diff options
| author | Juha-Matti Tilli <juha-matti.tilli@iki.fi> | 2017-12-23 11:58:32 +0200 |
|---|---|---|
| committer | Maxim Uvarov <maxim.uvarov@linaro.org> | 2018-01-24 16:36:26 +0300 |
| commit | 91b127d61530bcf0e8c5399b3d4117ef2389ca12 (patch) | |
| tree | 41bc7c8983ee4c0d0493226ce189b0f11e876342 /example | |
| parent | b122176ee59494dd957f0f5ff41d4b55a1477e13 (diff) | |
linux-generic: pktio: add null pktio support
Sometimes, you may wish to run an application by using a dummy interface
that never receives any packets and that discards transmitted packets.
This is possible with non-looping pcap pktio with no input and output
pcaps. So, the pktio would be just "pcap:". However, you cannot have two
pktios named "pcap:" because there is code to check if the pktio is
already opened. Also, the pcap pktio requires that ODP is compiled with
the pcap library, which it may not be. Also, pcap is always
single-queue and therefore not suitable for modern multi-queue
applications.
Also, recently a patch was provided to ODP to allow interruptible sleep
when receiving packets. This, however, does not work with mixed pcap and
socket/netmap pktio types.
To fix these issues, a new "null" pktio is introduced. It is used by
specifying the interface name to be "null:0", "null:1", or similar. All
packets sent to the null pktio are discarded and no packets are
received. The null pktio fully supports the interruptible sleep
infrastructure, meaning applications can have 0% idle CPU load when one
interface is a null interface and another interface is socket or netmap.
Signed-off-by: Juha-Matti Tilli <juha-matti.tilli@iki.fi>
Reviewed-by: Bill Fischofer <bill.fischofer@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Diffstat (limited to 'example')
| -rw-r--r-- | example/generator/Makefile.am | 5 | ||||
| -rwxr-xr-x | example/generator/generator_run.sh | 17 | ||||
| -rwxr-xr-x | example/l2fwd_simple/l2fwd_simple_run.sh | 13 |
3 files changed, 35 insertions, 0 deletions
diff --git a/example/generator/Makefile.am b/example/generator/Makefile.am index 7deeef406..63f4ae608 100644 --- a/example/generator/Makefile.am +++ b/example/generator/Makefile.am @@ -3,3 +3,8 @@ include $(top_srcdir)/example/Makefile.inc bin_PROGRAMS = odp_generator odp_generator_SOURCES = odp_generator.c + +if test_example +TESTS = generator_run.sh +endif +EXTRA_DIST = generator_run.sh diff --git a/example/generator/generator_run.sh b/example/generator/generator_run.sh new file mode 100755 index 000000000..2d741a8d1 --- /dev/null +++ b/example/generator/generator_run.sh @@ -0,0 +1,17 @@ +#!/bin/bash +# +# Copyright (c) 2018, Linaro Limited +# All rights reserved. +# +# SPDX-License-Identifier: BSD-3-Clause +# + +./odp_generator${EXEEXT} -w 1 -n 1 -I null:0 -m u +STATUS=$? + +if [ "$STATUS" -ne 0 ]; then + echo "Error: status was: $STATUS, expected 0" + exit 1 +fi + +exit 0 diff --git a/example/l2fwd_simple/l2fwd_simple_run.sh b/example/l2fwd_simple/l2fwd_simple_run.sh index 089d9f97d..d09bd3cfe 100755 --- a/example/l2fwd_simple/l2fwd_simple_run.sh +++ b/example/l2fwd_simple/l2fwd_simple_run.sh @@ -29,4 +29,17 @@ fi rm -f pcapout.pcap +./odp_l2fwd_simple${EXEEXT} null:0 null:1 \ + 02:00:00:00:00:01 02:00:00:00:00:02 & + +sleep 1 +kill -s SIGINT $! +wait $! +STATUS=$? + +if [ "$STATUS" -ne 255 ]; then + echo "Error: status was: $STATUS, expected 255" + exit 1 +fi + exit 0 |