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ip route uses ll_name_to_index and ll_index_to_name to convert between device names and indices. At the moment both use for the ioctl based glibc functions if_nametoindex and if_indextoname and does not cache the result. When using a batch file or dumping large number of routes this means the same device lookups can be done repeatedly adding unnecessary overhead (socket + ioctl + close for each device lookup). Add a new function, ll_link_get, to send a netlink based RTM_GETLINK. If successful, cache the result in idx_head and name_head so future lookups can re-use the entry. Update ll_name_to_index and ll_index_to_name to use ll_link_get and only fallback to the glibc functions if it fails. With this change the time to install 720,022 routes with 2 ecmp nexthops where the nexthop device is given is reduced from 31.4 seconds to 19.2 seconds. A dump of those routes drops from 13.3 to 2.8 seconds. Signed-off-by: David Ahern <dsahern@gmail.com> |
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|---|---|---|
| bash-completion | ||
| bridge | ||
| devlink | ||
| doc/actions | ||
| etc/iproute2 | ||
| examples | ||
| genl | ||
| include | ||
| ip | ||
| lib | ||
| man | ||
| misc | ||
| netem | ||
| rdma | ||
| schema | ||
| tc | ||
| testsuite | ||
| tipc | ||
| .clang-format | ||
| .gitignore | ||
| configure | ||
| COPYING | ||
| Makefile | ||
| README | ||
| README.devel | ||
| README.distribution | ||
| README.iproute2+tc | ||
| README.lnstat | ||
This is a set of utilities for Linux networking.
Information:
https://wiki.linuxfoundation.org/networking/iproute2
Download:
http://www.kernel.org/pub/linux/utils/net/iproute2/
Stable version repository:
git://git.kernel.org/pub/scm/network/iproute2/iproute2.git
Development repository:
git://git.kernel.org/pub/scm/network/iproute2/iproute2-next.git
How to compile this.
--------------------
1. libdbm
arpd needs to have the berkeleydb development libraries. For Debian
users this is the package with a name like libdbX.X-dev.
DBM_INCLUDE points to the directory with db_185.h which
is the include file used by arpd to get to the old format Berkeley
database routines. Often this is in the db-devel package.
2. make
The makefile will automatically build a config.mk file which
contains definitions of libraries that may or may not be available
on the system such as: ATM, ELF, MNL, and SELINUX.
3. To make documentation, cd to doc/ directory , then
look at start of Makefile and set correct values for
PAGESIZE=a4 , ie: a4 , letter ... (string)
PAGESPERPAGE=2 , ie: 1 , 2 ... (numeric)
and make there. It assumes, that latex, dvips and psnup
are in your path.
4. This package includes matching sanitized kernel headers because
the build environment may not have up to date versions. See Makefile
if you have special requirements and need to point at different
kernel include files.
Stephen Hemminger
stephen@networkplumber.org
Alexey Kuznetsov
kuznet@ms2.inr.ac.ru