all: Use Linux container CPU quota (fixes #9357, fixes #9435) (#9436)

Go is not cgroup aware and by default will set GOMAXPROCS to the number
of available threads, regardless of whether it is within the allocated
quota. This behaviour causes high amount of CPU throttling and degraded
application performance.

cmd/stcompdirs/main.go

@@ -16,6 +16,7 @@ import (
 	"path/filepath"
 
 	"github.com/syncthing/syncthing/lib/sha256"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/stcrashreceiver/main.go

@@ -23,11 +23,11 @@ import (
 	"path/filepath"
 
 	"github.com/alecthomas/kong"
+	raven "github.com/getsentry/raven-go"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/syncthing/syncthing/lib/sha256"
 	"github.com/syncthing/syncthing/lib/ur"
-
-	raven "github.com/getsentry/raven-go"
+	_ "go.uber.org/automaxprocs"
 )
 
 const maxRequestSize = 1 << 20 // 1 MiB

cmd/stdisco/main.go

@@ -18,6 +18,7 @@ import (
 	"github.com/syncthing/syncthing/lib/beacon"
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/protocol"
+	_ "go.uber.org/automaxprocs"
 )
 
 var (

cmd/stdiscosrv/main.go

@@ -24,6 +24,7 @@ import (
 	"github.com/syncthing/syncthing/lib/tlsutil"
 	"github.com/syndtr/goleveldb/leveldb/opt"
 	"github.com/thejerf/suture/v4"
+	_ "go.uber.org/automaxprocs"
 )
 
 const (

cmd/stevents/main.go

@@ -14,6 +14,8 @@ import (
 	"net/http"
 	"os"
 	"time"
+
+	_ "go.uber.org/automaxprocs"
 )
 
 type event struct {

cmd/stfileinfo/main.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/scanner"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/stfinddevice/main.go

@@ -20,6 +20,7 @@ import (
 	"github.com/syncthing/syncthing/lib/discover"
 	"github.com/syncthing/syncthing/lib/events"
 	"github.com/syncthing/syncthing/lib/protocol"
+	_ "go.uber.org/automaxprocs"
 )
 
 var timeout = 5 * time.Second

cmd/stfindignored/main.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/syncthing/syncthing/lib/fs"
 	"github.com/syncthing/syncthing/lib/ignore"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/stgenfiles/main.go

@@ -15,6 +15,8 @@ import (
 	"os"
 	"path/filepath"
 	"time"
+
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/strelaypoolsrv/main.go

@@ -21,18 +21,18 @@ import (
 	"time"
 
 	lru "github.com/hashicorp/golang-lru/v2"
-	"github.com/syncthing/syncthing/lib/httpcache"
-	"github.com/syncthing/syncthing/lib/protocol"
-
 	"github.com/oschwald/geoip2-golang"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/syncthing/syncthing/cmd/strelaypoolsrv/auto"
 	"github.com/syncthing/syncthing/lib/assets"
+	"github.com/syncthing/syncthing/lib/httpcache"
+	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/sync"
 	"github.com/syncthing/syncthing/lib/tlsutil"
+	_ "go.uber.org/automaxprocs"
 )
 
 type location struct {

cmd/strelaysrv/main.go

@@ -20,18 +20,17 @@ import (
 	"time"
 
 	"github.com/syncthing/syncthing/lib/build"
+	"github.com/syncthing/syncthing/lib/config"
 	"github.com/syncthing/syncthing/lib/events"
+	"github.com/syncthing/syncthing/lib/nat"
 	"github.com/syncthing/syncthing/lib/osutil"
+	_ "github.com/syncthing/syncthing/lib/pmp"
+	syncthingprotocol "github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/relay/protocol"
 	"github.com/syncthing/syncthing/lib/tlsutil"
-	"golang.org/x/time/rate"
-
-	"github.com/syncthing/syncthing/lib/config"
-	"github.com/syncthing/syncthing/lib/nat"
-	_ "github.com/syncthing/syncthing/lib/pmp"
 	_ "github.com/syncthing/syncthing/lib/upnp"
-
-	syncthingprotocol "github.com/syncthing/syncthing/lib/protocol"
+	_ "go.uber.org/automaxprocs"
+	"golang.org/x/time/rate"
 )
 
 var (

cmd/strelaysrv/testutil/main.go

@@ -17,6 +17,7 @@ import (
 	syncthingprotocol "github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/relay/client"
 	"github.com/syncthing/syncthing/lib/relay/protocol"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/stsigtool/main.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/syncthing/syncthing/lib/signature"
 	"github.com/syncthing/syncthing/lib/upgrade"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/stupgrades/main.go

@@ -21,6 +21,7 @@ import (
 	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/upgrade"
+	_ "go.uber.org/automaxprocs"
 )
 
 type cli struct {

cmd/stvanity/main.go

@@ -27,6 +27,7 @@ import (
 	"time"
 
 	"github.com/syncthing/syncthing/lib/protocol"
+	_ "go.uber.org/automaxprocs"
 )
 
 type result struct {

cmd/stwatchfile/main.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/syncthing/syncthing/lib/sha256"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {

cmd/syncthing/main.go

@@ -32,6 +32,7 @@ import (
 	"github.com/alecthomas/kong"
 	"github.com/thejerf/suture/v4"
 	"github.com/willabides/kongplete"
+	_ "go.uber.org/automaxprocs"
 
 	"github.com/syncthing/syncthing/cmd/syncthing/cli"
 	"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"

cmd/ursrv/main.go

@@ -13,6 +13,7 @@ import (
 	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/cmd/ursrv/aggregate"
 	"github.com/syncthing/syncthing/cmd/ursrv/serve"
+	_ "go.uber.org/automaxprocs"
 )
 
 type CLI struct {