I found that Caching Tool does nothing for applications attached by cherrypy.tree.gfaft (in CherryPy 3.1.2).

When log.screen configuration is True, CherryPy usually emits log to standard output. It's like:

127.0.0.1 - - [13/Apr/2011:16:58:19] "GET /memo HTTP/1.1" 200 6977 "http://127.0.0.1:8080/" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.18) Gecko/20110324 Iceweasel/3.5.18 (like Firefox/3.5.18)"
127.0.0.1 - - [13/Apr/2011:16:58:19] "GET /css/main.css HTTP/1.1" 304 - "http://127.0.0.1:8080/memo" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.18) Gecko/20110324 Iceweasel/3.5.18 (like Firefox/3.5.18)"
127.0.0.1 - - [13/Apr/2011:16:58:19] "GET /static/gniibe-logo.png HTTP/1.1" 304 - "http://127.0.0.1:8080/memo" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.18) Gecko/20110324 Iceweasel/3.5.18 (like Firefox/3.5.18)"

But it doesn't emit this kind of log for WSGI app.