GFX
Compute
SDMA
...
...
...
...
Kernel
Userspace
KernelQueue
Processes
A
B
C
GPU
wptr
rptr
A
A
A
A
A
A
B
B
B
C
C
IBc
C
B
B
B
C
C
IBb
rptr
wptr
wptr
rptr
rptr
wptr
wptr
rptr
PM41
PM42
PM4n
...
IBb
CP
RingBuffer
RingBuffer
RingBuffer
RingBuffer
RingBuffer
RingBuffer
RingBuffer
CP is capable offollowing theIB address.