2 Copyright 2018 Evgeny Naumov
4 Permission is hereby granted, free of charge, to any person obtaining a copy of
5 this software and associated documentation files (the "Software"), to deal in
6 the Software without restriction, including without limitation the rights to
7 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
8 of the Software, and to permit persons to whom the Software is furnished to do
9 so, subject to the following conditions:
11 The above copyright notice and this permission notice shall be included in all
12 copies or substantial portions of the Software.
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 #include "daemon/collectd.h"
24 #include "daemon/plugin.h"
25 #include "utils/common/common.h"
31 #define MAX_DEVNAME_LEN 256
32 #define PLUGIN_NAME "gpu_nvidia"
34 static nvmlReturn_t nv_status = NVML_SUCCESS;
35 static char *nv_errline = "";
37 #define TRY_CATCH(f, catch) \
38 if ((nv_status = f) != NVML_SUCCESS) { \
43 #define TRY_CATCH_OPTIONAL(f, catch) \
44 if ((nv_status = f) != NVML_SUCCESS && \
45 nv_status != NVML_ERROR_NOT_SUPPORTED) { \
50 #define TRY(f) TRY_CATCH(f, catch)
51 #define TRYOPT(f) TRY_CATCH_OPTIONAL(f, catch)
53 #define KEY_GPUINDEX "GPUIndex"
54 #define KEY_IGNORESELECTED "IgnoreSelected"
56 static const char *config_keys[] = {
60 static const unsigned int n_config_keys = STATIC_ARRAY_SIZE(config_keys);
62 // This is a bitflag, necessitating the (extremely conservative) assumption
63 // that there are no more than 64 GPUs on this system.
64 static uint64_t conf_match_mask = 0;
65 static bool conf_mask_is_exclude = 0;
67 static int nvml_config(const char *key, const char *value) {
69 if (strcasecmp(key, KEY_GPUINDEX) == 0) {
71 unsigned long device_ix = strtoul(value, &eptr, 10);
73 ERROR(PLUGIN_NAME ": Failed to parse GPUIndex value \"%s\"", value);
76 if (device_ix >= 64) {
78 ": At most 64 GPUs (0 <= GPUIndex < 64) are supported!");
81 conf_match_mask |= (1 << device_ix);
82 } else if (strcasecmp(key, KEY_IGNORESELECTED)) {
83 conf_mask_is_exclude = IS_TRUE(value);
85 ERROR(PLUGIN_NAME ": Unrecognized config option %s", key);
92 static int nvml_init(void) {
96 catch : ERROR(PLUGIN_NAME ": NVML init failed with %d", nv_status);
100 static int nvml_shutdown(void) {
104 catch : ERROR(PLUGIN_NAME ": NVML shutdown failed with %d", nv_status);
108 static void nvml_submit_gauge(const char *plugin_instance, const char *type,
109 const char *type_instance, gauge_t nvml) {
111 value_list_t vl = VALUE_LIST_INIT;
113 vl.values = &(value_t){.gauge = nvml};
116 sstrncpy(vl.plugin, PLUGIN_NAME, sizeof(vl.plugin));
117 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
119 sstrncpy(vl.type, type, sizeof(vl.type));
121 if (type_instance != NULL) {
122 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
125 plugin_dispatch_values(&vl);
128 static int nvml_read(void) {
130 unsigned int device_count;
131 TRY_CATCH(nvmlDeviceGetCount(&device_count), catch_nocount);
133 if (device_count > 64) {
137 for (unsigned int ix = 0; ix < device_count; ix++) {
139 unsigned int is_match =
140 ((1 << ix) & conf_match_mask) || (conf_match_mask == 0);
141 if (conf_mask_is_exclude == !!is_match) {
146 TRY(nvmlDeviceGetHandleByIndex(ix, &dev));
148 char dev_name[MAX_DEVNAME_LEN + 1] = {0};
149 TRY(nvmlDeviceGetName(dev, dev_name, sizeof(dev_name) - 1));
151 // Try to be as lenient as possible with the variety of devices that are
152 // out there, ignoring any NOT_SUPPORTED errors gently.
153 nvmlMemory_t meminfo;
154 TRYOPT(nvmlDeviceGetMemoryInfo(dev, &meminfo))
155 if (nv_status == NVML_SUCCESS) {
156 nvml_submit_gauge(dev_name, "memory", "used", meminfo.used);
157 nvml_submit_gauge(dev_name, "memory", "free", meminfo.free);
160 nvmlUtilization_t utilization;
161 TRYOPT(nvmlDeviceGetUtilizationRates(dev, &utilization))
162 if (nv_status == NVML_SUCCESS)
163 nvml_submit_gauge(dev_name, "percent", "gpu_used", utilization.gpu);
165 unsigned int fan_speed;
166 TRYOPT(nvmlDeviceGetFanSpeed(dev, &fan_speed))
167 if (nv_status == NVML_SUCCESS)
168 nvml_submit_gauge(dev_name, "fanspeed", NULL, fan_speed);
170 unsigned int core_temp;
171 TRYOPT(nvmlDeviceGetTemperature(dev, NVML_TEMPERATURE_GPU, &core_temp))
172 if (nv_status == NVML_SUCCESS)
173 nvml_submit_gauge(dev_name, "temperature", "core", core_temp);
175 unsigned int sm_clk_mhz;
176 TRYOPT(nvmlDeviceGetClockInfo(dev, NVML_CLOCK_SM, &sm_clk_mhz))
177 if (nv_status == NVML_SUCCESS)
178 nvml_submit_gauge(dev_name, "frequency", "multiprocessor",
181 unsigned int mem_clk_mhz;
182 TRYOPT(nvmlDeviceGetClockInfo(dev, NVML_CLOCK_MEM, &mem_clk_mhz))
183 if (nv_status == NVML_SUCCESS)
184 nvml_submit_gauge(dev_name, "frequency", "memory", 1e6 * mem_clk_mhz);
186 unsigned int power_mW;
187 TRYOPT(nvmlDeviceGetPowerUsage(dev, &power_mW))
188 if (nv_status == NVML_SUCCESS)
189 nvml_submit_gauge(dev_name, "power", NULL, 1e-3 * power_mW);
193 // Failures here indicate transient errors or removal of GPU. In either
194 // case it will either be resolved or the GPU will no longer be enumerated
195 // the next time round.
196 catch : WARNING(PLUGIN_NAME
197 ": NVML call \"%s\" failed (%d) on dev at index %d!",
198 nv_errline, nv_status, ix);
204 // Failures here indicate serious misconfiguration; we bail out totally.
206 ERROR(PLUGIN_NAME ": Failed to enumerate NVIDIA GPUs (\"%s\" returned %d)",
207 nv_errline, nv_status);
211 void module_register(void) {
212 plugin_register_init(PLUGIN_NAME, nvml_init);
213 plugin_register_config(PLUGIN_NAME, nvml_config, config_keys, n_config_keys);
214 plugin_register_read(PLUGIN_NAME, nvml_read);
215 plugin_register_shutdown(PLUGIN_NAME, nvml_shutdown);