Hi Geert,
On Mon, Oct 24, 2016 at 02:11:32PM +0200, Geert Uytterhoeven wrote:
On m68k/ARAnyM, test_rhashtable fails with:
Test failed: thread 0 returned: -4
(-4 = -EINTR)
How reproducible is this? I wonder why out of the ten threads only the
first one fails.
I traced this back to your commit f4a3e90ba5739cfd ("rhashtable-test: extend
to test concurrency"), which added that part of the test.
Diff of the test output between the failing commit and its parent:
Running rhashtable test nelem=8, max_size=65536, shrinking=0
Test 00:
Adding 50000 keys
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Deleting 50000 keys
- Duration of test: 1029960000 ns
+ Duration of test: 990000000 ns
Test 01:
Adding 50000 keys
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Deleting 50000 keys
- Duration of test: 990000000 ns
+ Duration of test: 720000000 ns
Test 02:
Adding 50000 keys
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Deleting 50000 keys
- Duration of test: 1130000000 ns
+ Duration of test: 700000000 ns
Test 03:
Adding 50000 keys
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Traversal complete: counted=50000, nelems=50000, entries=50000, table-jumps=0
Deleting 50000 keys
- Duration of test: 1080000000 ns
-Average test time: 1057490000
+ Duration of test: 700000000 ns
+Average test time: 777500000
+Testing concurrent rhashtable access from 10 threads
+Test failed: thread 0 returned: -4
+Started 10 threads, 1 failed
Do you have any clue?
Not really, I merely implemented the test.
Thanks, Phil
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