Regres: Limit the default number of threads to 100

Going above this causes mayhem on my 3990x. Given that this is pretty much top end hardware, I don't think anything else in existance could cope with more than 100. Change-Id: I8b6e4ad09312655c59084aaf5185bb99ee459bdb Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/44016Tested-by: Ben Clayton <bclayton@google.com> Kokoro-Result: kokoro <noreply+kokoro@google.com> Reviewed-by: Antonio Maiorano <amaiorano@google.com>

Regres: Limit the default number of threads to 100
4d89b581 · Ben Clayton · ccaa8e84 · 4d89b581
Commit 4d89b581 authored Apr 17, 2020 by Ben Clayton
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main.go tests/regres/cmd/run_testlist/main.go +8 -1

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--- a/tests/regres/cmd/run_testlist/main.go
+++ b/tests/regres/cmd/run_testlist/main.go
@@ -45,10 +45,17 @@ import (
 	"../../util"
 )

+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
 var (
 	deqpVkBinary  = flag.String("deqp-vk", "deqp-vk", "path to the deqp-vk binary")
 	testList      = flag.String("test-list", "vk-master-PASS.txt", "path to a test list file")
-	numThreads    = flag.Int("num-threads", runtime.NumCPU(), "number of parallel test runner processes")
+	numThreads    = flag.Int("num-threads", min(runtime.NumCPU(), 100), "number of parallel test runner processes")
 	maxProcMemory = flag.Uint64("max-proc-mem", shell.MaxProcMemory, "maximum virtual memory per child process")
 	output        = flag.String("output", "results.json", "path to an output JSON results file")
 	filter        = flag.String("filter", "", "filter for test names. Start with a '/' to indicate regex")