source common.sh # First, test that -jN performs builds in parallel. echo "testing nix-build -j..." clearStore rm -f $SHARED.cur $SHARED.max outPath=$(nix-build -j10000 parallel.nix --no-out-link) echo "output path is $outPath" text=$(cat "$outPath") if test "$text" != "abacade"; then exit 1; fi if test "$(cat $SHARED.cur)" != 0; then fail "wrong current process count"; fi if test "$(cat $SHARED.max)" != 3; then fail "not enough parallelism"; fi # Second, test that parallel invocations of nix-build perform builds # in parallel, and don't block waiting on locks held by the others. echo "testing multiple nix-build -j1..." clearStore rm -f $SHARED.cur $SHARED.max drvPath=$(nix-instantiate parallel.nix --argstr sleepTime 15) cmd="nix-store -j1 -r $drvPath" $cmd & pid1=$! echo "pid 1 is $pid1" $cmd & pid2=$! echo "pid 2 is $pid2" $cmd & pid3=$! echo "pid 3 is $pid3" $cmd & pid4=$! echo "pid 4 is $pid4" wait $pid1 || fail "instance 1 failed: $?" wait $pid2 || fail "instance 2 failed: $?" wait $pid3 || fail "instance 3 failed: $?" wait $pid4 || fail "instance 4 failed: $?" if test "$(cat $SHARED.cur)" != 0; then fail "wrong current process count"; fi if test "$(cat $SHARED.max)" != 3; then fail "not enough parallelism"; fi