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.

21 files changed, 34 insertions, 12 deletions

diff --git a/build.go b/build.go
index 6f76e4735..18957bfc7 100644
--- a/build.go
+++ b/build.go
@@ -34,6 +34,7 @@ import (
 	"time"
 
 	buildpkg "github.com/syncthing/syncthing/lib/build"
+	_ "go.uber.org/automaxprocs"
 )
 
 var (
diff --git a/cmd/stcompdirs/main.go b/cmd/stcompdirs/main.go
index 62565be5e..3a3f0174e 100644
--- a/cmd/stcompdirs/main.go
+++ b/cmd/stcompdirs/main.go
@@ -16,6 +16,7 @@ import (
 	"path/filepath"
 
 	"github.com/syncthing/syncthing/lib/sha256"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {
diff --git a/cmd/stcrashreceiver/main.go b/cmd/stcrashreceiver/main.go
index 197466a9a..788b14657 100644
--- a/cmd/stcrashreceiver/main.go
+++ b/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
diff --git a/cmd/stdisco/main.go b/cmd/stdisco/main.go
index 7b820fcc4..d0e52d031 100644
--- a/cmd/stdisco/main.go
+++ b/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 (
diff --git a/cmd/stdiscosrv/main.go b/cmd/stdiscosrv/main.go
index f7f968c86..fa1ce3b72 100644
--- a/cmd/stdiscosrv/main.go
+++ b/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 (
diff --git a/cmd/stevents/main.go b/cmd/stevents/main.go
index b723ab542..92224a7d6 100644
--- a/cmd/stevents/main.go
+++ b/cmd/stevents/main.go
@@ -14,6 +14,8 @@ import (
 	"net/http"
 	"os"
 	"time"
+
+	_ "go.uber.org/automaxprocs"
 )
 
 type event struct {
diff --git a/cmd/stfileinfo/main.go b/cmd/stfileinfo/main.go
index 2efb99611..762e51335 100644
--- a/cmd/stfileinfo/main.go
+++ b/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() {
diff --git a/cmd/stfinddevice/main.go b/cmd/stfinddevice/main.go
index f6e94a3ba..48f7f862e 100644
--- a/cmd/stfinddevice/main.go
+++ b/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
diff --git a/cmd/stfindignored/main.go b/cmd/stfindignored/main.go
index 7ec7969f3..cb93e07b1 100644
--- a/cmd/stfindignored/main.go
+++ b/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() {
diff --git a/cmd/stgenfiles/main.go b/cmd/stgenfiles/main.go
index e7b572257..a03f0ce29 100644
--- a/cmd/stgenfiles/main.go
+++ b/cmd/stgenfiles/main.go
@@ -15,6 +15,8 @@ import (
 	"os"
 	"path/filepath"
 	"time"
+
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {
diff --git a/cmd/strelaypoolsrv/main.go b/cmd/strelaypoolsrv/main.go
index 81bc11693..c3f8cc89d 100644
--- a/cmd/strelaypoolsrv/main.go
+++ b/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 {
diff --git a/cmd/strelaysrv/main.go b/cmd/strelaysrv/main.go
index bc24912f6..99000624a 100644
--- a/cmd/strelaysrv/main.go
+++ b/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 (
diff --git a/cmd/strelaysrv/testutil/main.go b/cmd/strelaysrv/testutil/main.go
index 4213c5251..6138d6bdf 100644
--- a/cmd/strelaysrv/testutil/main.go
+++ b/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() {
diff --git a/cmd/stsigtool/main.go b/cmd/stsigtool/main.go
index ab4c46b3e..021de6365 100644
--- a/cmd/stsigtool/main.go
+++ b/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() {
diff --git a/cmd/stupgrades/main.go b/cmd/stupgrades/main.go
index 3e4da7966..26c125988 100644
--- a/cmd/stupgrades/main.go
+++ b/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 {
diff --git a/cmd/stvanity/main.go b/cmd/stvanity/main.go
index 8917163b4..5ca9b2624 100644
--- a/cmd/stvanity/main.go
+++ b/cmd/stvanity/main.go
@@ -27,6 +27,7 @@ import (
 	"time"
 
 	"github.com/syncthing/syncthing/lib/protocol"
+	_ "go.uber.org/automaxprocs"
 )
 
 type result struct {
diff --git a/cmd/stwatchfile/main.go b/cmd/stwatchfile/main.go
index 0a8bd4dc1..73eebfdf4 100644
--- a/cmd/stwatchfile/main.go
+++ b/cmd/stwatchfile/main.go
@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/syncthing/syncthing/lib/sha256"
+	_ "go.uber.org/automaxprocs"
 )
 
 func main() {
diff --git a/cmd/syncthing/main.go b/cmd/syncthing/main.go
index 012aa92c6..fb19f1f28 100644
--- a/cmd/syncthing/main.go
+++ b/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"
diff --git a/cmd/ursrv/main.go b/cmd/ursrv/main.go
index 25bdb0446..7019dd966 100644
--- a/cmd/ursrv/main.go
+++ b/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 {
diff --git a/go.mod b/go.mod
index 6a3954339..2a7285444 100644
--- a/go.mod
+++ b/go.mod
@@ -38,6 +38,7 @@ require (
 	github.com/urfave/cli v1.22.14
 	github.com/vitrun/qart v0.0.0-20160531060029-bf64b92db6b0
 	github.com/willabides/kongplete v0.4.0
+	go.uber.org/automaxprocs v1.5.3
 	golang.org/x/crypto v0.19.0
 	golang.org/x/net v0.21.0
 	golang.org/x/sys v0.17.0
diff --git a/go.sum b/go.sum
index ef909d96e..d5687eddf 100644
--- a/go.sum
+++ b/go.sum
@@ -170,6 +170,8 @@ github.com/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSg
 github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
 github.com/power-devops/perfstat v0.0.0-20221212215047-62379fc7944b h1:0LFwY6Q3gMACTjAbMZBjXAqTOzOwFaj2Ld6cjeQ7Rig=
 github.com/power-devops/perfstat v0.0.0-20221212215047-62379fc7944b/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
+github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
+github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
 github.com/prometheus/client_golang v1.18.0 h1:HzFfmkOzH5Q8L8G+kSJKUx5dtG87sewO+FoDDqP5Tbk=
 github.com/prometheus/client_golang v1.18.0/go.mod h1:T+GXkCk5wSJyOqMIzVgvvjFDlkOQntgjkJWKrN5txjA=
 github.com/prometheus/client_model v0.5.0 h1:VQw1hfvPvk3Uv6Qf29VrPF32JB6rtbgI6cYPYQjL0Qw=
@@ -229,6 +231,8 @@ github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5t
 github.com/yusufpapurcu/wmi v1.2.3/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
 github.com/yusufpapurcu/wmi v1.2.4 h1:zFUKzehAFReQwLys1b/iSMl+JQGSCSjtVqQn9bBrPo0=
 github.com/yusufpapurcu/wmi v1.2.4/go.mod h1:SBZ9tNy3G9/m5Oi98Zks0QjeHVDvuK0qfxQmPyzfmi0=
+go.uber.org/automaxprocs v1.5.3 h1:kWazyxZUrS3Gs4qUpbwo5kEIMGe/DAvi5Z4tl2NW4j8=
+go.uber.org/automaxprocs v1.5.3/go.mod h1:eRbA25aqJrxAbsLO0xy5jVwPt7FQnRgjW+efnwa1WM0=
 go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
 go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=