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.
77 lines
1.8 KiB
Go
77 lines
1.8 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 RawAttachProgramOptions struct {
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// File descriptor to attach to. This differs for each attach type.
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Target int
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// Program to attach.
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Program *ebpf.Program
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// Program to replace (cgroups).
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Replace *ebpf.Program
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// Attach must match the attach type of Program (and Replace).
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Attach ebpf.AttachType
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// Flags control the attach behaviour. This differs for each attach type.
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Flags uint32
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}
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// RawAttachProgram is a low level wrapper around BPF_PROG_ATTACH.
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//
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// You should use one of the higher level abstractions available in this
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// package if possible.
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func RawAttachProgram(opts RawAttachProgramOptions) error {
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if err := haveProgAttach(); err != nil {
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return err
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}
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var replaceFd uint32
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if opts.Replace != nil {
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replaceFd = uint32(opts.Replace.FD())
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}
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attr := internal.BPFProgAttachAttr{
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TargetFd: uint32(opts.Target),
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AttachBpfFd: uint32(opts.Program.FD()),
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ReplaceBpfFd: replaceFd,
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AttachType: uint32(opts.Attach),
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AttachFlags: uint32(opts.Flags),
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}
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if err := internal.BPFProgAttach(&attr); err != nil {
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return fmt.Errorf("can't attach program: %s", err)
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}
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return nil
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}
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type RawDetachProgramOptions struct {
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Target int
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Program *ebpf.Program
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Attach ebpf.AttachType
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}
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// RawDetachProgram is a low level wrapper around BPF_PROG_DETACH.
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//
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// You should use one of the higher level abstractions available in this
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// package if possible.
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func RawDetachProgram(opts RawDetachProgramOptions) error {
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if err := haveProgAttach(); err != nil {
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return err
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}
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attr := internal.BPFProgDetachAttr{
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TargetFd: uint32(opts.Target),
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AttachBpfFd: uint32(opts.Program.FD()),
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AttachType: uint32(opts.Attach),
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}
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if err := internal.BPFProgDetach(&attr); err != nil {
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return fmt.Errorf("can't detach program: %s", err)
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}
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return nil
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}
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