Re: [PATCH] rhashtable-test: extend to test concurrency

From: Thomas Graf
Date: Sun Aug 16 2015 - 11:02:54 EST


On 08/15/15 at 12:37am, Phil Sutter wrote:
> After having tested insertion, lookup, table walk and removal, spawn a
> number of threads running operations on the same rhashtable. Each of
> them will:
>
> 1) insert it's own set of objects,
> 2) lookup every successfully inserted object and finally
> 3) remove objects in several rounds until all of them have been removed,
> making sure the remaining ones are still found after each round.
>
> This should put a good amount of load onto the system and due to
> synchronising thread startup via two semaphores also extensive
> concurrent table access.
>
> The default number of ten threads returned within half a second on my
> local VM with two cores. Running 200 threads took about four seconds. If
> slow systems suffer too much from this though, the default could be
> lowered or even set to zero so this extended test does not run at all by
> default.
>
> Signed-off-by: Phil Sutter <phil@xxxxxx>

Looks great. A default of 10 makes sense as well. Thanks a lot!

Acked-by: Thomas Graf <tgraf@xxxxxxx>
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