// clusteringHandler handles doing the actual k-means clustering.
//
// The return format is JSON of the form:
//
// {
// "Clusters": [
// {
// "Keys": [
// "x86:GeForce320M:MacMini4.1:Mac10.8:GM_varied_text_clipped_no_lcd_640_480:8888",...],
// "ParamSummaries": [
// [{"Value": "Win8", "Weight": 15}, {"Value": "Android", "Weight": 14}, ...]
// ],
// "StepFit": {
// "LeastSquares":0.0006582442047814354,
// "TurningPoint":162,
// "StepSize":0.023272272692293046,
// "Regression": 35.3
// }
// Traces: [[[0, -0.00007967326606768456], [1, 0.011877665949459049], [2, 0.012158129176717419],...]]
// },
// ...
// ],
// "K": 5,
// "StdDevThreshhold": 0.1
// }
//
// Note that Keys contains all the keys, while Traces only contains traces of
// the N closest cluster members and the centroid.
//
// Takes the following query parameters:
//
// _k - The K to use for k-means clustering.
// _stddev - The standard deviation to use when normalize traces
// during k-means clustering.
// _issue - The Rietveld issue ID with trybot results to include.
//
// Additionally the rest of the query parameters as returned from
// sk.Query.selectionsAsQuery().
func clusteringHandler(w http.ResponseWriter, r *http.Request) {
glog.Infof("Clustering Handler: %q\n", r.URL.Path)
tile := masterTileBuilder.GetTile()
w.Header().Set("Content-Type", "application/json")
// If there are no query parameters just return with an empty set of ClusterSummaries.
if r.FormValue("_k") == "" || r.FormValue("_stddev") == "" {
writeClusterSummaries(clustering.NewClusterSummaries(), w, r)
return
}
k, err := strconv.ParseInt(r.FormValue("_k"), 10, 32)
if err != nil {
util.ReportError(w, r, err, fmt.Sprintf("_k parameter must be an integer %s.", r.FormValue("_k")))
return
}
stddev, err := strconv.ParseFloat(r.FormValue("_stddev"), 64)
if err != nil {
util.ReportError(w, r, err, fmt.Sprintf("_stddev parameter must be a float %s.", r.FormValue("_stddev")))
return
}
issue := r.FormValue("_issue")
var tryResults *types.TryBotResults = nil
if issue != "" {
var err error
tryResults, err = trybot.Get(issue)
if err != nil {
util.ReportError(w, r, err, fmt.Sprintf("Failed to get trybot data for clustering."))
return
}
}
delete(r.Form, "_k")
delete(r.Form, "_stddev")
delete(r.Form, "_issue")
// Create a filter function for traces that match the query parameters and
// optionally tryResults.
filter := func(key string, tr *types.PerfTrace) bool {
if tryResults != nil {
if _, ok := tryResults.Values[key]; !ok {
return false
}
}
return tiling.Matches(tr, r.Form)
}
if issue != "" {
if tile, err = trybot.TileWithTryData(tile, issue); err != nil {
util.ReportError(w, r, err, fmt.Sprintf("Failed to get trybot data for clustering."))
return
}
}
summary, err := clustering.CalculateClusterSummaries(tile, int(k), stddev, filter)
if err != nil {
util.ReportError(w, r, err, "Failed to calculate clusters.")
return
}
writeClusterSummaries(summary, w, r)
}
// queryHandler handles queries for and about traces.
//
// Queries look like:
//
// /query/0/-1/?arch=Arm7&arch=x86&scale=1
//
// Where they keys and values in the query params are from the ParamSet.
// Repeated parameters are matched via OR. I.e. the above query will include
// anything that has an arch of Arm7 or x86.
//
// The first two path paramters are tile scale and tile number, where -1 means
// the last tile at the given scale.
//
// The normal response is JSON of the form:
//
// {
// "matches": 187,
// }
//
// If the path is:
//
// /query/0/-1/traces/?arch=Arm7&arch=x86&scale=1
//
// Then the response is the set of traces that match that query.
//
// {
// "traces": [
// {
// // All of these keys and values should be exactly what Flot consumes.
// data: [[1, 1.1], [20, 30]],
// label: "key1",
// _params: {"os: "Android", ...}
// },
// {
// data: [[1.2, 2.1], [20, 35]],
// label: "key2",
// _params: {"os: "Android", ...}
// }
// ]
// }
//
// If the path is:
//
// /query/0/-1/traces/?__shortcut=11
//
// Then the traces in the shortcut with that ID are returned, along with the
// git hash at the step function, if the shortcut came from an alert.
//
// {
// "traces": [
// {
// // All of these keys and values should be exactly what Flot consumes.
// data: [[1, 1.1], [20, 30]],
// label: "key1",
// _params: {"os: "Android", ...}
// },
// ...
// ],
// "hash": "a012334...",
// }
//
//
// TODO Add ability to query across a range of tiles.
func queryHandler(w http.ResponseWriter, r *http.Request) {
glog.Infof("Query Handler: %q\n", r.URL.Path)
match := queryHandlerPath.FindStringSubmatch(r.URL.Path)
glog.Infof("%#v", match)
if r.Method != "GET" || match == nil || len(match) != 4 {
http.NotFound(w, r)
return
}
if err := r.ParseForm(); err != nil {
util.ReportError(w, r, err, "Failed to parse query params.")
}
tileScale, err := strconv.ParseInt(match[1], 10, 0)
if err != nil {
util.ReportError(w, r, err, "Failed parsing tile scale.")
return
}
tileNumber, err := strconv.ParseInt(match[2], 10, 0)
if err != nil {
util.ReportError(w, r, err, "Failed parsing tile number.")
return
}
glog.Infof("tile: %d %d", tileScale, tileNumber)
tile := masterTileBuilder.GetTile()
w.Header().Set("Content-Type", "application/json")
ret := &QueryResponse{
Traces: []*tiling.TraceGUI{},
Hash: "",
}
if match[3] == "" {
// We only want the count.
total := 0
for _, tr := range tile.Traces {
if tiling.Matches(tr, r.Form) {
total++
}
}
glog.Info("Count: ", total)
inc := json.NewEncoder(w)
if err := inc.Encode(map[string]int{"matches": total}); err != nil {
glog.Errorf("Failed to write or encode output: %s", err)
return
}
} else {
// We want the matching traces.
shortcutID := r.Form.Get("__shortcut")
if shortcutID != "" {
sh, err := shortcut.Get(shortcutID)
if err != nil {
http.NotFound(w, r)
return
}
if sh.Issue != "" {
if tile, err = trybot.TileWithTryData(tile, sh.Issue); err != nil {
util.ReportError(w, r, err, "Failed to populate shortcut data with trybot result.")
return
}
}
ret.Hash = sh.Hash
for _, k := range sh.Keys {
if tr, ok := tile.Traces[k]; ok {
tg := traceGuiFromTrace(tr.(*types.PerfTrace), k, tile)
if tg != nil {
ret.Traces = append(ret.Traces, tg)
}
} else if tiling.IsFormulaID(k) {
// Re-evaluate the formula and add all the results to the response.
formula := tiling.FormulaFromID(k)
if err := addCalculatedTraces(ret, tile, formula); err != nil {
glog.Errorf("Failed evaluating formula (%q) while processing shortcut %s: %s", formula, shortcutID, err)
}
} else if strings.HasPrefix(k, "!") {
glog.Errorf("A calculated trace is slipped through: (%s) in shortcut %s: %s", k, shortcutID, err)
}
}
} else {
for key, tr := range tile.Traces {
if tiling.Matches(tr, r.Form) {
tg := traceGuiFromTrace(tr.(*types.PerfTrace), key, tile)
if tg != nil {
ret.Traces = append(ret.Traces, tg)
}
}
}
}
enc := json.NewEncoder(w)
if err := enc.Encode(ret); err != nil {
glog.Errorf("Failed to write or encode output: %s", err)
return
}
}
}