kfdtest: Make queue evict tests use constant number of wavefronts.

Previously, KFDEvictTest.QueueTest and KFDSVMEvictTest.QueueTest
would create a variable number of wavefronts, one for each 64MB
of memory under test. This ran into limits on the buffers used
by the wavefronts, and may at some point have exceeded the
wavefront limit.

Restrict the number of wavefronts to 512, and adjust the shader
to accomodate a variable buffer size

Signed-off-by: David Francis <David.Francis@amd.com>
Change-Id: I2ec292e2900e2efa62a08313bca3d2f4bdabca8b

tests/kfdtest/src/ShaderStore.cpp

@@ -523,6 +523,7 @@ const char *PersistentIterateIsa = SHADER_MACROS R"(
  *   v[2:3] - address of corresponding local buf address offset: s[0:1] + v0 * 8
  *   v[4:5] - corresponding output buf address: s[2:3] + v0 * 4
  *   v[6:7] - local buf address used for read test
+ *   v11 - size of local buffer in MB
  */
 const char *ReadMemoryIsa = SHADER_MACROS R"(
         // Compute address of corresponding output buffer
@@ -538,6 +539,13 @@ const char *ReadMemoryIsa = SHADER_MACROS R"(
         v_mov_b32               v3, s1          // v[2:3] = s[0:1] + v0 * 8
         V_ADD_CO_CI_U32         v3, v3, 0       // v[2:3] = s[0:1] + v0 * 8
 
+        //Load local buffer size from output buffer
+        .if (.amdgcn.gfx_generation_number == 9 && .amdgcn.gfx_generation_minor == 4 && .amdgcn.gfx_generation_stepping == 0)
+            flat_load_dword       v11, v[4:5] nt sc1 sc0
+        .else
+            flat_load_dword       v11, v[4:5] slc
+        .endif
+
         // Load 64bit local buffer address stored at v[2:3] to v[6:7]
         .if (.amdgcn.gfx_generation_number == 9 && .amdgcn.gfx_generation_minor == 4 && .amdgcn.gfx_generation_stepping == 0)
             flat_load_dwordx2       v[6:7], v[2:3] nt sc1 sc0
@@ -553,11 +561,10 @@ const char *ReadMemoryIsa = SHADER_MACROS R"(
         s_cmp_eq_i32            s16, s8
         s_cbranch_scc1          L_QUIT          // if notified to quit by host
 
-        // Loop read 64M local buffer starting at v[6:7]
+        // Loop read local buffer starting at v[6:7]
         // every 4k page only read once
         v_mov_b32               v9, 0
         v_mov_b32               v10, 0x1000     // 4k page
-        v_mov_b32               v11, 0x4000000  // 64M size
         v_mov_b32               v12, v6
         v_mov_b32               v13, v7
         L_LOOP_READ: