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throw234232t3
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This account is a replica from Hacker News. Its author can't see your replies. If you find this service useful, please consider supporting us via our Patreon.
So far I have provided you with examples of how Instruments.app loses to perf. Perf does not have these limitations. You have not provided any examples in the reverse direction.
https://blog.bugsiki.dev/posts/apple-pmu/
> I quickly found out that Apple Instruments doesn’t support fetching more than 10 counters, sometimes 8, and sometimes less. I was constantly getting errors like '<SOME_COUNTER>' conflicts with a previously added event. The maximum that I could get is 10 counters. So, the first takeaway was that there is a limit to how many counters I can fetch, and another is that counters are, in some way, incompatible with each other. Why and how they’re incompatible is a good question.
Also: https://hmijailblog.blogspot.com/2015/09/using-intels-perfor...
PMU Counters on Apple Silicon
Last time I wrote about profiling in Zig on Apple Silicon, I touched on PMU counter profiling. This time I decided to go further and create my own tool to fetch all available counters for Apple Silicon processors (M1, M2, and later). Brief explanation of PMU counters PMU (Performance Monitoring Unit) counters are hardware counters that track microarchitectural events inside the CPU, e.g. executed instructions, retired operations, branches, cache misses, and more.
On pre-Tahoe macOS there is the “Applications” view (accessible e.g. from the dock). Since the only thing I would use Spotlight for is searching through applications to start, I changed the Cmd+Space keybind to launch the Applications view. The search is instant.
Spotlight, aside from failing to find applications also pollutes the search results with random files it found on the filesystem, some shortcuts to search the web and whatnot. Also, at the start of me using a Mac it repeatedly got into the state of not displaying any results whatsoever. Fixing that each time required running some arcane commands in the terminal. Something that people associate with Linux, but ironically I think now Linux requires less of that than Mac.
But in Tahoe they removed the Applications view, so my solution is gone now.
All in all, with Apple destroying macOS in each release, crippling DTrace with SIP, Liquid Glass, poor performance monitoring compared to what I can see with tools like perf on Linux, or Intel VTune on Windows, Metal slowly becoming the only GPU programming option, I think I’m going to be switching back to Linux.