[Swift-devel] Swift crashing for runs with 1M calls

[Yadu Nand]

Hi,

I'm trying to see swift behavior with some stress on and I see crashes at
close to 1M calls/loops.

Here's one such case  ( x_func.swift code is here ->
https://github.com/yadudoc/swift-basics/blob/master/stress/x_func.swift):
Test run with 0.94 ( corei5 with 8Gb ram)

yadu at Miranda:~/src/swift-basics/stress$ time swift x_func.swift
-loops=1000000
Swift 0.94RC3 swift-r6268 cog-r3605

RunID: 20130302-0019-l2alv5d2
Progress:  time: Sat, 02 Mar 2013 00:19:38 +0530
Fibonacci[2]   = 1
No events in 10s.
Progress:  time: Sat, 02 Mar 2013 00:20:08 +0530
Progress:  time: Sat, 02 Mar 2013 00:20:38 +0530
Progress:  time: Sat, 02 Mar 2013 00:21:08 +0530
Progress:  time: Sat, 02 Mar 2013 00:21:38 +0530
Progress:  time: Sat, 02 Mar 2013 00:22:08 +0530
Progress:  time: Sat, 02 Mar 2013 00:22:38 +0530
Progress:  time: Sat, 02 Mar 2013 00:23:08 +0530
Finding dependency loops...Exception in thread "Hang checker"
java.lang.StackOverflowError
at java.util.HashMap.put(HashMap.java:484)
 at java.util.HashSet.add(HashSet.java:217)
at org.griphyn.vdl.karajan.HangChecker.findLoop(HangChecker.java:299)
 at org.griphyn.vdl.karajan.HangChecker.findLoop(HangChecker.java:303)

Earlier I had posted about iterate failing to compile on 0.94. I ran a few
tests on 0.93
(code :
https://github.com/yadudoc/swift-basics/blob/master/stress/x_iterate.swift)
with
results:
100K loops -> 17s real
1M loops -> No response for a while, then java.lang.OutOfMemory exception
thrown.

I'm finding it difficult to keep stats so, I'm placing the stats and as
much run info as
possible in comments in the scripts themselves. All the scripts are here ->
https://github.com/yadudoc/swift-basics/tree/master/stress


-Yadu
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