[PATCH] eventdev/timer: fix overflow issue

[Stephen Hemminger]

On Tue, 24 Jan 2023 10:09:45 -0600
Erik Gabriel Carrillo <erik.g.carrillo at intel.com> wrote:

> The software timer adapter converts event timer timeout ticks to a
> number of CPU cycles at which an rte_timer should expire. The
> computation uses integer operations that can result in overflow.
> 
> Use floating point operations instead to perform the computation, and
> convert the final result back to an integer type when returning. Also
> move the logic that checks the timeout range into the function that
> performs the above computation.
> 
> Fixes: 6750b21bd6af ("eventdev: add default software timer adapter")
> Cc: stable at dpdk.org

Don't like this solution.
Floating point is slow and inaccurate.
You can do it with fixed point math if you are careful.