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Improve support for block/mutex contention in pprof

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This commit is contained in:
Dane Everitt 2022-01-30 21:02:18 -05:00
parent 4b702052c7
commit 0f9f80c181
2 changed files with 9 additions and 1 deletions
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2
Makefile
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@ -6,7 +6,7 @@ build:
debug: debug:
go build -ldflags="-X github.com/pterodactyl/wings/system.Version=$(GIT_HEAD)" go build -ldflags="-X github.com/pterodactyl/wings/system.Version=$(GIT_HEAD)"
sudo ./wings --debug --ignore-certificate-errors --config config.yml --pprof sudo ./wings --debug --ignore-certificate-errors --config config.yml --pprof --pprof-block-rate 1
# Runs a remotly debuggable session for Wings allowing an IDE to connect and target # Runs a remotly debuggable session for Wings allowing an IDE to connect and target
# different breakpoints. # different breakpoints.

8
cmd/root.go
View File

@ -11,6 +11,7 @@ import (
"os" "os"
"path" "path"
"path/filepath" "path/filepath"
"runtime"
"strconv" "strconv"
"strings" "strings"
"time" "time"
@ -76,6 +77,7 @@ func init() {
// Flags specifically used when running the API. // Flags specifically used when running the API.
rootCommand.Flags().Bool("pprof", false, "if the pprof profiler should be enabled. The profiler will bind to localhost:6060 by default") rootCommand.Flags().Bool("pprof", false, "if the pprof profiler should be enabled. The profiler will bind to localhost:6060 by default")
rootCommand.Flags().Int("pprof-block-rate", 0, "enables block profile support, may have performance impacts")
rootCommand.Flags().Int("pprof-port", 6060, "If provided with --pprof, the port it will run on") rootCommand.Flags().Int("pprof-port", 6060, "If provided with --pprof, the port it will run on")
rootCommand.Flags().Bool("auto-tls", false, "pass in order to have wings generate and manage it's own SSL certificates using Let's Encrypt") rootCommand.Flags().Bool("auto-tls", false, "pass in order to have wings generate and manage it's own SSL certificates using Let's Encrypt")
rootCommand.Flags().String("tls-hostname", "", "required with --auto-tls, the FQDN for the generated SSL certificate") rootCommand.Flags().String("tls-hostname", "", "required with --auto-tls, the FQDN for the generated SSL certificate")
@ -309,6 +311,12 @@ func rootCmdRun(cmd *cobra.Command, _ []string) {
profile, _ := cmd.Flags().GetBool("pprof") profile, _ := cmd.Flags().GetBool("pprof")
if profile { if profile {
if r, _ := cmd.Flags().GetInt("pprof-block-rate"); r > 0 {
runtime.SetBlockProfileRate(r)
}
// Catch at least 1% of mutex contention issues.
runtime.SetMutexProfileFraction(100)
profilePort, _ := cmd.Flags().GetInt("pprof-port") profilePort, _ := cmd.Flags().GetInt("pprof-port")
go func() { go func() {
http.ListenAndServe(fmt.Sprintf("localhost:%d", profilePort), nil) http.ListenAndServe(fmt.Sprintf("localhost:%d", profilePort), nil)