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1223910ba8
This removes the old example for legacy probes and adds two new scripts demonstrating many of the new probe point facilities. The rpc-monitor.stp script will print out friendly details of all RPC traffic between a libvirt client/server. This is incredibly useful in seeing what RPC calls are being made, and also debugging problems in the RPC protocol code The events.stp script will print out lots of info about the poll event loop, which is useful for debugging event handling problems * examples/systemtap/events.stp, examples/systemtap/rpc-monitor.stp: New examples * examples/systemtap/client.stp: Remove obsolete example
134 lines
3.6 KiB
Plaintext
Executable File
134 lines
3.6 KiB
Plaintext
Executable File
#!/usr/bin/stap
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#
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# Copyright (C) 2011 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Author: Daniel P. Berrange <berrange@redhat.com>
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#
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# This script will monitor all operation of the libvirt event loop
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# in both client and server. Example output is:
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#
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# 0.000 begin
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# 2.359 18185 + handle 1 4 1
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# 2.360 18185 + handle 2 6 1
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# 2.360 18185 * handle 2 0
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# 2.360 14370 > handle 3 1
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# 2.360 14370 + handle 33 16 1
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# 2.361 14370 ~ 7 -1
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# 2.361 14370 > handle 33 1
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# 2.361 14370 * handle 33 1
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# 2.361 14370 * handle 33 1
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# 2.361 14370 * handle 33 3
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# 2.361 14370 ~ 7 -1
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# 2.361 14370 > handle 1 1
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# 2.361 14370 ~ 7 -1
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# 2.361 14370 > handle 33 2
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# 2.361 14370 * handle 33 1
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# 2.361 14370 ~ 7 -1
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# 2.361 18185 * handle 2 1
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# 2.362 18185 * handle 2 0
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# 2.362 14370 > handle 33 1
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# 2.362 14370 * handle 33 1
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# 2.362 14370 * handle 33 1
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# 2.362 14370 ~ 7 -1
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# 2.367 14370 * handle 33 3
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# 2.367 14370 > handle 1 1
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# 2.367 14370 ~ 7 -1
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# 2.367 14370 > handle 33 2
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# 2.367 14370 * handle 33 1
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# 2.367 14370 ~ 7 -1
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# 2.370 18185 - timeout 1
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# 2.370 14370 ! handle 33
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# 2.371 14370 - handle 33
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# 2.371 14370 ~ 6 -1
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#
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# Legend:
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# + Add
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# - Remove
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# * Update
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# > dispatch
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# ! purge
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# ~ Iterate
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#
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#
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# Show all updates to registered timeouts/handles
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global showUpdates = 1
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# Show when handles/timeouts are dispatched
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global showDispatch = 1
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# Show iterations of the event loop
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global showIter = 1
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global start
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# Print a string, with a timestamp relative to the start of the script
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function print_ts(msg)
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{
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now = gettimeofday_ns() / (1000*1000)
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delta = (now - start)
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printf("%3d.%03d %s\n", (delta / 1000), (delta % 1000), msg);
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}
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probe begin {
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start = gettimeofday_ns() / (1000*1000)
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print_ts("begin");
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}
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probe libvirt.event_poll.add_handle {
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print_ts(sprintf("%d + handle %d %d %d", pid(), watch, fd, events));
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}
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probe libvirt.event_poll.remove_handle {
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print_ts(sprintf("%d - handle %d", pid(), watch));
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}
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probe libvirt.event_poll.update_handle {
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if (showUpdates)
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print_ts(sprintf("%d * handle %d %d", pid(), watch, events));
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}
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probe libvirt.event_poll.purge_handle {
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print_ts(sprintf("%d ! handle %d", pid(), watch));
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}
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probe libvirt.event_poll.dispatch_handle {
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if (showDispatch)
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print_ts(sprintf("%d > handle %d %d", pid(), watch, events));
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}
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probe libvirt.event_poll.add_timeout {
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print_ts(sprintf("%d + timeout %d %d", pid(), timer, frequency));
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}
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probe libvirt.event_poll.remove_timeout {
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print_ts(sprintf("%d - timeout %d", pid(), timer));
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}
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probe libvirt.event_poll.update_timeout {
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if (showUpdates)
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print_ts(sprintf("%d * timeout %d %d", pid(), timer, frequency));
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}
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probe libvirt.event_poll.purge_timeout {
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print_ts(sprintf("%d ! timeout %d", pid(), timer));
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}
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probe libvirt.event_poll.dispatch_timeout {
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if (showDispatch)
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print_ts(sprintf("%d > timeout %d", pid(), timer));
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}
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probe libvirt.event_poll.run {
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if (showIter)
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print_ts(sprintf("%d ~ %d %d", pid(), nfds, timeout));
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}
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