testsuite/bench: Tweaked tests to run longer

Tweaked parameters so that shorter tests run for longer, typically 2-3
seconds each. This is to reduce sensitivity to potential disturbance
of results by small events during startup e.g. slow system calls.

testsuite/bench/PARAM_x86_CI.txt

@@ -1,22 +1,21 @@
-array3d 300
+array3d 500
 binary-trees 16
 chameneos 1e7
-coroutine-ring 2e7
+coroutine-ring 5e7
 euler14-bit 2e7
 fannkuch 11
 fasta 5e6
 life
 mandelbrot 5000
 mandelbrot-bit 5000
-md5 20000
-nbody 5e6
+md5 30000
+nbody 8e6
 nsieve 12
-nsieve-bit 12
+nsieve-bit 13
 nsieve-bit-fp 12
-partialsums 1e7
+partialsums 3e7
 pidigits-nogmp 5000
 ray 9
-recursive-ack 10
 recursive-fib 40
 scimark-fft 50000
 scimark-lu 5000

testsuite/bench/life.lua

@@ -103,7 +103,7 @@ function LIFE(w,h)
     thisgen:draw()
     write("Life - generation ",gen,"\n")
     gen=gen+1
-    if gen>2000 then break end
+    if gen>10000 then break end
     --delay()		-- no delay
   end
 end

testsuite/bench/roulette.lua

@@ -6,7 +6,7 @@
 -- (Let the test harness determine the random seed)
 -- math.randomseed(os.time())
 
-local population = 100e6
+local population = 200e6
 local live = 0
 local die  = 0