Add the first USDT probe to Lix #727

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opened 2025-03-12 04:11:06 +00:00 by jade · 1 comment

jade commented

2025-03-12 04:11:06 +00:00

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This isn't hard, we just need someone to put the first USDT probe in, and we would be off to the races. Maybe do it to gc events in the interpreter, maybe something else. Doesn't matter too much, the infra is just important to put together.

Possibly helpful link: https://manpages.debian.org/testing/systemtap-sdt-dev/dtrace.1.en.html

Possibly useful (but I'm so sorry it's autoconf): 645cd6a5ad/build/php.m4 (L2271) 645cd6a5ad/configure.ac (L995) 645cd6a5ad/Zend/zend_dtrace.d

There's a bunch of nice observability infrastructure like eBPF, dtrace, etc, which we could use on Lix if we integrate some explicit probes. We could maybe push NixOS on frame pointers a bit (or at least enable them ourselves): https://discourse.nixos.org/t/nixos-frame-pointer-enable/39554. This isn't hard, we just need someone to put the first USDT probe in, and we would be off to the races. Maybe do it to gc events in the interpreter, maybe something else. Doesn't matter too much, the infra is just important to put together. Possibly helpful link: https://manpages.debian.org/testing/systemtap-sdt-dev/dtrace.1.en.html Possibly useful (but I'm so sorry it's autoconf): https://github.com/php/php-src/blob/645cd6a5adfa82ed0ab8c2458dd3fcac3465d542/build/php.m4#L2271 https://github.com/php/php-src/blob/645cd6a5adfa82ed0ab8c2458dd3fcac3465d542/configure.ac#L995 https://github.com/php/php-src/blob/645cd6a5adfa82ed0ab8c2458dd3fcac3465d542/Zend/zend_dtrace.d

jade added the

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2025-03-12 04:11:06 +00:00

lix-bot commented

2025-03-24 01:02:50 +00:00

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This issue was mentioned on Gerrit on the following CLs:

commit message in cl/2884 ("observability: add the first USDT probe")

This issue was mentioned on Gerrit on the following CLs: * commit message in [cl/2884](https://gerrit.lix.systems/c/lix/+/2884) ("observability: add the first USDT probe")