feature request: allow float for process count

[jjb]

In my environment, the number of cpus on a container is available in an environment variable, CONTAINER_CPU_SHARE.

I would like to pass this to SIDEKIQ_COUNT

problem is, it can be a "half cpu", e.g. "2.5"

Maybe sidekiq could accept this and round up, with something like .to_f.ceil?

I would vote for rounding up, to take full advantage of the half cpu. This is on the side of slightly higher memory use, but my uninformed guess is most users who are passing in a value would be savvy enough to be okay with that.

@count = Integer(env["SIDEKIQ_COUNT"].to_f.ceil || Etc.nprocessors)

[mperham]

-        @count = Integer(env["SIDEKIQ_COUNT"] || Etc.nprocessors)
+        @count = Float(env["SIDEKIQ_COUNT"] || Etc.nprocessors).round

This will round to the nearest integer: 2.4 -> 2 and 2.5 -> 3. wdyt?

[jjb]

i like it

pros:

• simple reliable implementation
• in my personal use case, it's always .5, so it works
• my uninformed guess is most partial cpus are .5

cons:

• i would want .4 to still be rounded up, maybe most others would as well