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Icestorm

Can you game core allocation on Apple silicon?

Some threads are set to run in the background, and get allocated to the E cores. Could you run them in a VM, and effectively promote them to run on P cores instead?

November 28, 2022 Macs, Technology

What performance to expect in the Mac Studio

Just how fast is a Mac Studio with an M1 Ultra? It all depends on the factors discussed here, with details of M1 series CPU performance.

March 10, 2022 Macs, Technology

Last Week on My Mac: Core allocation in M1 chips

Users and other processes have very limited control over which threads are run on which type of core. As Apple Silicon develops, this is an area set for change.

February 6, 2022 Macs, Technology

Scheduling of Threads on M1 Series Chips: second draft

From the anatomy of the CPU cores, to the queues of threads in GCD, and assignment to a core cluster, this details how threads are managed for the M1 series chips.

January 25, 2022 Macs, Technology

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

Scheduling of Processes on M1 Series Chips: first draft

T T Read More

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

Power, frequency, management: how M1 E cores win

T T Read More

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

M1 Icestorm cores can still perform very well

T T Read More

What are the penalties in real-world use for running your code on Icestorm cores, using around 10% of the power used by Firestorms?

September 1, 2021 Macs, Technology
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