Add system info to start of testsuite. Profile: don't spawn profile listener on windows (#44639)

Author: IanButterworth

stdlib/Profile/src/Profile.jl

@@ -140,9 +140,12 @@ function __init__()
         delay = 0.001
     end
     init(n, delay, limitwarn = false)
-    PROFILE_PRINT_COND[] = Base.AsyncCondition()
-    ccall(:jl_set_peek_cond, Cvoid, (Ptr{Cvoid},), PROFILE_PRINT_COND[].handle)
-    errormonitor(Threads.@spawn(profile_printing_listener()))
+    @static if !Sys.iswindows()
+        # triggering a profile via signals is not implemented on windows
+        PROFILE_PRINT_COND[] = Base.AsyncCondition()
+        ccall(:jl_set_peek_cond, Cvoid, (Ptr{Cvoid},), PROFILE_PRINT_COND[].handle)
+        errormonitor(Threads.@spawn(profile_printing_listener()))
+    end
 end
 
 """

stdlib/Profile/test/runtests.jl

@@ -170,7 +170,11 @@ let cmd = Base.julia_cmd()
     script = """
         using Profile
         f(::Val) = GC.safepoint()
-        @profile for i = 1:10^3; f(Val(i)); end
+        @profile for i = 1:10^3
+            println(i)
+            f(Val(i))
+        end
+        println("done")
         print(Profile.len_data())
         """
     p = open(`$cmd -e $script`)
@@ -184,7 +188,9 @@ let cmd = Base.julia_cmd()
     s = read(p, String)
     close(t)
     @test success(p)
-    @test parse(Int, s) > 100
+    @test !isempty(s)
+    @test occursin("done", s)
+    @test parse(Int, split(s, '\n')[end]) > 100
 end
 
 if Sys.isbsd() || Sys.islinux()

test/runtests.jl

@@ -124,6 +124,15 @@ cd(@__DIR__) do
         Distributed.remotecall_eval(Main, workers(), revise_init_expr)
     end
 
+    println("""
+        Running parallel tests with:
+          nworkers() = $(nworkers())
+          nthreads() = $(Threads.nthreads())
+          Sys.CPU_THREADS = $(Sys.CPU_THREADS)
+          Sys.total_memory() = $(Base.format_bytes(Sys.total_memory()))
+          Sys.free_memory() = $(Base.format_bytes(Sys.free_memory()))
+        """)
+
     #pretty print the information about gc and mem usage
     testgroupheader = "Test"
     workerheader = "(Worker)"