change hipEnvVarDriver to reduce communications to hipEnvVar

Change-Id: I65a5f67dd51d53594fa51f88505e32321643d189


[ROCm/clr commit: e6d7ecc0f5]

projects/clr/hipamd/tests/src/hipEnvVarDriver.cpp

@@ -27,13 +27,9 @@ THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
 #include <stdlib.h>
 #include <assert.h>
 #include <string>
-
+#include <hip_runtime.h>
 using namespace std;
 
-//./hipEnvVar -c -d 0 -h
-  //putenv("SomeVariable=SomeValue");
- //putenv("export HIP_VISIBLE_DEVICES=0,1,2,3");
-
 int getDeviceNumber(){
    FILE *in;
    char buff[512];
@@ -46,7 +42,8 @@ int getDeviceNumber(){
     return atoi(buff);
 }
 
-int getDevicePCIBusNum(int deviceID){
+// Query the current device ID remotely to hipEnvVar
+int getDevicePCIBusNumRemote(int deviceID){
     FILE *in;
     char buff[512];
     string str = "./hipEnvVar -d ";
@@ -59,6 +56,19 @@ int getDevicePCIBusNum(int deviceID){
     return atoi(buff);
 }
 
+// Query the current device ID locally
+int getDevicePCIBusNum(int deviceID){
+    hipSetDevice(deviceID);
+    hipDeviceProp_t devProp;
+
+    hipGetDeviceProperties(&devProp, deviceID);
+    if (devProp.major < 1) {
+        printf("%d does not support HIP\n", deviceID);
+        return -1;
+    }
+    return devProp.pciBusID;
+}
+
 int main() {
     unsetenv("HIP_VISIBLE_DEVICES");
     unsetenv("CUDA_VISIBLE_DEVICES");
@@ -78,11 +88,9 @@ int main() {
     for (int i = 0; i < totalDeviceNum ; i++) {
         setenv("HIP_VISIBLE_DEVICES",(char*)std::to_string(i).c_str(),1);
         setenv("CUDA_VISIBLE_DEVICES",(char*)std::to_string(i).c_str(),1);
-        //cout<<"HIP_VISIBLE_DEVICES is "<<i<<" data in vector is "<<devPCINum[i]<<endl;
-        //std::cout <<"Returned pci number is"<< getDevicePCIBusNum(0) << std::endl;
-        if (devPCINum[i] != getDevicePCIBusNum(0)) {
-            std::cout << "The returned PciBusID is not correct"
-                << std::endl;
+        if (devPCINum[i] != getDevicePCIBusNumRemote(0)) {
+            std::cout << "The returned PciBusID is not correct"<< std::endl;
+            std::cout << "Expected "<< devPCINum[i] << ", but get " << getDevicePCIBusNum << endl;
             exit(-1);
         } else {
             continue;