Add automaxprocs.

This will automate the setting of GOMAXPROCS in Kubernetes/docker environments
where it is not already set as part of the deployment.

Setting GOMAXPROCS to match resource limits (rather than the total core count
of the node) allows Go to more efficiently use the available cores and
reduces CPU throttling (eliminating it if limits are set to an integer number
of cores).

This issue was highlighted during benchmarking but probably effects a large
number of real world Kubernetes deployments where CPU limits are set but
GOMAXPROCS is not.

cmd/server/main.go

@@ -33,6 +33,7 @@ import (
 	_ "time/tzdata" // embed tzdata as a fallback
 
 	"github.com/urfave/cli/v2"
+	_ "go.uber.org/automaxprocs"
 
 	"go.temporal.io/server/common/authorization"
 	"go.temporal.io/server/common/build"

go.mod

@@ -48,6 +48,7 @@ require (
 	go.temporal.io/sdk v1.22.1
 	go.temporal.io/version v0.3.0
 	go.uber.org/atomic v1.10.0
+	go.uber.org/automaxprocs v1.5.2
 	go.uber.org/fx v1.19.1
 	go.uber.org/multierr v1.9.0
 	go.uber.org/zap v1.24.0

go.sum

@@ -970,6 +970,7 @@ github.com/pkg/sftp v1.10.1/go.mod h1:lYOWFsE0bwd1+KfKJaKeuokY15vzFx25BLbzYYoAxZ
 github.com/pkg/sftp v1.13.1/go.mod h1:3HaPG6Dq1ILlpPZRO0HVMrsydcdLt6HRDccSgb87qRg=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
 github.com/prashantv/protectmem v0.0.0-20171002184600-e20412882b3a h1:AA9vgIBDjMHPC2McaGPojgV2dcI78ZC0TLNhYCXEKH8=
 github.com/prashantv/protectmem v0.0.0-20171002184600-e20412882b3a/go.mod h1:lzZQ3Noex5pfAy7mkAeCjcBDteYU85uWWnJ/y6gKU8k=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
@@ -1129,6 +1130,8 @@ go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ=
 go.uber.org/atomic v1.10.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
+go.uber.org/automaxprocs v1.5.2 h1:2LxUOGiR3O6tw8ui5sZa2LAaHnsviZdVOUZw4fvbnME=
+go.uber.org/automaxprocs v1.5.2/go.mod h1:eRbA25aqJrxAbsLO0xy5jVwPt7FQnRgjW+efnwa1WM0=
 go.uber.org/dig v1.16.1 h1:+alNIBsl0qfY0j6epRubp/9obgtrObRAc5aD+6jbWY8=
 go.uber.org/dig v1.16.1/go.mod h1:557JTAUZT5bUK0SvCwikmLPPtdQhfvLYtO5tJgQSbnk=
 go.uber.org/fx v1.19.1 h1:JwYIYAQzXBuBBwSZ1/tn/95pnQO/Sp3yE8lWj9eSAzI=