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acc333c40b
When GTS is running in a container runtime which has configured CPU or memory limits or under an init system that uses cgroups to impose CPU and memory limits the values the Go runtime sees for GOMAXPROCS and GOMEMLIMIT are still based on the host resources, not the cgroup. At least for the throttling middlewares which use GOMAXPROCS to configure their queue size, this can result in GTS running with values too big compared to the resources that will actuall be available to it. This introduces 2 dependencies which can pick up resource contraints from the current cgroup and tune the Go runtime accordingly. This should result in the different queues being appropriately sized and in general more predictable performance. These dependencies are a no-op on non-Linux systems or if running in a cgroup that doesn't set a limit on CPU or memory. The automatic tuning of GOMEMLIMIT can be disabled by either explicitly setting GOMEMLIMIT yourself or by setting AUTOMEMLIMIT=off. The automatic tuning of GOMAXPROCS can similarly be counteracted by setting GOMAXPROCS yourself.
16 lines
837 B
Go
16 lines
837 B
Go
// Package ebpf is a toolkit for working with eBPF programs.
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//
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// eBPF programs are small snippets of code which are executed directly
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// in a VM in the Linux kernel, which makes them very fast and flexible.
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// Many Linux subsystems now accept eBPF programs. This makes it possible
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// to implement highly application specific logic inside the kernel,
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// without having to modify the actual kernel itself.
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//
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// This package is designed for long-running processes which
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// want to use eBPF to implement part of their application logic. It has no
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// run-time dependencies outside of the library and the Linux kernel itself.
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// eBPF code should be compiled ahead of time using clang, and shipped with
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// your application as any other resource.
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//
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// Use the link subpackage to attach a loaded program to a hook in the kernel.
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package ebpf
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