mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-05-20 09:18:13 +00:00
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.
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package link
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import (
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"fmt"
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"github.com/cilium/ebpf"
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"github.com/cilium/ebpf/internal"
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)
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type RawTracepointOptions struct {
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// Tracepoint name.
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Name string
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// Program must be of type RawTracepoint*
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Program *ebpf.Program
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}
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// AttachRawTracepoint links a BPF program to a raw_tracepoint.
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//
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// Requires at least Linux 4.17.
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func AttachRawTracepoint(opts RawTracepointOptions) (Link, error) {
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if t := opts.Program.Type(); t != ebpf.RawTracepoint && t != ebpf.RawTracepointWritable {
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return nil, fmt.Errorf("invalid program type %s, expected RawTracepoint(Writable)", t)
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}
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if opts.Program.FD() < 0 {
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return nil, fmt.Errorf("invalid program: %w", internal.ErrClosedFd)
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}
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fd, err := bpfRawTracepointOpen(&bpfRawTracepointOpenAttr{
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name: internal.NewStringPointer(opts.Name),
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fd: uint32(opts.Program.FD()),
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})
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if err != nil {
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return nil, err
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}
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return &progAttachRawTracepoint{fd: fd}, nil
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}
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type progAttachRawTracepoint struct {
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fd *internal.FD
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}
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var _ Link = (*progAttachRawTracepoint)(nil)
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func (rt *progAttachRawTracepoint) isLink() {}
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func (rt *progAttachRawTracepoint) Close() error {
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return rt.fd.Close()
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}
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func (rt *progAttachRawTracepoint) Update(_ *ebpf.Program) error {
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return fmt.Errorf("can't update raw_tracepoint: %w", ErrNotSupported)
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}
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func (rt *progAttachRawTracepoint) Pin(_ string) error {
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return fmt.Errorf("can't pin raw_tracepoint: %w", ErrNotSupported)
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}
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