I got Brendan's flamegraphs to work without any changes on the rex fedora dev nodes. See http://ceph.com/sage/foo.svg This is about 10 seconds of a rados bench on a vstart cluster, so nothing fancy. It's a pretty easy way to visualize where the time is spent, though. A few things I noticed: - lots of time in DBObjectMap::set_keys (2%). a surprising amount (>1%) in setxattr (kernel), too. Hopefully NewStore can do better here. - the ReplicatedPG::do_request view is interesting, too.. not surprisingly a fair bit of time spent with the PG logs. - 1% spend on writing pg info and log (PG::write_if_dirty). most of that in encode sage -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
