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* Test case (currently fails): multiple Nix builds shouldn't block

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waiting on the same lock when there are other builds that can be
  done.
This commit is contained in:
Eelco Dolstra 2009-03-22 23:16:18 +00:00
parent 7a57b2920b
commit d7b2d11255
1 changed files with 34 additions and 2 deletions
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36
tests/parallel.sh
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@ -1,7 +1,12 @@
source common.sh
# First, test that -jN performs builds in parallel.
echo "testing nix-build -j..."
clearStore
rm -f $SHARED.cur $SHARED.max
outPath=$($nixbuild -j10000 parallel.nix)
echo "output path is $outPath"
@ -9,5 +14,32 @@ echo "output path is $outPath"
text=$(cat "$outPath")
if test "$text" != "abacade"; then exit 1; fi
if test "$(cat $SHARED.cur)" != 0; then exit 1; fi
if test "$(cat $SHARED.max)" != 3; then exit 1; fi
if test "$(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
$nixbuild -j1 parallel.nix &
pid1=$!
echo "pid 1 is $pid1"
$nixbuild -j1 parallel.nix &
pid2=$!
echo "pid 2 is $pid2"
$nixbuild -j1 parallel.nix &
pid3=$!
echo "pid 3 is $pid3"
wait $pid1
wait $pid2
wait $pid3
if test "$(cat $SHARED.cur)" != 0; then fail "wrong current process count"; fi
if test "$(cat $SHARED.max)" != 3; then fail "not enough parallelism"; fi