Use fewer gpu threads in shared mem reuse test
Use fewer gpu threads in shared mem reuse test

ronen/Halide,ronen/Halide,tdenniston/Halide,kgnk/Halide,kgnk/Halide,jiawen/Halide,tdenniston/Halide,psuriana/Halide,jiawen/Halide,psuriana/Halide,ronen/Halide,tdenniston/Halide,kgnk/Halide,kgnk/Halide,kgnk/Halide,jiawen/Halide,jiawen/Halide,psuriana/Halide,tdenniston/Halide,ronen/Halide,kgnk/Halide,jiawen/Halide,ronen/Halide,ronen/Halide,tdenniston/Halide,tdenniston/Halide,psuriana/Halide,kgnk/Halide,tdenniston/Halide,jiawen/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,tdenniston/Halide,jiawen/Halide