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2023-09-26simpletrace: added simplified Analyzer2 classMads Ynddal1-23/+75
By moving the dynamic argument construction to keyword-arguments, we can remove all of the specialized handling, and streamline it. If a tracing method wants to access these, they can define the kwargs, or ignore it be placing `**kwargs` at the end of the function's arguments list. Added deprecation warning to Analyzer class to make users aware of the Analyzer2 class. No removal date is planned. Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-13-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: move event processing to Analyzer classMads Ynddal1-24/+36
Moved event processing to the Analyzer class to separate specific analyzer logic (like caching and function signatures) from the _process function. This allows for new types of Analyzer-based subclasses without changing the core code. Note, that the fn_cache is important for performance in cases where the analyzer is branching away from the catch-all a lot. The cache has no measurable performance penalty. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-12-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: move logic of process into internal functionMads Ynddal1-8/+18
To avoid duplicate code depending on input types and to better handle open/close of log with a context-manager, we move the logic of process into _process. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-11-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: refactor to separate responsibilitiesMads Ynddal1-62/+53
Moved event_mapping and event_id_to_name down one level in the function call-stack to keep variable instantiation and usage closer (`process` and `run` has no use of the variables; `read_trace_records` does). Instead of passing event_mapping and event_id_to_name to the bottom of the call-stack, we move their use to `read_trace_records`. This separates responsibility and ownership of the information. `read_record` now just reads the arguments from the file-object by knowning the total number of bytes. Parsing it to specific arguments is moved up to `read_trace_records`. Special handling of dropped events removed, as they can be handled by the general code. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-10-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: made Analyzer into context-managerMads Ynddal1-11/+20
Instead of explicitly calling `begin` and `end`, we can change the class to use the context-manager paradigm. This is mostly a styling choice, used in modern Python code. But it also allows for more advanced analyzers to handle exceptions gracefully in the `__exit__` method (not demonstrated here). Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-9-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: define exception and add handlingMads Ynddal1-8/+14
Define `SimpleException` to differentiate our exceptions from generic exceptions (IOError, etc.). Adapted simpletrace to support this and output to stderr. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-8-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: improved error handling on struct unpackMads Ynddal1-25/+16
A failed call to `read_header` wouldn't be handled the same for the two different code paths (one path would try to use `None` as a list). Changed to raise exception to be handled centrally. This also allows for easier unpacking, as errors has been filtered out. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-7-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: update code for Python 3.11Mads Ynddal1-1/+1
The call to `getargspec` was deprecated and in Python 3.11 it has been removed in favor of `getfullargspec`. `getfullargspec` is compatible with QEMU's requirement of at least Python version 3.6. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-6-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: changed naming of edict and idtoname to improve readabilityMads Ynddal1-17/+17
Readability is subjective, but I've expanded the naming of the variables and arguments, to help with understanding for new eyes on the code. Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20230926103436.25700-5-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: improve parsing of sys.argv; fix files never closed.Mads Ynddal1-16/+34
The arguments extracted from `sys.argv` named and unpacked to make it clear what the arguments are and what they're used for. The two input files were opened, but never explicitly closed. File usage changed to use `with` statement to take care of this. At the same time, ownership of the file-object is moved up to `run` function. Added option to process to support file-like objects. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-4-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: annotate magic constants from QEMU codeMads Ynddal1-0/+5
It wasn't clear where the constants and structs came from, so I added comments to help. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-3-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-09-26simpletrace: add __all__ to define public interfaceMads Ynddal1-0/+2
It was unclear what was the supported public interface. I.e. when refactoring the code, what functions/classes are important to retain. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Mads Ynddal <m.ynddal@samsung.com> Message-id: 20230926103436.25700-2-mads@ynddal.dk Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2021-06-02docs: fix references to docs/devel/tracing.rstStefano Garzarella1-1/+1
Commit e50caf4a5c ("tracing: convert documentation to rST") converted docs/devel/tracing.txt to docs/devel/tracing.rst. We still have several references to the old file, so let's fix them with the following command: sed -i s/tracing.txt/tracing.rst/ $(git grep -l docs/devel/tracing.txt) Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210517151702.109066-2-sgarzare@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
2021-02-01simpletrace: build() missing 2 required positional argumentsVolker Rümelin1-1/+3
Commit 4e66c9ef64 "tracetool: add input filename and line number to Event" forgot to add a line number and a filename argument at one build method call site. Traceback (most recent call last): File "./scripts/simpletrace.py", line 261, in <module> run(Formatter()) File "./scripts/simpletrace.py", line 236, in run process(events, sys.argv[2], analyzer, read_header=read_header) File "./scripts/simpletrace.py", line 177, in process dropped_event = Event.build("Dropped_Event(uint64_t num_events_dropped)") TypeError: build() missing 2 required positional arguments: 'lineno' and 'filename' Add the missing arguments. Signed-off-by: Volker Rümelin <vr_qemu@t-online.de> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210131173415.3392-1-vr_qemu@t-online.de Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2020-02-07drop "from __future__ import print_function"Paolo Bonzini1-1/+0
This is only needed for Python 2, which we do not support anymore. Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20200204160604.19883-1-pbonzini@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-02-07scripts: Explicit usage of Python 3 (scripts with __main__)Philippe Mathieu-Daudé1-1/+1
Use the program search path to find the Python 3 interpreter. Patch created mechanically by running: $ sed -i "s,^#\!/usr/bin/\(env\ \)\?python$,#\!/usr/bin/env python3," \ $(git grep -l 'if __name__.*__main__') Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Suggested-by: Daniel P. Berrangé <berrange@redhat.com> Suggested-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200130163232.10446-6-philmd@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-01-17scripts: Remove unused python importsPhilippe Mathieu-Daudé1-1/+0
Reported-by: LGTM code review Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20181108143422.15955-1-philmd@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-29simpletrace: Convert name from mapping record to strEduardo Habkost1-1/+1
The rest of the code assumes that idtoname is a (int -> str) dictionary, so convert the data accordingly. This is necessary to make the script work with Python 3 (where reads from a binary file return 'bytes' objects, not 'str'). Fixes the following error: $ python3 ./scripts/simpletrace.py trace-events-all trace-27445 b'object_class_dynamic_cast_assert' event is logged but is not \ declared in the trace events file, try using trace-events-all instead. Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-id: 20180619194549.15584-1-ehabkost@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-06-08python: futurize -f lib2to3.fixes.fix_exceptEduardo Habkost1-1/+1
Convert "except X, T" to "except X as T". This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f lib2to3.fixes.fix_except $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-10-ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08python: futurize -f libfuturize.fixes.fix_print_with_importEduardo Habkost1-1/+2
Change all Python code to use print as a function. This is necessary for Python 3 compatibility. Done using: $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \ sort -u | grep -v README.sh4) $ futurize -w -f libfuturize.fixes.fix_print_with_import $py Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Fam Zheng <famz@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20180608122952.2009-2-ehabkost@redhat.com> [ehabkost: fixup tests/docker/docker.py] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-03-12trace: include filename when printing parser error messagesDaniel P. Berrangé1-2/+2
Improves error messages from: ValueError: Error on line 72: need more than 1 value to unpack To ValueError: Error at /home/berrange/src/virt/qemu/trace-events:72: need more than 1 value to unpack Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20180306154650.24075-1-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-03-12simpletrace: fix timestamp argument typeStefan Hajnoczi1-1/+1
The timestamp argument to a trace event method is documented as follows: The method can also take a timestamp argument before the trace event arguments: def runstate_set(self, timestamp, new_state): ... Timestamps have the uint64_t type and are in nanoseconds. In reality methods with a timestamp argument actually receive a tuple like (123456789,) as the timestamp argument. This is due to a bug in simpletrace.py. This patch unpacks the tuple so that methods receive the correct timestamp argument type. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 20180222163901.14095-1-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-08-15simpletrace: fix flight recorder --no-header optionStefan Hajnoczi1-6/+18
The simpletrace.py script can pretty-print flight recorder ring buffers. These are not full simpletrace binary trace files but just the end of a trace file. There is no header and the event ID mapping information is often unavailable since the ring buffer may have filled up and discarded event ID mapping records. The simpletrace.stp script that generates ring buffer traces uses the same trace-events-all input file as simpletrace.py. Therefore both scripts have the same global ordering of trace events. A dynamic event ID mapping isn't necessary: just use the trace-events-all file as the reference for how event IDs are numbered. It is now possible to analyze simpletrace.stp ring buffers again using: $ ./simpletrace.py trace-events-all path/to/ring-buffer Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170815084430.7128-3-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-07-31docs: fix broken paths to docs/devel/tracing.txtPhilippe Mathieu-Daudé1-1/+1
With the move of some docs/ to docs/devel/ on ac06724a71, no references were updated. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-06-07simpletrace: Improve the error message if event is not declaredJose Ricardo Ziviani1-1/+9
Today, if we use a trace-event file which does not declare an event existing in the log file we'll get the following error: $ scripts/simpletrace.py trace-events trace-68508 Traceback (most recent call last): File "scripts/simpletrace.py", line 242, in <module> run(Formatter()) File "scripts/simpletrace.py", line 217, in run process(events, sys.argv[2], analyzer, read_header=read_header) File "scripts/simpletrace.py", line 192, in process for rec in read_trace_records(edict, log): File "scripts/simpletrace.py", line 107, in read_trace_records rec = read_record(edict, idtoname, fobj) File "scripts/simpletrace.py", line 71, in read_record return get_record(edict, idtoname, rechdr, fobj) File "scripts/simpletrace.py", line 45, in get_record event = edict[name] KeyError: 'qemu_mutex_locked' This patch improves this error by adding a hint instead of just that KeyError log: $ scripts/simpletrace.py trace-events trace-68508 'qemu_mutex_locked' event is logged but is not declared in the trace events file, try using trace-events-all instead. Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1496075404-8845-1-git-send-email-joserz@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-04-21simpletrace: document Analyzer method signaturesStefan Hajnoczi1-1/+22
Users can inherit from the simpletrace.Analyzer class and receive callbacks when events of interest occur in a trace file. The method signature is a little magic because the timestamp and pid arguments are optional. Document this. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20170411095654.18383-1-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-01-31trace: improve error reporting when parsing simpletrace headerDaniel P. Berrange1-3/+7
When loading a simpletrace binary file we just report "Not a valid trace file!" which is not very helpful. Report exactly which field we found to be invalid. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 20170125161417.31949-9-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-10-12trace: rename _read_events to read_eventsDaniel P. Berrange1-3/+3
The _read_events method is used by callers outside of its module, so should be a public method, not private. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-18-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-10-12trace: emit name <-> ID mapping in simpletrace headerDaniel P. Berrange1-14/+36
Currently simpletrace assumes that events are given IDs starting from 0, based on the order in which they appear in the trace-events file, with no gaps. When the trace-events file is split up, this assumption becomes problematic. To deal with this, extend the simpletrace format so that it outputs a table of event name <-> ID mappings. That will allow QEMU to assign arbitrary IDs to events without breaking simpletrace parsing. The v3 simple trace format was FILE HEADER EVENT TRACE RECORD 0 EVENT TRACE RECORD 1 ... EVENT TRACE RECORD N The v4 simple trace format is now FILE HEADER EVENT MAPPING RECORD 0 EVENT MAPPING RECORD 1 ... EVENT MAPPING RECORD M EVENT TRACE RECORD RECORD 0 EVENT TRACE RECORD RECORD 1 ... EVENT TRACE RECORD N Although this shows all the mapping records being emitted upfront, this is not required by the format. While the main simpletrace backend will emit all mappings at startup, the systemtap simpletrace.stp script will emit the mappings at first use. eg FILE HEADER ... EVENT MAPPING RECORD 0 EVENT TRACE RECORD RECORD 0 EVENT TRACE RECORD RECORD 1 EVENT MAPPING RECORD 1 EVENT TRACE RECORD RECORD 2 ... EVENT TRACE RECORD N This is more space efficient given that most trace records only include a subset of events. In modifying the systemtap simpletrace code, a 'begin' probe was added to emit the trace event header, so you no longer need to add '--no-header' when running simpletrace.py for systemtap generated trace files. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1475588159-30598-12-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-12simpletrace: add simpletrace.py --no-header optionStefan Hajnoczi1-7/+17
It can be useful to read simpletrace files that have no header. For example, a ring buffer may not have a header record but can still be processed if the user is sure the file format version is compatible. $ scripts/simpletrace.py --no-header trace-events trace-file Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-06-09simpletrace: add support for trace record pid fieldStefan Hajnoczi1-11/+15
Extract the pid field from the trace record and print it. Change the trace record tuple from: (event_num, timestamp, arg1, ..., arg6) to: (event_num, timestamp, pid, arg1, ..., arg6) Trace event methods now support 3 prototypes: 1. <event-name>(arg1, arg2, arg3) 2. <event-name>(timestamp, arg1, arg2, arg3) 3. <event-name>(timestamp, pid, arg1, arg2, arg3) Existing script continue to work without changes, they only know about prototypes 1 and 2. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-05-07trace: [tracetool] Minimize the amount of per-backend codeLluís Vilanova1-5/+1
Backends now only contain the essential backend-specific code, and most of the work is moved to frontend code. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-05-07trace: [simple] Bump up log version numberLluís Vilanova1-5/+5
The following tracetool cleanup changes the event numbering policy. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-08-15trace: Fix "Qemu" -> "QEMU"Stefan Weil1-1/+1
Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-19Update simpletrace.py for new log formatHarsh Prateek Bora1-41/+75
Support new tracelog format for multiple arguments and strings. Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-09-01simpletrace: fix process() argument countStefan Hajnoczi1-2/+2
The simpletrace.process() function invokes analyzer methods with the wrong number of arguments if a timestamp should be included. This patch fixes the issue so that trace analysis scripts can make use of timestamps. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-07simpletrace: Thread-safe tracingStefan Hajnoczi1-1/+2
Trace events outside the global mutex cannot be used with the simple trace backend since it is not thread-safe. There is no check to prevent them being enabled so people sometimes learn this the hard way. This patch restructures the simple trace backend with a ring buffer suitable for multiple concurrent writers. A writeout thread empties the trace buffer when threshold fill levels are reached. Should the writeout thread be unable to keep up with trace generation, records will simply be dropped. Each time events are dropped a special record is written to the trace file indicating how many events were dropped. The event ID is 0xfffffffffffffffe and its signature is dropped(uint32_t count). Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-03-06simpletrace: Make simpletrace.py a Python moduleStefan Hajnoczi1-33/+90
The simpletrace.py script pretty-prints a binary trace file. Most of the code can be reused by trace file analysis scripts, so turn it into a module. Here is an example script that uses the new simpletrace module: #!/usr/bin/env python # Print virtqueue elements that were never returned to the guest. import simpletrace class VirtqueueRequestTracker(simpletrace.Analyzer): def __init__(self): self.elems = set() def virtqueue_pop(self, vq, elem, in_num, out_num): self.elems.add(elem) def virtqueue_fill(self, vq, elem, length, idx): self.elems.remove(elem) def end(self): for elem in self.elems: print hex(elem) simpletrace.run(VirtqueueRequestTracker()) The simpletrace API is based around the Analyzer class. Users implement an analyzer subclass and add methods for trace events they want to process. A catchall() method is invoked for trace events which do not have dedicated methods. Finally, there are also begin() and end() methods like in sed that can be used to perform setup or print statistics at the end. A binary trace file is processed either with: simpletrace.run(analyzer) # uses command-line args or with: simpletrace.process('path/to/trace-events', 'path/to/trace-file', analyzer) Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-01-20Add scripts directoryBlue Swirl1-0/+93
Move build and user scripts into scripts directory. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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