On 16/12/2019 12:51, Chris Wilson wrote:
Quoting Tvrtko Ursulin (2019-12-16 12:07:01)
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Expose a list of clients with open file handles in sysfs.
This will be a basis for a top-like utility showing per-client and per-
engine GPU load.
Currently we only expose each client's pid and name under opaque numbered
directories in /sys/class/drm/card0/clients/.
For instance:
/sys/class/drm/card0/clients/3/name: Xorg
/sys/class/drm/card0/clients/3/pid: 5664
v2:
Chris Wilson:
* Enclose new members into dedicated structs.
* Protect against failed sysfs registration.
v3:
* sysfs_attr_init.
v4:
* Fix for internal clients.
v5:
* Use cyclic ida for client id. (Chris)
I think we are now in the age of xa_alloc_cyclic(). At least the
immediate benefit is that we don't have to worry about the ida locking.
Also spin locks and GFP_KERNEL in the current patch do not mix well. Use
with caution until I send the updated version out.
Regards,
Tvrtko
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