commit e0b2fd0efb4d282bc6fa0ed5397f472298a66ca2
author Stefan Hajnoczi <stefanha@redhat.com> Sun Jun 22 21:46:07 2014 +0800
committer Stefan Hajnoczi <stefanha@redhat.com> Tue Aug 12 14:26:11 2014 +0100
tree 4f1d8fd1d76b349ad1f7bf6d8c572228a1b42392
parent 15327c3df049c9621ff9b542ccbfc3d17203d1f7

trace: install simpletrace SystemTap tapset

The simpletrace SystemTap tapset outputs simpletrace binary traces for
SystemTap probes.  This is useful because SystemTap has no default way
to format or store traces.  The simpletrace SystemTap tapset provides an
easy way to store traces.

The simpletrace.py tool or custom Python scripts using the
simpletrace.py API can analyze SystemTap these traces:

  $ ./configure --enable-trace-backends=dtrace ...
  $ make && make install
  $ stap -e 'probe qemu.system.x86_64.simpletrace.* {}' \
         -c qemu-system-x86_64 >/tmp/trace.out
  $ scripts/simpletrace.py --no-header trace-events /tmp/trace.out
  g_malloc 4.531 pid=15519 size=0xb ptr=0x7f8639c10470
  g_malloc 3.264 pid=15519 size=0x300 ptr=0x7f8639c10490
  g_free 5.155 pid=15519 ptr=0x7f8639c0f7b0

Note that, unlike qemu-system-x86_64.stp and
qemu-system-x86_64.stp-installed, only one file is needed since the
simpletrace SystemTap tapset does not reference the QEMU binary by path.
Therefore it doesn't matter whether the QEMU binary is installed or not.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>