Question about git-cherry and the rev list it's using

Hello,

I'm using "git cherry old master base" to see if all commits between master and base have been applied in my 'old' branch.

So I expect that git cherry is using a list of commits given by : "git rev-list --no-merges base..master".

But it looks like it's not the case:

  $ git rev-list --no-merges --oneline base..master | wc -l
  22

  $ git cherry old master base | wc -l
  12

Could anybody help me on this because I don't understand the results I have ?

Thanks