riscv/qemu - qemu - Gitea: Git with a cup of tea

Commit Graph

Author	SHA1	Message	Date
Stefan Hajnoczi	15327c3df0	simpletrace: add simpletrace.py --no-header option 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>	12 years ago
Stefan Hajnoczi	80ff35cd3f	simpletrace: add support for trace record pid field 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>	12 years ago
Lluís Vilanova	1dad2ce973	trace: [tracetool] Minimize the amount of per-backend code 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>	12 years ago
Lluís Vilanova	ef0bd3bba6	trace: [simple] Bump up log version number 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>	12 years ago
Stefan Weil	eda5edd12d	trace: Fix "Qemu" -> "QEMU" Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>	14 years ago
Harsh Prateek Bora	90a147a275	Update simpletrace.py for new log format 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>	14 years ago
Stefan Hajnoczi	d8e8ef4ee0	simpletrace: fix process() argument count 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>	15 years ago
Stefan Hajnoczi	0b5538c300	simpletrace: Thread-safe tracing 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>	15 years ago
Stefan Hajnoczi	59da668492	simpletrace: Make simpletrace.py a Python module 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>	15 years ago
Blue Swirl	4c3b5a4891	Add scripts directory Move build and user scripts into scripts directory. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>	15 years ago
Stefan Hajnoczi	6df40080b0	trace: Relax trace-events parsing regex in simpletrace.py The regular expression to parse trace event definitions assumed the format string would be a simple double-quoted string. However, we now use PRI?64 for portability which splits string literals. The regular expression can disregard the format string entirely since simpletrace.py never needs to use it. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>	16 years ago
Stefan Hajnoczi	26f7227bfe	trace: Add simple built-in tracing backend This patch adds a simple tracer which produces binary trace files. To try out the simple backend: $ ./configure --trace-backend=simple $ make After running QEMU you can pretty-print the trace: $ ./simpletrace.py trace-events trace.log The output of simpletrace.py looks like this: qemu_realloc 0.699 ptr=0x24363f0 size=0x3 newptr=0x24363f0 qemu_free 0.768 ptr=0x24363f0 ^ ^---- timestamp delta (us) \|____ trace event name Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Make trace record fields 64-bit Explicitly use 64-bit fields in trace records so that timestamps and magic numbers work for 32-bit host builds. Includes fixes from Prerna Saxena <prerna@linux.vnet.ibm.com>. Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>	16 years ago

10 Commits (faecd40a592dbd8f12d2b3b4783fa05ae22364ea)