In the xprof trace viewer, most of the LLO-related data is blank

[Prayer3th]

When performing a single-step dump during MaxText training, I used xprof to inspect the dumped data;however, the vast majority of the data within the LLO section appears blank. Is something going wrong?

Environment

libtpu==0.0.38.dev20260315+nightly
xprof==2.22.0
LIBTPU_INIT_ARGS="--xla_enable_custom_call_region_trace=true --xla_xprof_register_llo_debug_info=true"

[Matt-Hurd]

@Prayer3th Can you confirm if this is still occurring with profiles taken with the most recent libtpu version (0.0.38)?

[labyrinth-ssr]

Have you tried zoom in? there may be too much data to be rendered at one time.