Technology

Scheduling of Processes on M1 Series Chips: first draft

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An accessible summary of the CPU cores in M1 chips, and how they appear to be managed by macOS to get the best for different classes of process.

January 13, 2022 Macs, Technology

How macOS manages many processes on M1 cores

Results from running 10-70 identical compute-intensive processes on M1 chips shows the differences in strategy between background and high priority settings.

January 12, 2022 Macs, Technology

Last Week on My Mac: Has Time Machine slowed?

Since Catalina, reports of Time Machine backups slowing to a crawl have become common, but the reasons are unclear. It’s time for Apple to inform us.

January 9, 2022 Macs, Technology

How macOS controls performance: QoS on Intel and M1 processors

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Running processes at different Quality of Service affects their performance differently on Intel and M1 Macs. This explains what happens.

January 7, 2022 Macs, Technology

Power, frequency, management: how M1 E cores win

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macOS manages the loading and frequency of M1 cores according to the QoS set, and rules which differ between the original M1 and the M1 Pro.

January 3, 2022 Macs, Technology

Last Week on My Mac: On M1 chips 1 + 1 = 4

How the two Efficiency cores in the M1 Pro and Max chips can match the performance of all four E cores in the original M1.

January 2, 2022 Macs, Technology

Anomalies in base performance of M1 cores

How can the two E cores in an M1 Pro/Max apparently match the performance of the four in the original M1? Answers, please.

December 22, 2021 Macs, Technology

Do M1 Pro and Max CPUs run slower on battery?

Does your M1 Mac run more slowly when it’s on battery power, or with Low Power mode enabled? An exploration of effects on its CPU cores provides an unexpected answer.

December 8, 2021 Macs, Technology

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