mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-01 15:00:00 +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.
117 lines
2.4 KiB
Go
117 lines
2.4 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package cgroups
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
v1 "github.com/containerd/cgroups/stats/v1"
|
|
specs "github.com/opencontainers/runtime-spec/specs-go"
|
|
)
|
|
|
|
// Name is a typed name for a cgroup subsystem
|
|
type Name string
|
|
|
|
const (
|
|
Devices Name = "devices"
|
|
Hugetlb Name = "hugetlb"
|
|
Freezer Name = "freezer"
|
|
Pids Name = "pids"
|
|
NetCLS Name = "net_cls"
|
|
NetPrio Name = "net_prio"
|
|
PerfEvent Name = "perf_event"
|
|
Cpuset Name = "cpuset"
|
|
Cpu Name = "cpu"
|
|
Cpuacct Name = "cpuacct"
|
|
Memory Name = "memory"
|
|
Blkio Name = "blkio"
|
|
Rdma Name = "rdma"
|
|
)
|
|
|
|
// Subsystems returns a complete list of the default cgroups
|
|
// available on most linux systems
|
|
func Subsystems() []Name {
|
|
n := []Name{
|
|
Freezer,
|
|
Pids,
|
|
NetCLS,
|
|
NetPrio,
|
|
PerfEvent,
|
|
Cpuset,
|
|
Cpu,
|
|
Cpuacct,
|
|
Memory,
|
|
Blkio,
|
|
Rdma,
|
|
}
|
|
if !RunningInUserNS() {
|
|
n = append(n, Devices)
|
|
}
|
|
if _, err := os.Stat("/sys/kernel/mm/hugepages"); err == nil {
|
|
n = append(n, Hugetlb)
|
|
}
|
|
return n
|
|
}
|
|
|
|
type Subsystem interface {
|
|
Name() Name
|
|
}
|
|
|
|
type pather interface {
|
|
Subsystem
|
|
Path(path string) string
|
|
}
|
|
|
|
type creator interface {
|
|
Subsystem
|
|
Create(path string, resources *specs.LinuxResources) error
|
|
}
|
|
|
|
type deleter interface {
|
|
Subsystem
|
|
Delete(path string) error
|
|
}
|
|
|
|
type stater interface {
|
|
Subsystem
|
|
Stat(path string, stats *v1.Metrics) error
|
|
}
|
|
|
|
type updater interface {
|
|
Subsystem
|
|
Update(path string, resources *specs.LinuxResources) error
|
|
}
|
|
|
|
// SingleSubsystem returns a single cgroup subsystem within the base Hierarchy
|
|
func SingleSubsystem(baseHierarchy Hierarchy, subsystem Name) Hierarchy {
|
|
return func() ([]Subsystem, error) {
|
|
subsystems, err := baseHierarchy()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
for _, s := range subsystems {
|
|
if s.Name() == subsystem {
|
|
return []Subsystem{
|
|
s,
|
|
}, nil
|
|
}
|
|
}
|
|
return nil, fmt.Errorf("unable to find subsystem %s", subsystem)
|
|
}
|
|
}
|