Messages in this thread | | | Date | Mon, 2 Nov 2015 22:34:01 +0300 | Subject | Re: [lkp] [fs] df4c0e36f1: NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [swapper/0:1] | From | Andrey Ryabinin <> |
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2015-11-02 20:39 GMT+03:00 Dave Hansen <dave.hansen@intel.com>: > On 11/02/2015 01:32 AM, Andrey Ryabinin wrote: >> And the major factor here is number 2. >> >> In your dmesg: >> [ 67.891156] rbtree testing -> 570841 cycles >> [ 88.609636] augmented rbtree testing >> [ 116.546697] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! >> [swapper/0:1] >> >> >> I've tried to reproduce this, and got this: >> [ 0.693574] rbtree testing -> 15513 cycles >> 570841/15513 = 36x times faster. >> >> [ 1.159450] augmented rbtree testing -> 23675 cycles >> [ 1.864996] >> It took less than a second, meanwhile in your case it didn't finish in >> 22 seconds. >> >> This makes me think that your host is overloaded and the problem is on >> your side. > > It's probably just a matter of putting some cond_resched()s in the test > code.
Yes, but is it worthwhile? It's very likely that lockup will just trigger in another place.
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