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788b4609db
When converting a U-Boot trace records file to ftrace function graph
format for use by trace-cmd ('proftool -f funcgraph dump-ftrace'), the
time associated to each function is incorrectly saved in microseconds
instead of nanoseconds. Multuply the value by 1000 to fix the issue.
With this change, the trace-cmd output looks consistent. Here is an
example with udelay(25) added to mem_malloc_init() as a test case:
$ ./tools/proftool -m System.map -t /tmp/trace.bin -f funcgraph \
dump-ftrace -o /tmp/trace.dat
$ trace-cmd report /tmp/trace.dat >/tmp/trace.log
$ vi /tmp/trace.log
[...]
u-boot-1 [000] 6.719659: funcgraph_entry: | mem_malloc_init() {
u-boot-1 [000] 6.719659: funcgraph_entry: | udelay() {
u-boot-1 [000] 6.719660: funcgraph_entry: | schedule() {
u-boot-1 [000] 6.719660: funcgraph_entry: | cyclic_run() {
u-boot-1 [000] 6.719660: funcgraph_entry: 1.000 us | cyclic_get_list();
u-boot-1 [000] 6.719661: funcgraph_exit: 1.000 us | }
u-boot-1 [000] 6.719661: funcgraph_exit: 1.000 us | }
u-boot-1 [000] 6.719661: funcgraph_entry: | __udelay() {
u-boot-1 [000] 6.719662: funcgraph_entry: 0.000 us | usec_to_tick();
u-boot-1 [000] 6.719687: funcgraph_exit: + 26.000 us | }
u-boot-1 [000] 6.719687: funcgraph_exit: + 28.000 us | }
u-boot-1 [000] 6.719687: funcgraph_entry: # 37971.000 us | memset();
u-boot-1 [000] 6.757658: funcgraph_exit: # 37999.000 us | }
u-boot-1 [000] 6.757658: funcgraph_exit: # 38000.000 us | }
In the above dump, the udelay() call is reported as taking 26 us which
is consistent with the timestamps (6.719687 - 6.719659 = 0.000026).
Without this patch we would have "0.026 us" instead of "+ 26.000 us".
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>