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* tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspaceRong Tao2022-11-091-14/+82
| | | | | | | | | Update EXIT_REASONS from source, including VMX_EXIT_REASONS, SVM_EXIT_REASONS, AARCH64_EXIT_REASONS, USERSPACE_EXIT_REASONS. Signed-off-by: Rong Tao <rongtao@cestc.cn> Message-Id: <tencent_00082C8BFA925A65E11570F417F1CD404505@qq.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix incorrect detection of debugfsMatthias Gerstner2022-11-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The first field in /proc/mounts can be influenced by unprivileged users through the widespread `fusermount` setuid-root program. Example: ``` user$ mkdir ~/mydebugfs user$ export _FUSE_COMMFD=0 user$ fusermount ~/mydebugfs -ononempty,fsname=debugfs user$ grep debugfs /proc/mounts debugfs /home/user/mydebugfs fuse rw,nosuid,nodev,relatime,user_id=1000,group_id=100 0 0 ``` If there is no debugfs already mounted in the system then this can be used by unprivileged users to trick kvm_stat into using a user controlled file system location for obtaining KVM statistics. Even though the root user is not allowed to access non-root FUSE mounts for security reasons, the unprivileged user can unmount the FUSE mount before kvm_stat uses the mounted path. If it wins the race, kvm_stat will read from the location where the FUSE mount resided. Note that the files in debugfs are only opened for reading, so the attacker can cause very large data to be read in by kvm_stat, or fake data to be processed, but there should be no viable way to turn this into a privilege escalation. The fix is simply to use the file system type field instead. Whitespace in the mount path is escaped in /proc/mounts thus no further safety measures in the parsing should be necessary to make this correct. Message-Id: <20221103135927.13656-1-matthias.gerstner@suse.de> Signed-off-by: Matthias Gerstner <matthias.gerstner@suse.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix display of error when multiple processes are foundDmitry Klochkov2022-06-151-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of printing an error message, kvm_stat script fails when we restrict statistics to a guest by its name and there are multiple guests with such name: # kvm_stat -g my_vm Traceback (most recent call last): File "/usr/bin/kvm_stat", line 1819, in <module> main() File "/usr/bin/kvm_stat", line 1779, in main options = get_options() File "/usr/bin/kvm_stat", line 1718, in get_options options = argparser.parse_args() File "/usr/lib64/python3.10/argparse.py", line 1825, in parse_args args, argv = self.parse_known_args(args, namespace) File "/usr/lib64/python3.10/argparse.py", line 1858, in parse_known_args namespace, args = self._parse_known_args(args, namespace) File "/usr/lib64/python3.10/argparse.py", line 2067, in _parse_known_args start_index = consume_optional(start_index) File "/usr/lib64/python3.10/argparse.py", line 2007, in consume_optional take_action(action, args, option_string) File "/usr/lib64/python3.10/argparse.py", line 1935, in take_action action(self, namespace, argument_values, option_string) File "/usr/bin/kvm_stat", line 1649, in __call__ ' to specify the desired pid'.format(" ".join(pids))) TypeError: sequence item 0: expected str instance, int found To avoid this, it's needed to convert pids int values to strings before pass them to join(). Signed-off-by: Dmitry Klochkov <kdmitry556@gmail.com> Message-Id: <20220614121141.160689-1-kdmitry556@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: kvm_stat: do not show halt_wait_nsChristian Borntraeger2021-10-181-1/+1
| | | | | | | | | | | | | | Similar to commit 111d0bda8eeb ("tools/kvm_stat: Exempt time-based counters"), we should not show timer values in kvm_stat. Remove the new halt_wait_ns. Fixes: 87bcc5fa092f ("KVM: stats: Add halt_wait_ns stats for all architectures") Cc: Jing Zhang <jingzhangos@google.com> Cc: Stefan Raspl <raspl@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20211006121724.4154-1-borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: Fix documentation typoStefan Raspl2021-05-071-1/+1
| | | | | | | | | Makes the dash in front of option '-z' disappear in the generated man-page. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20210506140352.4178789-1-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: Add restart delayStefan Raspl2021-03-301-0/+1
| | | | | | | | | | | | | | If this service is enabled and the system rebooted, Systemd's initial attempt to start this unit file may fail in case the kvm module is not loaded. Since we did not specify a delay for the retries, Systemd restarts with a minimum delay a number of times before giving up and disabling the service. Which means a subsequent kvm module load will have kvm running without monitoring. Adding a delay to fix this. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20210325122949.1433271-1-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: Exempt time-based countersStefan Raspl2020-12-111-1/+5
| | | | | | | | | | | | | | The new counters halt_poll_success_ns and halt_poll_fail_ns do not count events. Instead they provide a time, and mess up our statistics. Therefore, we should exclude them. Removal is currently implemented with an exempt list. If more counters like these appear, we can think about a more general rule like excluding all fields name "*_ns", in case that's a standing convention. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Tested-and-reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20201208210829.101324-1-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add sample systemd unit fileStefan Raspl2020-04-211-0/+16
| | | | | | | | | Add a sample unit file as a basis for systemd integration of kvm_stat logs. Signed-off-by: Stefan Raspl <raspl@de.ibm.com> Message-Id: <20200402085705.61155-4-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: Add command line switch '-L' to log to fileStefan Raspl2020-04-212-13/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | To integrate with logrotate, we have a signal handler that will re-open the logfile. Assuming we have a systemd unit file with ExecStart=kvm_stat -dtc -s 10 -L /var/log/kvm_stat.csv ExecReload=/bin/kill -HUP $MAINPID and a logrotate config featuring postrotate /bin/systemctl reload kvm_stat.service endscript Then the overall flow will look like this: (1) systemd starts kvm_stat, logging to A. (2) At some point, logrotate runs, moving A to B. kvm_stat continues to write to B at this point. (3) After rotating, logrotate restarts the kvm_stat unit via systemctl. (4) The kvm_stat unit sends a SIGHUP to kvm_stat, finally making it switch over to writing to A again. Note that in order to keep the structure of the cvs output in tact, we make sure to, in contrast to the standard log format, only write the header once at the beginning of a file. This implies that the header is suppressed when appending to an existing file. Unlike with the standard format, where we append to an existing file by starting out with a header. Signed-off-by: Stefan Raspl <raspl@de.ibm.com> Message-Id: <20200402085705.61155-3-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add command line switch '-z' to skip zero recordsStefan Raspl2020-04-212-8/+24
| | | | | | | | | When running in logging mode, skip records with all zeros (=empty records) to preserve space when logging to files. Signed-off-by: Stefan Raspl <raspl@de.ibm.com> Message-Id: <20200402085705.61155-2-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add command line switch '-c' to log in csv formatStefan Raspl2020-03-232-14/+53
| | | | | | | | | | | Add an alternative format that can be more easily used for further processing later on. Note that we add a timestamp in the first column for both, the regular and the new csv format. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20200306114250.57585-5-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add command line switch '-s' to set update intervalStefan Raspl2020-03-232-12/+38
| | | | | | | | | | | This now controls both, the refresh rate of the interactive mode as well as the logging mode. Which, as a consequence, means that the default of logging mode is now 3s, too (use command line switch '-s' to adjust to your liking). Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20200306114250.57585-4-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: switch to argparseStefan Raspl2020-03-231-80/+62
| | | | | | | | | | | | | | optparse is deprecated for a while, hence switching over to argparse (which also works with python2). As a consequence, help output has some subtle changes, the most significant one being that the options are all listed explicitly instead of a universal '[options]' indicator. Also, some of the error messages are phrased slightly different. While at it, squashed a number of minor PEP8 issues. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20200306114250.57585-3-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: rework command line sequence and message textsStefan Raspl2020-03-232-24/+25
| | | | | | | | | | | Make sure command line arguments are sorted alphabetically everywhere, and adjusted existing texts for interactive command 's' to become consistent with the long form --set-delay. Throwing in some PEP8 fixes (all cosmetics) for good measure. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Message-Id: <20200306114250.57585-2-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: Fix kvm_exit filter nameGavin Shan2020-01-231-2/+6
| | | | | | | | | | | | | | | | The filter name is fixed to "exit_reason" for some kvm_exit events, no matter what architect we have. Actually, the filter name ("exit_reason") is only applicable to x86, meaning it's broken on other architects including aarch64. This fixes the issue by providing various kvm_exit filter names, depending on architect we're on. Afterwards, the variable filter name is picked and applied through ioctl(fd, SET_FILTER). Reported-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Gavin Shan <gshan@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499Thomas Gleixner2019-06-191-2/+1
| | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this work is licensed under the terms of the gnu gpl version 2 see the copying file in the top level directory extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 35 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.797835076@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tools/kvm_stat: fix fields filter for child eventsStefan Raspl2019-05-242-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The fields filter would not work with child fields, as the respective parents would not be included. No parents displayed == no childs displayed. To reproduce, run on s390 (would work on other platforms, too, but would require a different filter name): - Run 'kvm_stat -d' - Press 'f' - Enter 'instruct' Notice that events like instruction_diag_44 or instruction_diag_500 are not displayed - the output remains empty. With this patch, we will filter by matching events and their parents. However, consider the following example where we filter by instruction_diag_44: kvm statistics - summary regex filter: instruction_diag_44 Event Total %Total CurAvg/s exit_instruction 276 100.0 12 instruction_diag_44 256 92.8 11 Total 276 12 Note that the parent ('exit_instruction') displays the total events, but the childs listed do not match its total (256 instead of 276). This is intended (since we're filtering all but one child), but might be confusing on first sight. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: switch to python3Stefan Raspl2018-11-271-1/+1
| | | | | | | | | | | | | The current shebang does not work in environments that only support python3 and have no python2 installed. Plus there does not seem to be a way to support python2 and python3 at the same time. Since all known python3 issues were fixed, and as python3 is the way to go, let's switch over. Note that the code is still python2 compliant, so folks in bad use can simply revert the shebang. Suggested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com> Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: cut down decimal places in update interval dialogStefan Raspl2018-10-011-1/+1
| | | | | | | | | We currently display the default number of decimal places for floats in _show_set_update_interval(), which is quite pointless. Cutting down to a single decimal place. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: re-animate display of dead guestsStefan Raspl2018-08-301-0/+10
| | | | | | | | | | | When filtering by guest (interactive commands 'p'/'g'), and the respective guest was destroyed, detect when the guest is up again through the guest name if possible. I.e. when displaying events for a specific guest, it is not necessary anymore to restart kvm_stat in case the guest is restarted. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: indicate dead guests as suchStefan Raspl2018-08-301-3/+9
| | | | | | | | | | For destroyed guests, kvm_stat essentially freezes with the last data displayed. This is acceptable for users, in case they want to inspect the final data. But it looks a bit irritating. Therefore, detect this situation and display a respective indicator in the header. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: handle guest removals more gracefullyStefan Raspl2018-08-301-2/+9
| | | | | | | | | | | | | When running with the DebugFS provider, removal of a guest can result in a negative CurAvg/s, which looks rather confusing. If so, suppress the body refresh and print a message instead. To reproduce, have at least one guest A completely booted. Then start another guest B (which generates a huge amount of events), then destroy B. On the next refresh, kvm_stat should display a whole lot of negative values in the CurAvg/s column. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: don't reset stats when setting PID filter for debugfsStefan Raspl2018-08-301-1/+0
| | | | | | | | | | | | | | When setting a PID filter in debugfs, we unnecessarily reset the statistics, although there is no reason to do so. This behavior was merely introduced with commit 9f114a03c6854f "tools/kvm_stat: add interactive command 'r'", most likely to mimic the behavior of the tracepoints provider in this respect. However, there are plenty of differences between the two providers, so there is no reason not to take advantage of the possibility to filter by PID without resetting the statistics. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: fix updates for dead guestsStefan Raspl2018-08-301-1/+10
| | | | | | | | | | | With pid filtering active, when a guest is removed e.g. via virsh shutdown, successive updates produce garbage. Therefore, we add code to detect this case and prevent further body updates. Note that when displaying the help dialog via 'h' in this case, once we exit we're stuck with the 'Collecting data...' message till we remove the filter. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: fix handling of invalid paths in debugfs providerStefan Raspl2018-08-301-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When filtering by guest, kvm_stat displays garbage when the guest is destroyed - see sample output below. We add code to remove the invalid paths from the providers, so at least no more garbage is displayed. Here's a sample output to illustrate: kvm statistics - pid 13986 (foo) Event Total %Total CurAvg/s diagnose_258 -2 0.0 0 deliver_program_interruption -3 0.0 0 diagnose_308 -4 0.0 0 halt_poll_invalid -91 0.0 -6 deliver_service_signal -244 0.0 -16 halt_successful_poll -250 0.1 -17 exit_pei -285 0.1 -19 exit_external_request -312 0.1 -21 diagnose_9c -328 0.1 -22 userspace_handled -713 0.1 -47 halt_attempted_poll -939 0.2 -62 deliver_emergency_signal -3126 0.6 -208 halt_wakeup -7199 1.5 -481 exit_wait_state -7379 1.5 -493 diagnose_500 -56499 11.5 -3757 exit_null -85491 17.4 -5685 diagnose_44 -133300 27.1 -8874 exit_instruction -195898 39.8 -13037 Total -492063 Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: fix python3 issuesStefan Raspl2018-08-301-3/+3
| | | | | | | | | | | Python3 returns a float for a regular division - switch to a division operator that returns an integer. Furthermore, filters return a generator object instead of the actual list - wrap result in yet another list, which makes it still work in both, Python2 and 3. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: Remove unused functionCole Robinson2018-03-281-3/+0
| | | | | | | | Unused since added in 18e8f4100 Signed-off-by: Cole Robinson <crobinso@redhat.com> Reviewed-and-tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: Don't use deprecated file()Cole Robinson2018-03-281-1/+1
| | | | | | | | | | | | | | | | | | $ python3 tools/kvm/kvm_stat/kvm_stat Traceback (most recent call last): File "tools/kvm/kvm_stat/kvm_stat", line 1668, in <module> main() File "tools/kvm/kvm_stat/kvm_stat", line 1639, in main assign_globals() File "tools/kvm/kvm_stat/kvm_stat", line 1618, in assign_globals for line in file('/proc/mounts'): NameError: name 'file' is not defined open() is the python3 way, and works on python2.6+ Signed-off-by: Cole Robinson <crobinso@redhat.com> Reviewed-and-tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: Fix python3 syntaxCole Robinson2018-03-281-2/+4
| | | | | | | | | | | | | | $ python3 tools/kvm/kvm_stat/kvm_stat File "tools/kvm/kvm_stat/kvm_stat", line 1137 def sortkey((_k, v)): ^ SyntaxError: invalid syntax Fix it in a way that's compatible with python2 and python3 Signed-off-by: Cole Robinson <crobinso@redhat.com> Tested-by: Stefan Raspl <stefan.raspl@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
* tools/kvm_stat: print 'Total' line for multiple events onlyStefan Raspl2018-02-241-1/+1
| | | | | | | | | The 'Total' line looks a bit weird when we have a single event only. This can happen e.g. due to filters. Therefore suppress when there's only a single event in the output. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: group child events indented after parentStefan Raspl2018-02-241-30/+59
| | | | | | | | | | | | | | We keep the current logic that sorts all events (parent and child), but re-shuffle the events afterwards, grouping the children after the respective parent. Note that the percentage column for child events gives the percentage of the parent's total. Since we rework the logic anyway, we modify the total average calculation to use the raw numbers instead of the (rounded) averages. Note that this can result in differing numbers (between total average and the sum of the individual averages) due to rounding errors. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: separate drilldown and fields filteringStefan Raspl2018-02-241-43/+100
| | | | | | | | | | | | | | | | | | | | | | | Drilldown (i.e. toggle display of child trace events) was implemented by overriding the fields filter. This resulted in inconsistencies: E.g. when drilldown was not active, adding a filter that also matches child trace events would not only filter fields according to the filter, but also add in the child trace events matching the filter. E.g. on x86, setting 'kvm_userspace_exit' as the fields filter after startup would result in display of kvm_userspace_exit(DCR), although that wasn't previously present - not exactly what one would expect from a filter. This patch addresses the issue by keeping drilldown and fields filter separate. While at it, we also fix a PEP8 issue by adding a blank line at one place (since we're in the area...). We implement this by adding a framework that also allows to define a taxonomy among the debugfs events to identify child trace events. I.e. drilldown using 'x' can now also work with debugfs. A respective parent- child relationship is only known for S390 at the moment, but could be added adjusting other platforms' ARCH.dbg_is_child() methods accordingly. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: eliminate extra guest/pid selection dialogStefan Raspl2018-02-242-75/+39
| | | | | | | | | | | | We can do with a single dialog that takes both, pids and guest names. Note that we keep both interactive commands, 'p' and 'g' for now, to avoid confusion among users used to a specific key. While at it, we improve on some minor glitches regarding curses usage, e.g. cursor still visible when not supposed to be. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: mark private methods as suchStefan Raspl2018-02-241-66/+66
| | | | | | | | Helps quite a bit reading the code when it's obvious when a method is intended for internal use only. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix debugfs handlingStefan Raspl2018-02-241-14/+26
| | | | | | | | | | | | | | | Te checks for debugfs assumed that debugfs is always mounted at /sys/kernel/debug - which is likely, but not guaranteed. This is addressed by checking /proc/mounts for the actual location. Furthermore, when debugfs was mounted, but the kvm module not loaded, a misleading error pointing towards debugfs not present was given. To reproduce, (a) run kvm_stat with debugfs mounted at a place different from /sys/kernel/debug (b) run kvm_stat with debugfs mounted but kvm module not loaded Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: print error on invalid regexStefan Raspl2018-02-241-0/+3
| | | | | | | | | Entering an invalid regular expression did not produce any indication of an error so far. To reproduce, press 'f' and enter 'foo(' (with an unescaped bracket). Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix crash when filtering out all non-child trace eventsStefan Raspl2018-02-241-0/+6
| | | | | | | | | | When we apply a filter that will only leave child trace events, we receive a ZeroDivisionError when calculating the percentages. In that case, provide percentages based on child events only. To reproduce, run 'kvm_stat -f .*[\(].*'. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: avoid 'is' for equality checksMarc Hartmayer2018-02-241-2/+2
| | | | | | | | | | | | | | Use '==' for equality checks and 'is' when comparing identities. An example where '==' and 'is' behave differently: >>> a = 4242 >>> a == 4242 True >>> a is 4242 False Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: use a more pythonic way to iterate over dictionariesMarc Hartmayer2018-02-241-8/+8
| | | | | | | | | | If it's clear that the values of a dictionary will be used then use the '.items()' method. Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Tested-by: Stefan Raspl <raspl@linux.vnet.ibm.com> [Include fix for logging mode by Stefan Raspl] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: use a namedtuple for storing the valuesMarc Hartmayer2018-02-241-12/+15
| | | | | | | | | | | Use a namedtuple for storing the values as it allows to access the fields of a tuple via names. This makes the overall code much easier to read and to understand. Access by index is still possible as before. Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Tested-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: simplify the sortkey functionMarc Hartmayer2018-02-241-15/+8
| | | | | | | | | | | | | The 'sortkey' function references a value in its enclosing scope (closure). This is not common practice for a sort key function so let's replace it. Additionally, the function 'sorted' has already a parameter for reversing the result therefore the inversion of the values is unneeded. The check for stats[x][1] is also superfluous as it's ensured that this value is initialized with 0. Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Tested-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: sort '-f help' outputStefan Raspl2017-12-211-10/+6
| | | | | | | | | Sort the fields returned by specifying '-f help' on the command line. While at it, simplify the code a bit, indent the output and eliminate an extra blank line at the beginning. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add line for totalsStefan Raspl2017-12-141-1/+8
| | | | | | | | | | | | Add a line for the total number of events and current average at the bottom of the body. Note that both values exclude child trace events. I.e. if drilldown is activated via interactive command 'x', only the totals are accounted, or we'd be counting these twice (see previous commit "tools/kvm_stat: fix child trace events accounting"). Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: stop ignoring unhandled argumentsStefan Raspl2017-12-141-1/+3
| | | | | | | | | | Unhandled arguments, which could easily include typos, are simply ignored. We should be strict to avoid undetected typos. To reproduce start kvm_stat with an extra argument, e.g. 'kvm_stat -d bnuh5ol' and note that this will actually work. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: suppress usage information on command line errorsStefan Raspl2017-12-141-8/+5
| | | | | | | | | | | Errors while parsing the '-g' command line argument result in display of usage information prior to the error message. This is a bit confusing, as the command line is syntactically correct. To reproduce, run 'kvm_stat -g' and specify a non-existing or inactive guest. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: handle invalid regular expressionsStefan Raspl2017-12-141-0/+7
| | | | | | | | | | Passing an invalid regular expression on the command line results in a traceback. Note that interactive specification of invalid regular expressions is not affected To reproduce, run "kvm_stat -f '*'". Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: add hint on '-f help' to man pageStefan Raspl2017-12-141-1/+1
| | | | | | | The man page update for this new functionality was omitted. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix child trace events accountingStefan Raspl2017-12-142-3/+5
| | | | | | | | | | | | | | | | Child trace events were included in calculation of the overall total, which is used for calculation of the percentages of the '%Total' column. However, the parent trace envents' stats summarize the child trace events, hence we'd incorrectly account for them twice, leading to slightly wrong stats. With this fix, we use the correct total. Consequently, the sum of the child trace events' '%Total' column values is identical to the respective value of the respective parent event. However, this also means that the sum of the '%Total' column values will aggregate to more than 100 percent. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix extra handling of 'help' with fields filterStefan Raspl2017-12-141-1/+2
| | | | | | | | | | | Commit 67fbcd62f54d ("tools/kvm_stat: add '-f help' to get the available event list") added support for '-f help'. However, the extra handling of 'help' will also take effect when 'help' is specified as a regex in interactive mode via 'f'. This results in display of all events while only those matching this regex should be shown. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* tools/kvm_stat: fix missing field update after filter changeStefan Raspl2017-12-141-2/+2
| | | | | | | | | | | | | | | When updating the fields filter, tracepoint events of fields previously not visible were not enabled, as TracepointProvider.update_fields() updated the member variable directly instead of using the setter, which triggers the event enable/disable. To reproduce, run 'kvm_stat -f kvm_exit', press 'c' to remove the filter, and notice that no add'l fields that do not match the regex 'kvm_exit' will appear. This issue was introduced by commit c469117df059 ("tools/kvm_stat: simplify initializers"). Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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