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Omar Rizwan . @omar,

"Please remember that the kernel is for running userspace" https://lwn.net/Articles/803421/

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screenshot of first 2 sections of linked LWN article "We've been through a lot of tracing tools and frameworks both for generating/annotating traceable data and for collecting/processing it. uprobes, ftrace, dtrace-for-linux, SystemTap, linux-perf and perf_events, LTTng, and more. They're inter-related and not a simple generational series of changes. But one pattern seems to have persisted pretty strongly: nothing works very well with "real world" production userspace deployments initially, yet earlier generations of tools tend to be abandoned. If you go to use one tool you're told it's obsolete, you should use the new one instead, but that one doesn't actually work on any of the systems widely deployed in production and won't for a long time yet. When it does, it probably doesn't support external debuginfo (like every system has had for 10+ years) for another year or two after that, because really, who debugs packaged binaries on production systems?"

screenshot of first 2 sections of linked LWN article "We've been through a lot of tracing tools and frameworks both for generating/annotating traceable data and for collecting/processing it. uprobes, ftrace, dtrace-for-linux, SystemTap, linux-perf and perf_events, LTTng, and more. They're inter-related and not a simple generational series of changes. But one pattern seems to have persisted pretty strongly: nothing works very well with "real world" production userspace deployments initially, yet earlier generations of tools tend to be abandoned. If you go to use one tool you're told it's obsolete, you should use the new one instead, but that one doesn't actually work on any of the systems widely deployed in production and won't for a long time yet. When it does, it probably doesn't support external debuginfo (like every system has had for 10+ years) for another year or two after that, because really, who debugs packaged binaries on production systems?"

Apr 25, 2024, 09:41

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