Re: [PATCH kdevops] fstests: provide kconfig guidance for SOAK_DURATION

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On Thu, Jan 25, 2024 at 11:24:58PM +0000, Matthew Wilcox wrote:
> On Thu, Jan 25, 2024 at 02:10:37PM -0800, Luis Chamberlain wrote:
> > The kdevops test runner has supported a custom SOAK_DURATION for
> > fstests, however we were not providing any guidance. This means folks
> > likely disable this. Throw a bone and provide some basic guidance and
> > use 2.5 hours as the default value. There are about 46 tests today
> > which use soak duration, this means if you are testing serially it
> > increase total test time by about 5 days than the previously known
> > total test time.
> 
> Do you have any stats on how much more effective it is to soak for 1
> hour vs 5 hours vs 24 hours?

Heh no, we just went for the high value of 2.5 hours for our LBS
testing. Note that the soaking is *per* test and hence the summation
of *all* 46 tests need to be considered. Unless of course we run 46
guests all running each respective soak test separately.

> Presumably there's some kind of
> exponential dropoff, like 20 bugs found at 1 hour, an extra five found
> by four hours and three more at 24 hours?

I suspect you might be right. We *may* be able to experiment more with
this once resource scaling can be done automatically for us, ie with
something like k8.

  Luis




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