on my computer, cuMemGetInfo_v2() always return 201 (no context)

even though we just successfully created a context.
cuMemGetInfo() doesn't get this error.  So use it.
Note: I'm not sure if GetInfo() works for > 4GB;
my GPU is a bit less than 4GB

OpenCL: for generic devices, write FLOPS info to log file

Author: davidpanderson

client/gpu_detect.cpp

@@ -833,7 +833,7 @@ void COPROCS::bound_counts() {
 }
 
 void gpu_warning(vector<string> &warnings, const char* msg) {
-    fprintf(stderr, "[%s] %s\n", time_to_str(dtime()), msg);
+    fprintf(stderr, "[%s] %s\n", time_to_string(dtime()), msg);
     warnings.push_back(msg);
 }
 

client/gpu_nvidia.cpp

@@ -584,30 +584,31 @@ static void get_available_nvidia_ram(COPROC_NVIDIA &cc, vector<string>& warnings
     retval = (*p_cuDeviceGet)(&device, cc.device_num);
     if (retval) {
         snprintf(buf, sizeof(buf),
-            "[coproc] cuDeviceGet(%d) returned %d", cc.device_num, retval
+            "cuDeviceGet(%d) returned %d", cc.device_num, retval
         );
         gpu_warning(warnings, buf);
         return;
     }
     retval = (*p_cuCtxCreate)(&ctx, 0, device);
     if (retval) {
         snprintf(buf, sizeof(buf),
-            "[coproc] cuCtxCreate(%d) returned %d", cc.device_num, retval
+            "cuCtxCreate(%d) returned %d", cc.device_num, retval
         );
         gpu_warning(warnings, buf);
         return;
     }
-    if (p_cuMemGetInfo_v2) {
+    // cuMemGetInfo_v2() always returns 201 (no context)
+    if (false && p_cuMemGetInfo_v2) {
         retval = (*p_cuMemGetInfo_v2)(&memfree, &memtotal);
-    }
-    else {
+    } else {
         retval = (*p_cuMemGetInfo)(&memfree, &memtotal);
     }
+    snprintf(buf, sizeof(buf),
+        "cuMemGetInfo() returned %d; dev %d free %zu total %zu",
+        retval, cc.device_num, memfree, memtotal
+    );
+    gpu_warning(warnings, buf);
     if (retval) {
-        snprintf(buf, sizeof(buf),
-            "[coproc] cuMemGetInfo(%d) returned %d", cc.device_num, retval
-        );
-        gpu_warning(warnings, buf);
         (*p_cuCtxDestroy)(ctx);
         return;
     }

client/gpu_opencl.cpp

@@ -745,13 +745,15 @@ void COPROCS::get_opencl(
                     double freq = ((double)prop.max_clock_frequency) * MEGA;
                     prop.peak_flops = ((double)prop.max_compute_units) * freq;
                 }
+                char buf2[256];
+                snprintf(buf2, sizeof(buf2),
+                    "OpenCL generic: peak FLOPS %f; Max units %u, max freq %u MHz",
+					prop.peak_flops,
+                    prop.max_compute_units, prop.max_clock_frequency
+                );
+                gpu_warning(warnings, buf2);
                 if (prop.peak_flops <= 0 || prop.peak_flops > GPU_MAX_PEAK_FLOPS) {
-                    char buf2[256];
-                    snprintf(buf2, sizeof(buf2),
-                        "OpenCL generic: bad peak FLOPS; Max units %u, max freq %u MHz",
-                        prop.max_compute_units, prop.max_clock_frequency
-                    );
-                    gpu_warning(warnings, buf2);
+					gpu_warning(warnings, "bad peak flops value; using default");
                     prop.peak_flops = GPU_DEFAULT_PEAK_FLOPS;
                 }