Hi,
Based on the "Doubling Performance in Swift with No Code Changes" talk
at the Openstack Summit, I decided to give running Swift on PyPy a
shot. I configured a VM with Swift (largely based on the steps
mentioned in [1], although I did have to change a few things). Swift
was up and running. The /info endpoint showed the correct output.
However, when I tried to do a simple HEAD request to get all the
containers, I got the following warning. I did export PYPY_GC_MIN=15M
before starting the swift services.
May 5 00:35:59 shri-swift-tests swift-proxy-server: STDOUT:
/home/blah/pypy/lib-python/2.7/SocketServer.py:717:
RefCountingWarning: 'GreenSocket' object has no _reuse/_drop
methods#012{{#012 You make use (or a library you are using makes
use) of the internal#012 classes '_socketobject' and '_fileobject'
in socket.py, initializing#012 them with custom objects. On PyPy,
these custom objects need two#012 extra methods, _reuse() and
_drop(), that maintain an explicit#012 reference counter. When
_drop() has been called as many times as#012 _reuse(), then the
object should be freed.#012#012 Without these methods, you get the
warning here. This is to#012 prevent the following situation: if
your (or the library's) code#012 relies on reference counting for
prompt closing, then on PyPy, the#012 __del__ method will be called
later than on CPython. You can#012 easily end up in a situation
where you open and close a lot of#012 (high-level) '_socketobject'
or '_fileobject', but the (low-level)#012 custom objects will
accumulate before their __del__ are called.#012 You quickly risk
running out of file descriptors, for example.#012}}#012
self.rfile.close() (txn: txae85f55c9d3d4f26b96a5-00572a956f)
Any ideas how to get over this? What are the consequences of this?
Thanks in advance.
-Shri
[1] https://01.org/lp/documentation/pypy-enabling-guide-openstack-swift
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