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 6f76e4735b..18957bfc72 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 62565be5e8..3a3f0174ea 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 197466a9a4..788b146575 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 7b820fcc4b..d0e52d0311 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 f7f968c86d..fa1ce3b721 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 b723ab5422..92224a7d68 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 2efb99611b..762e51335f 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 f6e94a3ba5..48f7f862e7 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 7ec7969f34..cb93e07b1d 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 e7b572257d..a03f0ce29f 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 81bc116933..c3f8cc89d1 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 bc24912f6b..99000624ae 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 4213c52514..6138d6bdf4 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 ab4c46b3e8..021de6365e 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 3e4da7966b..26c1259885 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 8917163b47..5ca9b2624a 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 0a8bd4dc18..73eebfdf40 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 012aa92c63..fb19f1f280 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 25bdb0446e..7019dd9660 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 6a3954339f..2a72854442 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 ef909d96ec..d5687eddf2 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=