Add tests that running under perf works

Author: Zentrik

test/ExecutionTests.jl

@@ -3,6 +3,7 @@ module ExecutionTests
 using BenchmarkTools
 using Profile
 using Test
+using LinuxPerf
 
 seteq(a, b) = length(a) == length(b) == length(intersect(a, b))
 
@@ -382,4 +383,34 @@ b = x = nothing
 GC.gc()
 @test x_finalized
 
+##################################
+# Linux Perf Integration #
+##################################
+
+b = @benchmarkable sin($(Ref(42.0))[])
+results = run(b; seconds=1, enable_linux_perf=false)
+@test results.linux_perf_stats === nothing
+
+b = @benchmarkable sin($(Ref(42.0))[])
+results = run(b; seconds=1)
+@test results.linux_perf_stats === nothing
+
+b = @benchmarkable sin($(Ref(42.0))[])
+results = run(b; seconds=1, enable_linux_perf=true, evals=10^3)
+@test results.linux_perf_stats !== nothing
+@test any(results.linux_perf_stats.threads) do thread
+    instructions = LinuxPerf.scaledcount(thread["instructions"])
+    !isnan(instructions) && instructions > 10^4
+end
+
+tune!(groups)
+results = run(groups; enable_linux_perf=true)
+for (name, group_results) in BenchmarkTools.leaves(results)
+    @test group_results.linux_perf_stats !== nothing
+    @test any(group_results.linux_perf_stats.threads) do thread
+        instructions = LinuxPerf.scaledcount(thread["instructions"])
+        !isnan(instructions) && instructions > 10^3
+    end
+end
+
 end # module