perf(zb): cleanup tool output (#1033)

Signed-off-by: Ramkumar Chinchani <rchincha@cisco.com>

README.md

@@ -309,54 +309,10 @@ will produce `bin/zb` binary.
 
 ## Running `zb`
 
-```console
+See [details](./cmd/zb/README.md)
-$ zb -c 10 -n 1000 http://localhost:8080
-
-Registry URL: http://localhost:8080
-
-Concurrency Level: 2
-Total requests:    100
-Working dir:
-
-============
-Test name:            Get Catalog
-Time taken for tests: 45.397205ms
-Complete requests:    100
-Failed requests:      0
-Requests per second:  2202.7788
-
-2xx responses: 100
-
-min: 402.259µs
-max: 3.295887ms
-p50: 855.045µs
-p75: 971.709µs
-p90: 1.127389ms
-p99: 3.295887ms
-
-============
-Test name:            Push Monolith 1MB
-Time taken for tests: 952.336383ms
-Complete requests:    100
-Failed requests:      0
-Requests per second:  105.00491
-
-2xx responses: 100
-
-min: 11.125673ms
-max: 26.375356ms
-p50: 18.917253ms
-p75: 21.753441ms
-p90: 24.02137ms
-p99: 26.375356ms
-
-...
-```
-
 
 # Ecosystem
 
-
 ## skopeo
 
 [skopeo](https://github.com/containers/skopeo) is a tool to work with remote

cmd/zb/README.md

@@ -25,6 +25,56 @@ Flags:
 ./bin/zb-linux-amd64 -c 10 -n 100 --src-cidr 127.0.0.0/8 -A user:pass http://localhost:8080
 ```
 
+```
+docker run -net=host -it ghcr.io/project-zot/zb-linux-amd64:latest -c 2 -n 10 -s 127.0.0.0/8 http://localhost:5000
+```
+
+## Command output
+
+```console
+$ zb -c 10 -n 1000 http://localhost:8080
+
+Registry URL: http://localhost:8080
+
+Concurrency Level: 2
+Total requests:    100
+Working dir:
+
+============
+Test name:            Get Catalog
+Time taken for tests: 45.397205ms
+Complete requests:    100
+Failed requests:      0
+Requests per second:  2202.7788
+
+2xx responses: 100
+
+min: 402.259µs
+max: 3.295887ms
+p50: 855.045µs
+p75: 971.709µs
+p90: 1.127389ms
+p99: 3.295887ms
+
+============
+Test name:            Push Monolith 1MB
+Time taken for tests: 952.336383ms
+Complete requests:    100
+Failed requests:      0
+Requests per second:  105.00491
+
+2xx responses: 100
+
+min: 11.125673ms
+max: 26.375356ms
+p50: 18.917253ms
+p75: 21.753441ms
+p90: 24.02137ms
+p99: 26.375356ms
+
+...
+```
+
 # References
 
 [1] [https://github.com/opencontainers/distribution-spec/tree/main/conformance](https://github.com/opencontainers/distribution-spec/tree/main/conformance)

cmd/zb/perf.go

@@ -640,21 +640,35 @@ func Perf(
 	log.SetFlags(0)
 	log.SetOutput(tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', tabwriter.TabIndent))
 
-	// initialize test data
-	setup(workdir)
-	defer teardown(workdir)
-
 	// common header
 	log.Printf("Registry URL:\t%s", url)
 	log.Printf("\n")
 	log.Printf("Concurrency Level:\t%v", concurrency)
 	log.Printf("Total requests:\t%v", requests)
+
+	if workdir == "" {
+		cwd, err := os.Getwd()
+		if err != nil {
+			log.Fatal("unable to get current working dir")
+		}
+
+		log.Printf("Working dir:\t%v", cwd)
+	} else {
 		log.Printf("Working dir:\t%v", workdir)
+	}
+
 	log.Printf("\n")
 
-	zbError := false
+	// initialize test data
+	log.Printf("Preparing test data ...\n")
+
+	setup(workdir)
+	defer teardown(workdir)
+
+	log.Printf("Starting tests ...\n")
 
 	var err error
+	zbError := false
 
 	// get host ips from command line to make requests from
 	var ips []string