From 7d69ac9c6701c3c4f10af84843a1c2736dfca53a Mon Sep 17 00:00:00 2001 From: Kyle Roth Date: Thu, 21 Apr 2022 12:07:05 -0400 Subject: [PATCH] first commit --- .github/workflows/go.yml | 24 +++ .github/workflows/release.yml | 26 +++ .gitignore | 1 + .golangci.yml | 143 ++++++++++++++++ LICENSE | 21 +++ Makefile | 46 +++++ README.md | 42 +++++ cmd/gpublame.go | 125 ++++++++++++++ count.go | 51 ++++++ go.mod | 10 ++ go.sum | 304 ++++++++++++++++++++++++++++++++++ pmon.go | 139 ++++++++++++++++ ps.go | 74 +++++++++ 13 files changed, 1006 insertions(+) create mode 100644 .github/workflows/go.yml create mode 100644 .github/workflows/release.yml create mode 100644 .gitignore create mode 100644 .golangci.yml create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README.md create mode 100644 cmd/gpublame.go create mode 100644 count.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 pmon.go create mode 100644 ps.go diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml new file mode 100644 index 0000000..5471bdf --- /dev/null +++ b/.github/workflows/go.yml @@ -0,0 +1,24 @@ +name: Go + +on: + push: + branches: [ main ] + pull_request: + branches: [ main ] + +jobs: + build: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + + - name: Set up Go + uses: actions/setup-go@v2 + with: + go-version: 1.18.1 + + - name: Lint + run: make fmt-check lint-check + + - name: Build + run: make build diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml new file mode 100644 index 0000000..151beaf --- /dev/null +++ b/.github/workflows/release.yml @@ -0,0 +1,26 @@ +name: Release + +on: + release: + types: [created] + +jobs: + release: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + + - name: Set up Go + uses: actions/setup-go@v2 + with: + go-version: 1.18.1 + + - name: Build release binaries + run: make release + + - name: Release to GitHub + uses: skx/github-action-publish-binaries@release-2.0 + env: + GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} + with: + args: 'bin/release/*' diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ba077a4 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +bin diff --git a/.golangci.yml b/.golangci.yml new file mode 100644 index 0000000..50d490c --- /dev/null +++ b/.golangci.yml @@ -0,0 +1,143 @@ +run: + # We don't use generics so we can enable all the linters that don't work with Go 1.18. + go: '1.17' + +linters-settings: + dupl: + threshold: 100 + exhaustive: + default-signifies-exhaustive: true + funlen: + lines: 100 + statements: 50 + goconst: + min-len: 2 + min-occurrences: 2 + gocritic: + enabled-tags: + - diagnostic + - experimental + - opinionated + - performance + - style + gocyclo: + min-complexity: 15 + goimports: + local-prefixes: github.com/kylrth/gpublame + gomnd: + settings: + mnd: + # don't include the "operation" and "assign" + checks: argument,case,condition,return + govet: + check-shadowing: true + enable-all: true + lll: + line-length: 100 + misspell: + locale: US + nolintlint: + allow-unused: false + allow-leading-space: false + require-explanation: true + require-specific: true + +issues: + exclude-rules: + # no gomnd on test files + - path: _test\.go + linters: + - gomnd + +linters: + disable-all: true + enable: + - asciicheck + - bidichk + - bodyclose + - containedctx + - contextcheck + - cyclop + - deadcode + - decorder + - depguard + - dogsled + - dupl + - durationcheck + - errcheck + - errchkjson + - errname + - errorlint + - exhaustive + - exportloopref + - forcetypeassert + - funlen + - gocognit + - goconst + - gocritic + - gocyclo + - godot + - godox + - gofmt + - gofumpt + - goimports + - gomoddirectives + - gomodguard + - goprintffuncname + - gosec + - gosimple + - grouper + - govet + - ifshort + - importas + - ineffassign + - ireturn + - lll + - maintidx + - makezero + - misspell + - nakedret + - nestif + - nilerr + - nilnil + - nlreturn + - noctx + - nolintlint + - paralleltest + - prealloc + - predeclared + - promlinter + - revive + - rowserrcheck + - sqlclosecheck + - staticcheck + - structcheck + - stylecheck + - tagliatelle + - tenv + - testpackage + - thelper + - tparallel + - typecheck + - unconvert + - unparam + - unused + - varcheck + - wastedassign + - whitespace + - wsl + # not enabled: + # - exhaustivestruct # This doesn't make sense to check for in most cases. + # - forbidigo # nothing to forbid + # - gci # prefer goimports + # - gochecknoglobals # I don't think globals should be universally disallowed. + # - gochecknoinits # I don't think init should be universally disallowed. + # - goerr113 # I think it's ok to include info in errors without defining a new type. + # - goheader # no need for a header + # - golint # deprecated + # - gomnd # prefer goconst + # - interfacer # deprecated + # - maligned # deprecated + # - scopelint # deprecated + # - varnamelen # I don't think this matters. + # - wrapcheck # I think this should only happen for public functions. diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..e048fa5 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2022 Kyle Roth + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..1bef8a5 --- /dev/null +++ b/Makefile @@ -0,0 +1,46 @@ +all: fmt-check lint-check build + +BINDIR := bin + +LINTER_VERSION := 1.45.2 +LINTER := $(BINDIR)/golangci-lint_$(LINTER_VERSION) +DEV_OS := $(shell uname -s | tr A-Z a-z) + +$(LINTER): + mkdir -p $(BINDIR) + wget "https://github.com/golangci/golangci-lint/releases/download/v$(LINTER_VERSION)/golangci-lint-$(LINTER_VERSION)-$(DEV_OS)-amd64.tar.gz" -O - \ + | tar -xz -C $(BINDIR) --strip-components=1 --exclude=README.md --exclude=LICENSE + mv $(BINDIR)/golangci-lint $(LINTER) + +.PHONY: fmt-check +fmt-check: + BADFILES=$$(gofmt -l -s -d $$(find . -type f -name '*.go')) && [ -z "$$BADFILES" ] && exit 0 + +.PHONY: lint-check +lint-check: $(LINTER) + $(LINTER) run --deadline=2m + +## DEBUG BUILDS + +GO_FILES = $(shell find . -type f -name '*.go') + +$(BINDIR)/gpublame: $(GO_FILES) + mkdir -p $(BINDIR) + go build -o $(BINDIR)/gpublame ./cmd + +.PHONY: build +build: $(BINDIR)/gpublame + +## RELEASE BUILDS + +RELEASEDIR := $(BINDIR)/release +ARCHES := amd64 arm arm64 + +# This rule expects targets with the format $(RELEASEDIR)/gpublame-GOARCH +$(RELEASEDIR)/gpublame-%: $(GO_FILES) + mkdir -p $(RELEASEDIR) + GOARCH=$(word 2,$(subst -, ,$@)) \ + go build -o $@ -ldflags "-s -w" ./cmd + +.PHONY: release +release: $(foreach arch,$(ARCHES),$(RELEASEDIR)/gpublame-$(arch)) diff --git a/README.md b/README.md new file mode 100644 index 0000000..c42eda7 --- /dev/null +++ b/README.md @@ -0,0 +1,42 @@ +# gpublame + +Want to find out who's hogging the GPU? `gpublame` gives you the proof you need to duke it out in the research group chat. + +`gpublame` depends on `nvidia-smi pmon`, which means monitoring is limited to a maximum of 4 devices. You should be able to use `CUDA_VISIBLE_DEVICES` to select which devices to show. If someone with more than 4 GPUs would like to help me test code to support more than 4 devices, please reach out. :) + +## installation + +Go to [Releases](https://github.com/kylrth/gpublame/releases) and download the latest release for your architecture to somewhere on your PATH, e.g.: + +```sh +wget 'https://github.com/kylrth/gpublame/releases/latest/download/gpublame-amd64' -O - | sudo tee /usr/bin/gpublame > /dev/null +sudo chmod +x /usr/bin/gpublame +``` + +Let me know if I don't build for your architecture so I can add it. + +## usage + +```sh +gpublame +``` + +Pretty simple. + +### package usage + +You can use some `gpublame` functionality in your own Go code: + +```go +import ( + "context" + + "github.com/kylrth/gpublame" +) + +func main() { + gpublame.Pmon(context.Background()) + + // ... +} +``` diff --git a/cmd/gpublame.go b/cmd/gpublame.go new file mode 100644 index 0000000..7701fa7 --- /dev/null +++ b/cmd/gpublame.go @@ -0,0 +1,125 @@ +package main + +import ( + "context" + "fmt" + "os" + "strings" + "time" + + "github.com/spf13/cobra" + + "github.com/kylrth/gpublame" +) + +func main() { + if err := cmd.Execute(); err != nil { + fmt.Fprintf(os.Stderr, "error: %v\n", err) + os.Exit(2) + } +} + +var cmd = &cobra.Command{ + Short: "Determine who's using the GPUs", + Args: cobra.NoArgs, + Run: func(*cobra.Command, []string) { + err := blame(verbosity) + if err != nil { + fmt.Fprintf(os.Stderr, "error: %v\n", err) + os.Exit(1) + } + }, +} + +var verbosity int + +func init() { + cmd.Flags().IntVarP(&verbosity, "verbosity", "v", 1, "Set desired verbosity (0-3). Verbosity "+ + ">= 2 includes the PGID of the process, and >= 3 includes the command that started the "+ + "process group.") +} + +// blame prints out who's using each GPU. +func blame(verbosity int) error { + processes, err := gpublame.Pmon(context.Background()) + if err != nil { + return fmt.Errorf("get GPU processes: %w", err) + } + + // a map from GPU ID to process groups using it. + usage := make(map[int][]gpublame.ProcessInfo) + + for _, process := range processes { + if process.Type != gpublame.ComputeProcessType { + continue + } + + var pi gpublame.ProcessInfo + + pi, err = gpublame.ProcessGroupInfo(process.PID) + if err != nil { + return fmt.Errorf("get process group info for PID %d: %w", process.PID, err) + } + + usage[process.GPU] = append(usage[process.GPU], pi) + } + + numGPUs, err := gpublame.CountGPUs(context.Background()) + if err != nil { + return fmt.Errorf("get number of GPUs: %w", err) + } + + printResults(usage, numGPUs, verbosity) + + return nil +} + +func printResults(usage map[int][]gpublame.ProcessInfo, numGPUs, verbosity int) { + maxID := numGPUs - 1 + now := time.Now() + + fmt.Println("GPU Users:") + + for id := 0; id <= maxID; id++ { + if len(usage[id]) == 0 { + fmt.Printf("%d:\n", id) + + continue + } + + var b strings.Builder + + b.WriteString(fmt.Sprintf("%d:", id)) + + for _, pi := range usage[id] { + b.WriteRune(' ') + b.WriteString(pi.User) + b.WriteRune('(') + b.WriteString(durationPrint(now.Sub(pi.Start))) + + if verbosity > 1 { + b.WriteString(fmt.Sprintf(",pgid=%d", pi.PID)) + + if verbosity > 2 { + b.WriteString(`,cmd="` + pi.Command + `"`) + } + } + + b.WriteString("),") + } + + fmt.Println(b.String()[:b.Len()-1]) + } +} + +// durationPrint is like (time.Duration).String() with the addition of days (e.g. "1d6h55m10s"). +func durationPrint(d time.Duration) string { + days := int(d.Hours() / 24) + if days == 0 { + return d.Round(time.Second).String() + } + + d -= time.Hour * time.Duration(24*days) + + return fmt.Sprintf("%dd%s", days, d.Round(time.Second).String()) +} diff --git a/count.go b/count.go new file mode 100644 index 0000000..ed1bfe8 --- /dev/null +++ b/count.go @@ -0,0 +1,51 @@ +package gpublame + +import ( + "bytes" + "context" + "fmt" + "io" + "os/exec" +) + +// CountGPUs returns the number of GPUs according to `nvidia-smi`. +func CountGPUs(ctx context.Context) (int, error) { + var stdout bytes.Buffer + + smi := exec.CommandContext(ctx, "nvidia-smi", "-L") + smi.Stdout = &stdout + + err := smi.Run() + if err != nil { + return 0, fmt.Errorf("run nvidia-smi: %w", err) + } + + cnt, err := lineCounter(&stdout) + if err != nil { + return cnt, fmt.Errorf("count lines: %w", err) + } + + return cnt, nil +} + +//nolint:lll // URL +// lineCounter is taken from +// https://stackoverflow.com/questions/24562942/golang-how-do-i-determine-the-number-of-lines-in-a-file-efficiently. +func lineCounter(r io.Reader) (int, error) { + buf := make([]byte, 32*1024) + count := 0 + lineSep := []byte{'\n'} + + for { + c, err := r.Read(buf) + count += bytes.Count(buf[:c], lineSep) + + switch { + case err == io.EOF: + return count, nil + + case err != nil: + return count, err + } + } +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..304faa9 --- /dev/null +++ b/go.mod @@ -0,0 +1,10 @@ +module github.com/kylrth/gpublame + +go 1.18 + +require github.com/spf13/cobra v1.4.0 + +require ( + github.com/inconshreveable/mousetrap v1.0.0 // indirect + github.com/spf13/pflag v1.0.5 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3eb98ae --- /dev/null +++ b/go.sum @@ -0,0 +1,304 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go 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`nvidia-smi pmon` for one process. +type CUDAProcessInfo struct { + Command string + Type string + GPU int + PID int + Sm int + Mem int + Enc int + Dec int +} + +// There are two process types, (C)ompute and (G)raphics. +const ( + GraphicsProcessType = "G" + ComputeProcessType = "C" +) + +// Pmon returns a structured version of the output of `nvidia-smi pmon -c 1`. An important +// distinction is that while the command returns prints lines for idle GPUs, Pmon does not return +// anything for them. +func Pmon(ctx context.Context) ([]CUDAProcessInfo, error) { + var stdout bytes.Buffer + + ps := exec.CommandContext(ctx, "nvidia-smi", "pmon", "-c", "1") // only print once + ps.Stdout = &stdout + + err := ps.Run() + if err != nil { + return nil, fmt.Errorf("execute pmon: %w", err) + } + + scanner := bufio.NewScanner(&stdout) + + var out []CUDAProcessInfo + + for scanner.Scan() { + text := strings.TrimSpace(scanner.Text()) + + // Skip header lines. + if strings.HasPrefix(text, "#") { + continue + } + + pi, err := parseLine(text) + if err != nil { + return out, fmt.Errorf("parse line %d: %w", len(out)+3, err) + } + + if pi.PID == -1 { + // idle GPU + continue + } + + out = append(out, pi) + } + + if scanner.Err() == nil { + return out, ctx.Err() + } + + return out, scanner.Err() +} + +// ParseError can be returned when there was a problem parsing output from a command. +type ParseError struct { + err string + line string +} + +// Error returns the error. +func (e *ParseError) Error() string { + return fmt.Sprintf("%s (line: '%s')", e.err, e.line) +} + +func parseLine(line string) (out CUDAProcessInfo, err error) { + fields := strings.Fields(strings.TrimSpace(line)) + + if len(fields) < 8 { + return CUDAProcessInfo{}, &ParseError{"wrong number of fields in pmon output", line} + } + + out.GPU, err = strconv.Atoi(fields[0]) + if err != nil { + return out, fmt.Errorf("parse GPU ID: %w", err) + } + + out.PID, err = atoi(fields[1], -1) + if err != nil { + return out, fmt.Errorf("parse PID: %w", err) + } + + out.Type = fields[2] + + out.Sm, err = atoi(fields[3], 0) + if err != nil { + return out, fmt.Errorf("parse sm: %w", err) + } + + out.Mem, err = atoi(fields[4], 0) + if err != nil { + return out, fmt.Errorf("parse mem: %w", err) + } + + out.Enc, err = atoi(fields[5], 0) + if err != nil { + return out, fmt.Errorf("parse enc: %w", err) + } + + out.Dec, err = atoi(fields[6], 0) + if err != nil { + return out, fmt.Errorf("parse dec: %w", err) + } + + out.Command = strings.Join(fields[7:], " ") + + return out, nil +} + +// atoi is like strconv.Atoi but also "-" maps to `or`. +func atoi(s string, or int) (int, error) { + if s == "-" { + return or, nil + } + + return strconv.Atoi(s) +} diff --git a/ps.go b/ps.go new file mode 100644 index 0000000..d4c29db --- /dev/null +++ b/ps.go @@ -0,0 +1,74 @@ +package gpublame + +import ( + "bytes" + "fmt" + "os/exec" + "strconv" + "strings" + "time" +) + +// PGID returns the process group ID for a specified process. +func PGID(pid int) (int, error) { + var stdout bytes.Buffer + + //nolint:gosec // The PID will always be an int, so this is safe. + ps := exec.Command("ps", "-heo", "pgid", "-q", strconv.Itoa(pid)) + ps.Stdout = &stdout + + if err := ps.Run(); err != nil { + return 0, fmt.Errorf("ps: %w", err) + } + + return strconv.Atoi(strings.TrimSpace(stdout.String())) +} + +// ProcessInfo is the information returned by ps for a single process. +type ProcessInfo struct { + Start time.Time + User string + Command string + PID int +} + +// ProcessGroupInfo returns information provided by ps for the process group of the specified +// process. +func ProcessGroupInfo(pid int) (ProcessInfo, error) { + pgid, err := PGID(pid) + if err != nil { + return ProcessInfo{}, fmt.Errorf("get PGID: %w", err) + } + + var stdout bytes.Buffer + + //nolint:gosec // The PGID will always be an int, so this is safe. + ps := exec.Command("ps", "-heo", "user,lstart,cmd", "-q", strconv.Itoa(pgid)) + ps.Stdout = &stdout + + err = ps.Run() + if err != nil { + return ProcessInfo{}, fmt.Errorf("find user for PID %d: %w", pid, err) + } + + return processInfoFromFields(stdout.String(), pgid) +} + +func processInfoFromFields(s string, pid int) (p ProcessInfo, err error) { + fields := strings.Fields(s) + + if len(fields) < 7 { + return p, &ParseError{fmt.Sprintf("expected 7 fields; got %d", len(fields)), s} + } + + p.Start, err = time.Parse("Mon Jan _2 15:04:05 2006", strings.Join(fields[1:6], " ")) + if err != nil { + return p, fmt.Errorf("invalid time field: %w", err) + } + + p.User = fields[0] + p.PID = pid + p.Command = strings.Join(fields[6:], " ") + + return p, nil +}