[RFC PATCH 0/3] add ttm trace event support

[Christian König]

Not a bad start, but that needs quite some more work.

First of all please rebase on top of current drm-misc-next, a whole 
bunch of the stuff you want to trace here was already removed or is 
about to be removed.

Then concentrate on the necessary trace points, for example 
ttm:ttm_bo_device_init/release are overkill.

On the other hand I'm missing important events like pool shrink, tt 
swapout/swapin (ttm_bo_swapout can be dropped) and especially BO init.

I would separate the patches into one for each trace point. Not a must 
have, but it could make it easier to review and we can discuss for each 
one separately.

Thanks,
Christian.

Am 28.01.21 um 08:13 schrieb Kevin Wang:
> the kernel ftrace can better help analyze the kernel running status.
> add some trace events to support TTM.
>
> add trace events list:
>
> ttm:ttm_bo_add_mem_to_lru
> ttm:ttm_bo_del_from_lru
> ttm:ttm_bo_move_mem
> ttm:ttm_bo_wait
> ttm:ttm_bo_evict
> ttm:ttm_bo_swapout
> ttm:ttm_bo_device_init
> ttm:ttm_bo_device_release
> ttm:ttm_bo_init_reserved
> ttm:ttm_bo_validate
> ttm:ttm_bo_release
> ttm:ttm_bo_mmap
> ttm:ttm_bo_vm_fault
> ttm:ttm_bo_vm_access
> ttm:ttm_shrink
> ttm:ttm_mem_global_reserve
> ttm:ttm_mem_global_free
>
> Kevin Wang (3):
>    drm/ttm: add ttm bo trace event support
>    drm/ttm: add ttm vm bo trace event support
>    drm/ttm: add ttm mem trace event support
>
>   drivers/gpu/drm/ttm/ttm_bo.c     |  23 ++
>   drivers/gpu/drm/ttm/ttm_bo_vm.c  |  12 +-
>   drivers/gpu/drm/ttm/ttm_memory.c |   7 +
>   drivers/gpu/drm/ttm/ttm_module.c |   3 +
>   drivers/gpu/drm/ttm/ttm_trace.h  | 469 +++++++++++++++++++++++++++++++
>   5 files changed, 512 insertions(+), 2 deletions(-)
>   create mode 100644 drivers/gpu/drm/ttm/ttm_trace.h
>