directx 12 – read and increase global counter in compute shader in directx12

there is UAV BufferA and ComputeShaderA
every time ComputeShaderA gets dispatch()ed it will write into a different section of BufferA like

                                          //BufferA size = 3MB
commandlist->dipatch(1024,0,0);           //modifies 1st 1MB of BufferA
commandlist->ResourceBarrier(1, &brrUAV);
commandlist->dipatch(1024,0,0);           //modifies 2nd 1MB of BufferA
commandlist->ResourceBarrier(1, &brrUAV);
commandlist->dipatch(1024,0,0);           //modifies 3rd 1MB of BufferA

so ComputeShaderA reads one float in GPU memory that represents a Counter
I created another ComputeShaderB that increases that Counter and runs every time ComputeShaderA finishes
but having to run two shaders is slow, is there a way for ComputeShaderA to read and increase Counter without data race? which will make ComputeShaderB useless