about summary refs log tree commit diff
path: root/tests/parallel.sh
blob: 13349e875f113a44bf2f355e450c2d6d0302c155 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
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)

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