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-# Handoff queue demo plugin {#handoff_queue_demo_plugin}
-
-This plugin provides a simplified example of how to hand off
-packets between threads. I used it to debug packet-tracer handoff
-tracing support.
-
-# Packet generator input script
-
-```
- packet-generator new {
- name x
- limit 5
- size 128-128
- interface local0
- node handoffdemo-1
- data {
- incrementing 30
- }
- }
-```
-# Start vpp with 2 worker threads
-
-The demo plugin hands packets from worker 1 to worker 2.
-
-# Enable tracing, and start the packet generator
-
-```
- trace add pg-input 100
- packet-generator enable
-```
-
-# Sample Run
-
-```
- DBGvpp# ex /tmp/pg_input_script
- DBGvpp# pa en
- DBGvpp# sh err
- Count Node Reason
- 5 handoffdemo-1 packets handed off processed
- 5 handoffdemo-2 completed packets
- DBGvpp# show run
- Thread 1 vpp_wk_0 (lcore 0)
- Time 133.9, average vectors/node 5.00, last 128 main loops 0.00 per node 0.00
- vector rates in 3.7331e-2, out 0.0000e0, drop 0.0000e0, punt 0.0000e0
- Name State Calls Vectors Suspends Clocks Vectors/Call
- handoffdemo-1 active 1 5 0 4.76e3 5.00
- pg-input disabled 2 5 0 5.58e4 2.50
- unix-epoll-input polling 22760 0 0 2.14e7 0.00
- ---------------
- Thread 2 vpp_wk_1 (lcore 2)
- Time 133.9, average vectors/node 5.00, last 128 main loops 0.00 per node 0.00
- vector rates in 0.0000e0, out 0.0000e0, drop 3.7331e-2, punt 0.0000e0
- Name State Calls Vectors Suspends Clocks Vectors/Call
- drop active 1 5 0 1.35e4 5.00
- error-drop active 1 5 0 2.52e4 5.00
- handoffdemo-2 active 1 5 0 2.56e4 5.00
- unix-epoll-input polling 22406 0 0 2.18e7 0.00
-```
-
-Enable the packet tracer and run it again...
-
-```
- DBGvpp# trace add pg-input 100
- DBGvpp# pa en
- DBGvpp# sh trace
- sh trace
- ------------------- Start of thread 0 vpp_main -------------------
- No packets in trace buffer
- ------------------- Start of thread 1 vpp_wk_0 -------------------
- Packet 1
-
- 00:06:50:520688: pg-input
- stream x, 128 bytes, 0 sw_if_index
- current data 0, length 128, buffer-pool 0, ref-count 1, trace handle 0x1000000
- 00000000: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d0000
- 00000020: 0000000000000000000000000000000000000000000000000000000000000000
- 00000040: 0000000000000000000000000000000000000000000000000000000000000000
- 00000060: 0000000000000000000000000000000000000000000000000000000000000000
- 00:06:50:520762: handoffdemo-1
- HANDOFFDEMO: current thread 1
-
- Packet 2
-
- 00:06:50:520688: pg-input
- stream x, 128 bytes, 0 sw_if_index
- current data 0, length 128, buffer-pool 0, ref-count 1, trace handle 0x1000001
- 00000000: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d0000
- 00000020: 0000000000000000000000000000000000000000000000000000000000000000
- 00000040: 0000000000000000000000000000000000000000000000000000000000000000
- 00000060: 0000000000000000000000000000000000000000000000000000000000000000
- 00:06:50:520762: handoffdemo-1
- HANDOFFDEMO: current thread 1
-
- Packet 3
-
- 00:06:50:520688: pg-input
- stream x, 128 bytes, 0 sw_if_index
- current data 0, length 128, buffer-pool 0, ref-count 1, trace handle 0x1000002
- 00000000: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d0000
- 00000020: 0000000000000000000000000000000000000000000000000000000000000000
- 00000040: 0000000000000000000000000000000000000000000000000000000000000000
- 00000060: 0000000000000000000000000000000000000000000000000000000000000000
- 00:06:50:520762: handoffdemo-1
- HANDOFFDEMO: current thread 1
-
- Packet 4
-
- 00:06:50:520688: pg-input
- stream x, 128 bytes, 0 sw_if_index
- current data 0, length 128, buffer-pool 0, ref-count 1, trace handle 0x1000003
- 00000000: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d0000
- 00000020: 0000000000000000000000000000000000000000000000000000000000000000
- 00000040: 0000000000000000000000000000000000000000000000000000000000000000
- 00000060: 0000000000000000000000000000000000000000000000000000000000000000
- 00:06:50:520762: handoffdemo-1
- HANDOFFDEMO: current thread 1
-
- Packet 5
-
- 00:06:50:520688: pg-input
- stream x, 128 bytes, 0 sw_if_index
- current data 0, length 128, buffer-pool 0, ref-count 1, trace handle 0x1000004
- 00000000: 000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d0000
- 00000020: 0000000000000000000000000000000000000000000000000000000000000000
- 00000040: 0000000000000000000000000000000000000000000000000000000000000000
- 00000060: 0000000000000000000000000000000000000000000000000000000000000000
- 00:06:50:520762: handoffdemo-1
- HANDOFFDEMO: current thread 1
-
- ------------------- Start of thread 2 vpp_wk_1 -------------------
- Packet 1
-
- 00:06:50:520796: handoff_trace
- HANDED-OFF: from thread 1 trace index 0
- 00:06:50:520796: handoffdemo-2
- HANDOFFDEMO: current thread 2
- 00:06:50:520867: error-drop
- rx:local0
- 00:06:50:520914: drop
- handoffdemo-2: completed packets
-
- Packet 2
-
- 00:06:50:520796: handoff_trace
- HANDED-OFF: from thread 1 trace index 1
- 00:06:50:520796: handoffdemo-2
- HANDOFFDEMO: current thread 2
- 00:06:50:520867: error-drop
- rx:local0
- 00:06:50:520914: drop
- handoffdemo-2: completed packets
-
- Packet 3
-
- 00:06:50:520796: handoff_trace
- HANDED-OFF: from thread 1 trace index 2
- 00:06:50:520796: handoffdemo-2
- HANDOFFDEMO: current thread 2
- 00:06:50:520867: error-drop
- rx:local0
- 00:06:50:520914: drop
- handoffdemo-2: completed packets
-
- Packet 4
-
- 00:06:50:520796: handoff_trace
- HANDED-OFF: from thread 1 trace index 3
- 00:06:50:520796: handoffdemo-2
- HANDOFFDEMO: current thread 2
- 00:06:50:520867: error-drop
- rx:local0
- 00:06:50:520914: drop
- handoffdemo-2: completed packets
-
- Packet 5
-
- 00:06:50:520796: handoff_trace
- HANDED-OFF: from thread 1 trace index 4
- 00:06:50:520796: handoffdemo-2
- HANDOFFDEMO: current thread 2
- 00:06:50:520867: error-drop
- rx:local0
- 00:06:50:520914: drop
- handoffdemo-2: completed packets
- DBGvpp#
-```