have bagent add metadata to results

need this to differentiate multiple agents' output when it's all going to stdout.

bench/diagonal.go

@@ -13,10 +13,10 @@ import (
 // DiagonalSetBits sets bits with increasing profile id and bitmap id.
 type DiagonalSetBits struct {
 	HasClient
-	BaseBitmapID  int
-	BaseProfileID int
-	Iterations    int
-	DB            string
+	BaseBitmapID  int    `json:"base-bitmap-id"`
+	BaseProfileID int    `json:"base-profile-id"`
+	Iterations    int    `json:"iterations"`
+	DB            string `json:"db"`
 }
 
 func (b *DiagonalSetBits) Usage() string {

bench/multidb.go

@@ -12,9 +12,9 @@ import (
 // MultiDBSetBits sets bits with increasing profile id and bitmap id.
 type MultiDBSetBits struct {
 	HasClient
-	BaseBitmapID  int
-	BaseProfileID int
-	Iterations    int
+	BaseBitmapID  int `json:"base-bitmap-id"`
+	BaseProfileID int `json:"base-profile-id"`
+	Iterations    int `json:"iterations"`
 }
 
 func (b *MultiDBSetBits) Usage() string {

bench/random.go

@@ -14,14 +14,13 @@ import (
 // RandomSetBits sets bits randomly and deterministically based on a seed.
 type RandomSetBits struct {
 	HasClient
-	BaseBitmapID   int64
-	BaseProfileID  int64
-	BitmapIDRange  int64
-	ProfileIDRange int64
-	Iterations     int // number of bits that will be set
-	Seed           int64
-	DB             string // DB to use in pilosa.
-
+	BaseBitmapID   int64  `json:"base-bitmap-id"`
+	BaseProfileID  int64  `json:"base-profile-id"`
+	BitmapIDRange  int64  `json:"bitmap-id-range"`
+	ProfileIDRange int64  `json:"profile-id-range"`
+	Iterations     int    `json:"iterations"`
+	Seed           int64  `json:"seed"`
+	DB             string `json:"db"`
 }
 
 func (b *RandomSetBits) Usage() string {

cmd/pilosactl/main.go

@@ -1152,18 +1152,20 @@ func (cmd *CreateCommand) Run(ctx context.Context) error {
 // on the command line.
 type BagentCommand struct {
 	// Slice of Benchmarks which will be run serially.
-	Benchmarks []bench.Benchmark
+	Benchmarks []bench.Benchmark `json:"benchmarks"`
 	// AgentNum will be passed to each benchmark's Run method so that it can
 	// parameterize its behavior.
-	AgentNum int
-	// Slice of pilosa hosts to run the Benchmarks against.
-	Hosts []string
+	AgentNum int `json:"agent-num"`
+
 	// Enable pretty printing of results, for human consumption.
 	HumanReadable bool
 
-	Stdin  io.Reader
-	Stdout io.Writer
-	Stderr io.Writer
+	// Slice of pilosa hosts to run the Benchmarks against.
+	Hosts []string `json:"hosts"`
+
+	Stdin  io.Reader `json:"-"`
+	Stdout io.Writer `json:"-"`
+	Stderr io.Writer `json:"-"`
 }
 
 // NewBagentCommand returns a new instance of BagentCommand.
@@ -1280,6 +1282,7 @@ func (cmd *BagentCommand) Run(ctx context.Context) error {
 	}
 
 	res := sbm.Run(ctx, cmd.AgentNum)
+	res["metadata"] = cmd
 	enc := json.NewEncoder(cmd.Stdout)
 	enc.SetIndent("", "  ")
 	if cmd.HumanReadable {