Messages in this thread | | | Subject | [PATCH trace-cmd V6 0/7] trce-cmd: add virtual machine tracing | From | Masami Hiramatsu <> | Date | Tue, 26 May 2015 15:55:22 +0900 |
| |
Hi,
This is the version 6 series of virtio-trace for trace-cmd. The previous series is here; https://lkml.org/lkml/2014/12/22/79
I took over this work from Yoshihiro Yunomae. This version updates previous patch on the latest trace-cmd tree and recover Yoshihiro's signed-off and original authorship.
How to use ========== 1. Run virt-server on a host # trace-cmd virt-server --dom guest1 -c 2
2. Set up of virtio-serial pipe of guest1 on the host Add the following tags to domain XML files. # virsh edit guest1 <channel type='unix'> <source mode='connect' path='/tmp/trace-cmd/virt/agent-ctl-path'/> <target type='virtio' name='agent-ctl-path'/> </channel> <channel type='pipe'> <source path='/tmp/trace-cmd/virt/guest1/trace-path-cpu0'/> <target type='virtio' name='trace-path-cpu0'/> </channel> <channel type='pipe'> <source path='/tmp/trace-cmd/virt/guest1/trace-path-cpu1'/> <target type='virtio' name='trace-path-cpu1'/> </channel>
3. Boot the guest # virsh start guest1
4. Run the guest1's client(see trace-cmd-record(1) with the *--virt* option) # trace-cmd record -e sched* --virt
If you want to boot another guest sends trace-data via virtio-serial, you will manually make the guest domain directory and trace data I/Fs.
- Make guest domain directory on the host # mkdir -p /tmp/trace-cmd/virt/<DOMAIN> # chmod 710 /tmp/trace-cmd/virt/<DOMAIN> # chgrp qemu /tmp/trace-cmd/virt/<DOMAIN>
- Make FIFO on the host # mkfifo /tmp/trace-cmd/virt/<DOMAIN>/trace-path-cpu{0,1,...,X}.{in,out}
TODO ==== - Don't use fixed directory and fifos. Make it flexible. - Don't depend on the libvirt. We can find fifos in /proc/<pid>/fd/*. - Cleanup the code. It is not well structured now.
Thank you,
---
Yoshihiro YUNOMAE (7): trace-cmd: Support -N option for trace-cmd extract trace-cmd/listen: Introduce trace-msg protocol (protocol v2) trace-cmd/msg: Use poll(2) to wait for a message trace-cmd/virt-server: Add virt-server mode for a virtualization environment trace-cmd/record: Add --virt option for record mode trace-cmd/virt-server: Add --dom option which makes a domain directory to virt-server trace-cmd: Use pid instead of libvirt virt domain name
Documentation/Protocol.txt | 163 +++++ Documentation/trace-cmd-record.1.txt | 12 Documentation/trace-cmd-virt-server.1.txt | 113 ++++ Makefile | 3 trace-cmd.c | 3 trace-cmd.h | 15 + trace-listen.c | 687 +++++++++++++++++++---- trace-msg.c | 870 +++++++++++++++++++++++++++++ trace-msg.h | 31 + trace-output.c | 4 trace-record.c | 158 +++++ trace-recorder.c | 50 +- trace-usage.c | 18 + 13 files changed, 1991 insertions(+), 136 deletions(-) create mode 100644 Documentation/Protocol.txt create mode 100644 Documentation/trace-cmd-virt-server.1.txt create mode 100644 trace-msg.c create mode 100644 trace-msg.h
-- Masami HIRAMATSU Linux Technology Research Center, System Productivity Research Dept. Center for Technology Innovation - Systems Engineering Hitachi, Ltd., Research & Development Group E-mail: masami.hiramatsu.pt@hitachi.com
| |