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| author | Avidan Borisov <avidanborisov@gmail.com> | 2023-06-26 12:16:35 +0300 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-10-17 18:33:27 -0400 |
| commit | c0da7f94b505a1a22b5ef346a6e5ecf3e0c32876 (patch) | |
| tree | e85229e19f422eeee6f6739b560136052921224b | |
| parent | 43bb4d25624556ae99d45ae26d36a92fd7ed350b (diff) | |
| download | trace-cmd-c0da7f94b505a1a22b5ef346a6e5ecf3e0c32876.tar.gz | |
trace-cmd record: Add --daemonize example to man page
Add a small usage example of how --daemonize can be used with guest/host tracing for analyzing network activity.
Link: https://lore.kernel.org/linux-trace-devel/20230626091635.3002827-5-avidanborisov@gmail.com
Signed-off-by: Avidan Borisov <avidanborisov@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
| -rw-r--r-- | Documentation/trace-cmd/trace-cmd-record.1.txt | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/trace-cmd/trace-cmd-record.1.txt b/Documentation/trace-cmd/trace-cmd-record.1.txt index 0c9a9147..79ab3d0c 100644 --- a/Documentation/trace-cmd/trace-cmd-record.1.txt +++ b/Documentation/trace-cmd/trace-cmd-record.1.txt @@ -515,6 +515,35 @@ task: sleep-21611 => try_to_wake_up (0xffffffff8106340a) ---- +An example of using --daemonize together with guest/host tracing: +[source,shell] +---- +$ sudo trace-cmd record --daemonize -p nop -e 'sched:sched_process_exec' -A guest -p nop -e net && +> ping -c 1 10.20.1.2 && +> sudo start-stop-daemon --stop --signal INT --retry 20 --pidfile /var/run/trace-cmd-record.pid && +> sudo trace-cmd report -i trace.dat -i trace-guest.dat | head +Negotiated kvm time sync protocol with guest guest +Send SIGINT to pid 3071371 to stop recording +PING 10.20.1.2 (10.20.1.2) 56(84) bytes of data. +64 bytes from 10.20.1.2: icmp_seq=1 ttl=64 time=0.134 ms +--- 10.20.1.2 ping statistics --- +1 packets transmitted, 1 received, 0% packet loss, time 0ms +rtt min/avg/max/mdev = 0.134/0.134/0.134/0.000 ms +CPU0 data recorded at offset=0x14f000 + 229 bytes in size (4096 uncompressed) +.... + trace.dat: cpus=28 +trace-guest.dat: cpus=1 + trace.dat: ping-3071450 [013] 1196830.834258: sched_process_exec: filename=/bin/ping pid=3071450 old_pid=3071450 +trace-guest.dat: <idle>-0 [000] 1196830.835990: napi_gro_receive_entry: dev=eth1 napi_id=0x2002 queue_mapping=1 skbaddr=0xffff95d051a5c400 vlan_tagged=0 vlan_proto=0x0000 vlan_tci=0x0000 protocol=0x0800 ip_summed=0 hash=0x00000000 l4_hash=0 len=84 data_len=0 truesize=768 mac_header_valid=1 mac_header=-14 nr_frags=0 gso_size=0 gso_type=0 +trace-guest.dat: <idle>-0 [000] 1196830.835997: napi_gro_receive_exit: ret=3 +trace-guest.dat: <idle>-0 [000] 1196830.835998: netif_receive_skb: dev=eth1 skbaddr=0xffff95d051a5c400x len=84 +trace-guest.dat: <idle>-0 [000] 1196830.836021: net_dev_queue: dev=eth1 skbaddr=0xffff95d051a5c700x len=98 +trace-guest.dat: <idle>-0 [000] 1196830.836024: net_dev_start_xmit: dev=eth1 queue_mapping=0 skbaddr=0xffff95d051a5c700 vlan_tagged=0 vlan_proto=0x0000 vlan_tci=0x0000 protocol=0x0800 ip_summed=0 len=98 data_len=0 network_offset=14 transport_offset_valid=1 transport_offset=34 tx_flags=0 gso_size=0 gso_segs=0 gso_type=0 +trace-guest.dat: <idle>-0 [000] 1196830.836069: net_dev_xmit: dev=eth1 skbaddr=0xffff95d051a5c700 len=98 rc=0 + trace.dat: sudo-3071451 [015] 1196830.838262: sched_process_exec: filename=/usr/bin/sudo pid=3071451 old_pid=3071451 +---- + SEE ALSO -------- trace-cmd(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), |