[openmp][plugin] Dot on mi2xx swdev-571101 (#785)

Author: ronlieb

offload/plugins-nextgen/amdgpu/src/rtl.cpp

@@ -5110,16 +5110,16 @@ struct AMDGPUDeviceTy : public GenericDeviceTy, AMDGenericDeviceTy {
 
   static inline const std::unordered_map<std::string, DeviceEnvarConfigTy>
       EnvarConfigs = {{"MI210", {.OMPX_UseMultipleSdmaEngines = true,
-                                 .OMPX_XteamBlockSize = 256,
+                                 .OMPX_XteamBlockSize = 512,
                                  .OMPX_XTeamReductionOccupancyBasedOpt = true,
                                  .OMPX_AdjustNumTeamsForXteamRedSmallBlockSize=0}},
                       {"MI250X",{.OMPX_UseMultipleSdmaEngines = true,
-                                 .OMPX_XteamBlockSize = 256,
+                                 .OMPX_XteamBlockSize = 512,
                                  .OMPX_XTeamReductionOccupancyBasedOpt = true,
                                  .OMPX_AdjustNumTeamsForXteamRedSmallBlockSize=0}},
                       {"MI250X/MI250",{
                                  .OMPX_UseMultipleSdmaEngines = true,
-                                 .OMPX_XteamBlockSize = 256,
+                                 .OMPX_XteamBlockSize = 512,
                                  .OMPX_XTeamReductionOccupancyBasedOpt = true,
                                  .OMPX_AdjustNumTeamsForXteamRedSmallBlockSize=0}},
                       {"MI300A", {.OMPX_UseMultipleSdmaEngines = false,