[v0.30][AMD] Add support to fetch bus width, global memory and LDS size

We can use hsa_amd_agent_iterate_memory_pools to fetch info about GPU
memory pools in the GPU. HSA_AMD_SEGMENT_GROUP seems to be LDS, and
HSA_AMD_SEGMENT_GLOBAL seems to be global memory.

However, the latter is reported multiple times (I don't know why). The
only solution I found for this is to check for the
HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_EXTENDED_SCOPE_FINE_GRAINED flag, which
seems to be reported only once.

For bus width, we simply use HSA_AMD_AGENT_INFO_MEMORY_WIDTH.

src/common/gpu.cpp

@@ -101,6 +101,17 @@ char* get_str_bus_width(struct gpu_info* gpu) {
   return string;
 }
 
+char* get_str_lds_size(struct gpu_info* gpu) {
+  // TODO: Show XX KB (XX MB Total) like in cpufetch
+  uint32_t size = 3+1+3+1;
+  assert(strlen(STRING_UNKNOWN)+1 <= size);
+  char* string = (char *) ecalloc(size, sizeof(char));
+
+  sprintf(string, "%d KB", gpu->mem->lds_size / 1024);
+
+  return string;
+}
+
 char* get_str_memory_clock(struct gpu_info* gpu) {
   return get_freq_as_str_mhz(gpu->mem->freq);
 }

src/common/gpu.hpp

@@ -61,6 +61,7 @@ struct memory {
   int32_t bus_width;
   int32_t freq;
   int32_t clk_mul; // clock multiplier
+  int32_t lds_size; // HSA specific for now
 };
 
 struct gpu_info {
@@ -88,6 +89,7 @@ char* get_str_freq(struct gpu_info* gpu);
 char* get_str_memory_size(struct gpu_info* gpu);
 char* get_str_memory_type(struct gpu_info* gpu);
 char* get_str_bus_width(struct gpu_info* gpu);
+char* get_str_lds_size(struct gpu_info* gpu);
 char* get_str_memory_clock(struct gpu_info* gpu);
 char* get_str_l2(struct gpu_info* gpu);
 char* get_str_peak_performance(struct gpu_info* gpu);

src/common/printer.cpp

@@ -48,14 +48,15 @@ enum {
   ATTRIBUTE_FREQUENCY,     // ALL
   ATTRIBUTE_PEAK,          // ALL
   ATTRIBUTE_COMPUTE_UNITS, // HSA
+  ATTRIBUTE_LDS_SIZE,      // HSA
   ATTRIBUTE_STREAMINGMP,   // CUDA
   ATTRIBUTE_CORESPERMP,    // CUDA
   ATTRIBUTE_CUDA_CORES,    // CUDA
   ATTRIBUTE_TENSOR_CORES,  // CUDA
   ATTRIBUTE_L2,            // CUDA
-  ATTRIBUTE_MEMORY,        // CUDA
+  ATTRIBUTE_MEMORY,        // CUDA,HSA
   ATTRIBUTE_MEMORY_FREQ,   // CUDA
-  ATTRIBUTE_BUS_WIDTH,     // CUDA
+  ATTRIBUTE_BUS_WIDTH,     // CUDA,HSA
   ATTRIBUTE_PEAK_TENSOR,   // CUDA
   ATTRIBUTE_EUS,           // Intel
   ATTRIBUTE_GT,            // Intel
@@ -69,6 +70,7 @@ static const AttributeField ATTRIBUTE_INFO[] = {
   { ATTRIBUTE_FREQUENCY,     "Max Frequency:",          "Max Freq.:" },
   { ATTRIBUTE_PEAK,          "Peak Performance:",       "Peak Perf.:" },
   { ATTRIBUTE_COMPUTE_UNITS, "Compute Units (CUs):",    "CUs" },
+  { ATTRIBUTE_LDS_SIZE,      "LDS size:",               "LDS:" },
   { ATTRIBUTE_STREAMINGMP,   "SMs:",                    "SMs:" },
   { ATTRIBUTE_CORESPERMP,    "Cores/SM:",               "Cores/SM:" },
   { ATTRIBUTE_CUDA_CORES,    "CUDA Cores:",             "CUDA Cores:" },
@@ -487,6 +489,9 @@ bool print_gpufetch_amd(struct gpu_info* gpu, STYLE s, struct color** cs, struct
   char* manufacturing_process = get_str_process(gpu->arch);
   char* cus = get_str_cu(gpu);
   char* max_frequency = get_str_freq(gpu);
+  char* bus_width = get_str_bus_width(gpu);
+  char* mem_size = get_str_memory_size(gpu);
+  char* lds_size = get_str_lds_size(gpu);
 
   setAttribute(art, ATTRIBUTE_NAME, gpu_name);
   if (gpu_chip != NULL) {
@@ -496,6 +501,9 @@ bool print_gpufetch_amd(struct gpu_info* gpu, STYLE s, struct color** cs, struct
   setAttribute(art, ATTRIBUTE_TECHNOLOGY, manufacturing_process);
   setAttribute(art, ATTRIBUTE_FREQUENCY, max_frequency);
   setAttribute(art, ATTRIBUTE_COMPUTE_UNITS, cus);
+  setAttribute(art, ATTRIBUTE_LDS_SIZE, lds_size);
+  setAttribute(art, ATTRIBUTE_MEMORY, mem_size);
+  setAttribute(art, ATTRIBUTE_BUS_WIDTH, bus_width);
 
   bool use_short = false;
   uint32_t longest_attribute = longest_attribute_length(art, use_short);

src/hsa/hsa.cpp

@@ -23,6 +23,9 @@ struct agent_info {
   char device_mkt_name[64];
   uint32_t max_clock_freq;
   uint32_t compute_unit;
+  uint32_t bus_width;
+  uint32_t lds_size;
+  uint64_t global_size;
 };
 
 #define RET_IF_HSA_ERR(err) { \
@@ -40,6 +43,51 @@ struct agent_info {
   }                                                                           \
 }
 
+hsa_status_t memory_pool_callback(hsa_amd_memory_pool_t pool, void* data) {
+  struct agent_info* info = reinterpret_cast<struct agent_info *>(data);
+
+  hsa_amd_segment_t segment;
+  hsa_status_t err = hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_SEGMENT, &segment);
+  RET_IF_HSA_ERR(err);
+
+  if (segment == HSA_AMD_SEGMENT_GROUP) {
+    // LDS memory
+    // We want to make sure that this memory pool is not repeated.
+    if (info->lds_size != 0) {
+      printErr("Found HSA_AMD_SEGMENT_GROUP twice!");
+      return HSA_STATUS_ERROR;
+    }
+    uint32_t size = 0;
+
+    err = hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_SIZE, &size);
+    RET_IF_HSA_ERR(err);
+
+    info->lds_size = size;    
+  }
+  else if (segment == HSA_AMD_SEGMENT_GLOBAL) {
+    // Global memory
+    uint32_t global_flags = 0;
+    
+    err = hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_GLOBAL_FLAGS, &global_flags);
+    RET_IF_HSA_ERR(err);
+
+    if (global_flags & HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_EXTENDED_SCOPE_FINE_GRAINED) {
+      if (info->global_size != 0) {
+        printErr("Found HSA_AMD_MEMORY_POOL_GLOBAL_FLAG_EXTENDED_SCOPE_FINE_GRAINED twice!");
+        return HSA_STATUS_ERROR;
+      }
+
+      uint64_t size = 0;
+
+      err = hsa_amd_memory_pool_get_info(pool, HSA_AMD_MEMORY_POOL_INFO_SIZE, &size);
+      RET_IF_HSA_ERR(err);
+
+      info->global_size = size;
+    }    
+  }
+  return HSA_STATUS_SUCCESS;
+}
+
 hsa_status_t agent_callback(hsa_agent_t agent, void *data) {
   struct agent_info* info = reinterpret_cast<struct agent_info *>(data);
 
@@ -62,6 +110,17 @@ hsa_status_t agent_callback(hsa_agent_t agent, void *data) {
 
     err = hsa_agent_get_info(agent, (hsa_agent_info_t) HSA_AMD_AGENT_INFO_COMPUTE_UNIT_COUNT, &info->compute_unit);
     RET_IF_HSA_ERR(err);
+
+    // According to the documentation, this is deprecated. But what should I be using then?
+    err = hsa_agent_get_info(agent, (hsa_agent_info_t) HSA_AMD_AGENT_INFO_MEMORY_WIDTH, &info->bus_width);
+    RET_IF_HSA_ERR(err);
+
+    // We will check against zero to see if it was set beforehand.
+    info->global_size = 0;
+    info->lds_size = 0;
+    // This will fill global_size and lds_size.
+    err = hsa_amd_agent_iterate_memory_pools(agent, memory_pool_callback, data);
+    RET_IF_HSA_ERR(err);
   }
 
   return HSA_STATUS_SUCCESS;
@@ -75,6 +134,16 @@ struct topology_h* get_topology_info(struct agent_info info) {
   return topo;
 }
 
+struct memory* get_memory_info(struct gpu_info* gpu, struct agent_info info) {
+  struct memory* mem = (struct memory*) emalloc(sizeof(struct memory));
+  
+  mem->bus_width = info.bus_width;
+  mem->lds_size = info.lds_size;
+  mem->size_bytes = info.global_size;
+
+  return mem;
+}
+
 struct gpu_info* get_gpu_info_hsa(int gpu_idx) {
   struct gpu_info* gpu = (struct gpu_info*) emalloc(sizeof(struct gpu_info));
   gpu->pci = NULL;
@@ -118,6 +187,7 @@ struct gpu_info* get_gpu_info_hsa(int gpu_idx) {
   gpu->name = (char *) emalloc(sizeof(char) * (strlen(info.device_mkt_name) + 1));
   strcpy(gpu->name, info.device_mkt_name);
   gpu->arch = get_uarch_from_hsa(gpu, info.gpu_name);
+  gpu->mem = get_memory_info(gpu, info);
 
   if (gpu->arch == NULL) {
     return NULL;