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9b76b08ae4
This change adds some systemtap/dtrace probes to the QEMU monitor client code. In particular it allows watching of all operations for a VM * examples/systemtap/qemu-monitor.stp: Watch all monitor commands * src/Makefile.am: Passing libdir/bindir/sbindir to dtrace2systemtap.pl * src/dtrace2systemtap.pl: Accept libdir/bindir/sbindir as args and look for '# binary:' comment to mark probes against libvirtd vs libvirt.so * src/qemu/qemu_monitor.c, src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_text.c: Add probes for key functions
81 lines
3.3 KiB
Plaintext
81 lines
3.3 KiB
Plaintext
#!/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 messages sent/received between libvirt
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# and the QEMU monitor
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#
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# stap qemu-monitor.stp
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# 0.000 begin
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# 3.848 ! 0x7f2dc00017b0 {"timestamp": {"seconds": 1319466931, "microseconds": 187755}, "event": "SHUTDOWN"}
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# 5.773 > 0x7f2dc0007960 {"execute":"qmp_capabilities","id":"libvirt-1"}
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# 5.774 < 0x7f2dc0007960 {"return": {}, "id": "libvirt-1"}
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# 5.774 > 0x7f2dc0007960 {"execute":"query-commands","id":"libvirt-2"}
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# 5.777 < 0x7f2dc0007960 {"return": [{"name": "quit"}, {"name": ....snip....
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# 5.777 > 0x7f2dc0007960 {"execute":"query-chardev","id":"libvirt-3"}
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# 5.778 < 0x7f2dc0007960 {"return": [{"filename": ....snip....
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# 5.779 > 0x7f2dc0007960 {"execute":"query-cpus","id":"libvirt-4"}
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# 5.780 < 0x7f2dc0007960 {"return": [{"current": true, "CPU": 0, "pc": 1048560, "halted": false, "thread_id": 13299}], "id": "libvirt-4"}
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# 5.780 > 0x7f2dc0007960 {"execute":"set_password","arguments":{"protocol":"vnc","password":"123456","connected":"keep"},"id":"libvirt-5"}
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# 5.782 < 0x7f2dc0007960 {"return": {}, "id": "libvirt-5"}
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# 5.782 > 0x7f2dc0007960 {"execute":"expire_password","arguments":{"protocol":"vnc","time":"never"},"id":"libvirt-6"}
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# 5.783 < 0x7f2dc0007960 {"return": {}, "id": "libvirt-6"}
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# 5.783 > 0x7f2dc0007960 {"execute":"balloon","arguments":{"value":224395264},"id":"libvirt-7"}
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# 5.785 < 0x7f2dc0007960 {"return": {}, "id": "libvirt-7"}
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# 5.785 > 0x7f2dc0007960 {"execute":"cont","id":"libvirt-8"}
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# 5.789 ! 0x7f2dc0007960 {"timestamp": {"seconds": 1319466933, "microseconds": 129980}, "event": "RESUME"}
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# 5.789 < 0x7f2dc0007960 {"return": {}, "id": "libvirt-8"}
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# 7.537 ! 0x7f2dc0007960 {"timestamp": {"seconds": 1319466934, "microseconds": 881214}, "event": "SHUTDOWN"}
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#
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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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# Just so we know the script is now running
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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.qemu.monitor_send_msg {
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if (fd != -1) {
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print_ts(sprintf("> %p %s (fd=%d)", mon, substr(msg, 0, strlen(msg)-2), fd));
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} else {
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print_ts(sprintf("> %p %s", mon, substr(msg, 0, strlen(msg)-2)));
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}
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}
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probe libvirt.qemu.monitor_recv_reply {
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print_ts(sprintf("< %p %s", mon, reply));
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}
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probe libvirt.qemu.monitor_recv_event {
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print_ts(sprintf("! %p %s", mon, event));
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}
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