diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2020-07-24 15:54:31 +0300 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2020-12-02 23:35:58 +0000 |
| commit | 8c99c27df10f6c5a120e41ffb0948e357f5a2d20 (patch) | |
| tree | 710940c338b8b2a3ddebab60faf7856725ca37e2 /util/genprof/README | |
| parent | 5e053af7a677d0c1f98e624057ba7409f8492596 (diff) | |
lib/trace: Remove TRACE support
Looks like the option is generally not compatible with
garbage collections.
Nothing gets inlined, for example is_smp_boot() no longer
evaluates to constant false and thus the symbols from
secondary.S would need to be present for the build to pass
even if we set SMP=n.
Also the addresses of relocatable ramstage are currently
not normalised on the logs, so util/genprof would be unable
dress those.
Change-Id: I0b6f310e15e6f4992cd054d288903fea8390e5cf
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45757
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'util/genprof/README')
| -rw-r--r-- | util/genprof/README | 31 |
1 files changed, 0 insertions, 31 deletions
diff --git a/util/genprof/README b/util/genprof/README deleted file mode 100644 index d4159c2fd6..0000000000 --- a/util/genprof/README +++ /dev/null @@ -1,31 +0,0 @@ -Function tracing ----------------- - -Enable CONFIG_TRACE in debug menu. Run the compiled image on target. You will get -a log with a lot of lines like: - -... -~0x001072e8(0x00100099) -~0x00108bc0(0x0010730a) -... - -First address is address of function which was just entered, the second address -is address of functions which call that. - -You can use the log2dress to dress the log again: - -... -src/arch/x86/lib/c_start.S:85 calls /home/ruik/coreboot/src/boot/selfboot.c:367 -/home/ruik/coreboot/src/boot/selfboot.c:370 calls /home/ruik/coreboot/src/device/device.c:325 -... - -Alternatively, you can use genprof to generate a gmon.out file, which can be used -by gprof to show the call traces. You will need to install uthash library to compile -that. - -Great use is: - -make -./genprof /tmp/yourlog ; gprof ../../build/ramstage | ./gprof2dot.py -e0 -n0 | dot -Tpng -o output.png - -Which generates a PNG with a call graph. |