dashboard: add linux-arm64-aws to set of trybots

This change adds linux-arm64-aws to the set of trybots. It also
removes linux-arm and linux-arm64 from the list of builds attempted in
the misc-compile-linuxarm builder.

Updates golang/go#36170
Fixes golang/go#45065

Change-Id: If25fed08e35b2a91c9c9dbbf31701ff5464dc913
Reviewed-on: https://go-review.googlesource.com/c/build/+/303232
Trust: Carlos Amedee <carlos@golang.org>
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

Author: cagedmantis

cmd/coordinator/coordinator_test.go

@@ -324,7 +324,7 @@ func TestSlowBotsFromComments(t *testing.T) {
 	for _, bc := range slowBots {
 		got = append(got, bc.Name)
 	}
-	want := []string{"aix-ppc64", "darwin-amd64-10_14", "linux-arm64-packet"}
+	want := []string{"aix-ppc64", "darwin-amd64-10_14", "linux-arm64-aws"}
 	if !reflect.DeepEqual(got, want) {
 		t.Errorf("mismatch:\n got: %q\nwant: %q\n", got, want)
 	}

dashboard/builders.go

@@ -37,7 +37,7 @@ var slowBotAliases = map[string]string{
 	"android-arm":          "android-arm-corellium",
 	"android-arm64":        "android-arm64-corellium",
 	"arm":                  "linux-arm-aws",
-	"arm64":                "linux-arm64-packet",
+	"arm64":                "linux-arm64-aws",
 	"darwin":               "darwin-amd64-10_14",
 	"darwin-amd64":         "darwin-amd64-10_14",
 	"darwin-arm64":         "darwin-arm64-11_0-toothrot",
@@ -53,7 +53,7 @@ var slowBotAliases = map[string]string{
 	"js":                   "js-wasm",
 	"linux":                "linux-amd64",
 	"linux-arm":            "linux-arm-aws",
-	"linux-arm64":          "linux-arm64-packet",
+	"linux-arm64":          "linux-arm64-aws",
 	"linux-mips":           "linux-mips-rtrk",
 	"linux-mips64":         "linux-mips64-rtrk",
 	"linux-mips64le":       "linux-mips64le-mengzhuo",
@@ -1600,7 +1600,7 @@ func init() {
 	// for all supported Go versions.
 	addMiscCompile := func(suffix, rx string) { addMiscCompileGo1(0, suffix, rx) }
 
-	addMiscCompile("-linuxarm", "^linux-arm")                // 2: arm, arm64
+	addMiscCompile("-linuxarm", "^linux-arm-arm5$")          // 1: linux/arm with GOARM=5
 	addMiscCompile("-darwin", "^darwin-(386|amd64)$")        // 1: amd64
 	addMiscCompileGo1(16, "-darwinarm64", "^darwin-arm64$")  // 1: arm64 (for Go 1.16 and newer)
 	addMiscCompile("-mips", "^linux-mips")                   // 4: mips, mipsle, mips64, mips64le
@@ -2410,8 +2410,10 @@ func init() {
 		FlakyNet: true, // maybe not flaky, but here conservatively
 	})
 	addBuilder(BuildConfig{
-		Name:     "linux-arm64-aws",
-		HostType: "host-linux-arm64-aws",
+		Name:              "linux-arm64-aws",
+		HostType:          "host-linux-arm64-aws",
+		tryBot:            defaultTrySet(),
+		numTryTestHelpers: 1,
 	})
 	addBuilder(BuildConfig{
 		Name:              "linux-arm-aws",

dashboard/builders_test.go

@@ -98,6 +98,7 @@ func TestTrybots(t *testing.T) {
 				"linux-amd64",
 				"linux-amd64-race",
 				"linux-arm-aws",
+				"linux-arm64-aws",
 				"misc-compile-darwin",
 				"misc-compile-darwinarm64",
 				"misc-compile-freebsd",
@@ -125,6 +126,7 @@ func TestTrybots(t *testing.T) {
 				"linux-amd64",
 				"linux-amd64-race",
 				"linux-arm-aws",
+				"linux-arm64-aws",
 				"misc-compile-darwin",
 				"misc-compile-darwinarm64",
 				"misc-compile-freebsd",
@@ -152,6 +154,7 @@ func TestTrybots(t *testing.T) {
 				"linux-amd64",
 				"linux-amd64-race",
 				"linux-arm-aws",
+				"linux-arm64-aws",
 				"misc-compile-darwin",
 				"misc-compile-darwinarm64", // Starts with Go 1.16.
 				"misc-compile-freebsd",
@@ -184,6 +187,7 @@ func TestTrybots(t *testing.T) {
 				"linux-amd64",
 				"linux-amd64-race",
 				"linux-arm-aws",
+				"linux-arm64-aws",
 				"misc-compile-darwin",
 				"misc-compile-freebsd",
 				"misc-compile-linuxarm",
@@ -224,6 +228,7 @@ func TestTrybots(t *testing.T) {
 				"linux-amd64",
 				"linux-amd64-race",
 				"linux-arm-aws",
+				"linux-arm64-aws",
 				"netbsd-amd64-9_0",
 				"openbsd-386-68",
 				"openbsd-amd64-68",