Hi,
this short series of patches aims to increase the rate at which
ovs-vswtichd can receive frames. It targets sset creation and deletion
which showed up when using perf for profiling.
For a configuration with a single match-all flow with actions=drop this
patchset improves the rate at which frames may be received from ~23kkps to
~27kpps (~17%).
sset creation and deletion, seems expensive for three reasons:
1. Malloc and free used for each (small) block of data (perf analysis)
2. Hash calculation (perf analysis)
3. The use of a non-cache-friendly data structure (guess)
With this series applied there still seems to be noticeable overhead
in reading sset. And I wonder if in some cases an alternate data structure
may be useful. For instance in my configuration the result of
ofproto_enumerate_types() seems to be an sset containing only two elements.
I suspect a simple array traversal would be faster than the hash and
cache-miss overhead of sset.
Git and diffstat information provided to aid review.
----------------------------------------------------------------
The following changes since commit 2c11563ad2967db7e5131f763c4d1107919b901e:
debian: Change openvswitch restart logic for kernel package. (2013-01-17
13:34:39 -0800)
are available in the git repository at:
git://github.com/horms/openvswitch.git devel/sset
for you to fetch changes up to d40f93e9000b1c789c51fa9cf521f04871f99286:
ofproto: Cache result in ofproto_enumerate_types (2013-01-21 14:58:59 +0900)
----------------------------------------------------------------
Simon Horman (3):
netdev-linux: Cache result in netdev_linux_miimon_run()
ofproto: Cache result in dp_enumerate_type
ofproto: Cache result in ofproto_enumerate_types
lib/dpif-netdev.c | 7 ++-----
lib/dpif.c | 16 ++++++++++------
lib/dpif.h | 2 +-
lib/netdev-linux.c | 25 +++++++++----------------
lib/netdev-provider.h | 3 +--
lib/netdev.c | 22 ++++++++++++++++++----
ofproto/ofproto-dpif.c | 6 +++---
ofproto/ofproto-provider.h | 6 ++----
ofproto/ofproto.c | 31 +++++++++++++++++++++----------
ofproto/ofproto.h | 3 ++-
utilities/ovs-dpctl.c | 25 ++++++++-----------------
vswitchd/bridge.c | 32 ++++++++++++--------------------
12 files changed, 89 insertions(+), 89 deletions(-)
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