With clang-15 we now get reported that in the make_flame_tree function,
neither the missing_count nor depth variables are used, only
incremenete/decremented. Remove these.
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add a second variant of the flame graph that shows records in terms of the
number of microseconds used by each call stack. This is a useful way of
seeing where time is going within the execution of U-Boot.
This requires a call stack that records the start time of each function,
as well as a way of subtracting all time consumed by child functions, so
that this time is not counted twice by the flamegraph. The time values in
the output are just for the function itself, not for its children.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is useful to see how many times each function is called, particularly
in the context of its callers. A flamegraph is a way of showing this.
Support output in this format which can be used by the flamegraph.pl
script, to generate an SVG image for browsing.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add support for writing ftrace records in the 'funcgraph' format, which
shows function entry and exit points as well as the time taken by each
function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Use the information in the trace header instead of reading it from the
trace records. Add debugging to check that System.map and the trace header
agree on this value.
Signed-off-by: Simon Glass <sjg@chromium.org>
The old text format is not much used anymore. Instead a new trace-cmd tool
has introduced a binary format for trace records.
Add support for generating this format. This involves removing the old
text format, adding various helpers for the new format and adjusting the
code to use an output file instead of stdout.
Signed-off-by: Simon Glass <sjg@chromium.org>
The current use of 'profile' in some places is confusing. Update the code
to use the word 'trace' consistently. Change the flags to better match
their meaning and add some more comments.
Signed-off-by: Simon Glass <sjg@chromium.org>
This now includes flags and the layout has changed slightly in recent
versions of Linux. Update the generator accordingly.
Signed-off-by: Simon Glass <sjg@chromium.org>
The flags in this tool don't match the comments or help. Also the variable
names are quite confusing. Update them for consistency.
Signed-off-by: Simon Glass <sjg@chromium.org>
We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.
Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.
This requires quite a few header-file additions.
Signed-off-by: Simon Glass <sjg@chromium.org>
There is no good reason to limit the trace buffer to 2GiB on a 64bit
system. Adjust the types of the relevant parameters.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
The read_trace_config() can dereference the line pointer after freeing
it on its error path. Avoid that.
This was found by Coverity Scan.
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Simon Glass <sjg@chromium.org>
This patch fixes cross-compiling U-Boot tools with the musl C library:
* including <sys/types.h> is needed for ulong
* defining _GNU_SOURCE is needed for loff_t
Tested for target at91sam9261ek_dataflash_cs3.
Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Cc: Tom Rini <trini@konsulko.com>
Remove non portable usage of REG_NOERROR.
BSD (like OS X) variants of regex.h do not declare REG_NOERROR, even GNU
regex(3) does not mention REG_NOERROR, just remove it.
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Acked-by: Jeroen Hofstee <jeroen@myspectrum.nl>
This tool provides the facility to decode U-Boot trace data and write out
a text file in Linux ftrace format for use with pytimechart.
Signed-off-by: Simon Glass <sjg@chromium.org>
