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/common.h"
25 #include "daemon/plugin.h"
31 #define MAX_DEVNAME_LEN 256
32 #define PLUGIN_NAME "gpu_nvml"
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) {
71 if (strcasecmp(key, KEY_GPUINDEX) == 0) {
72 unsigned long device_ix = strtoul(value, &eptr, 10);
74 ERROR(PLUGIN_NAME ": Failed to parse GPUIndex value \"%s\"", value);
77 if (device_ix >= 64) {
79 ": At most 64 GPUs (0 <= GPUIndex < 64) are supported!");
82 conf_match_mask |= (1 << device_ix);
83 } else if (strcasecmp(key, KEY_IGNORESELECTED)) {
84 conf_mask_is_exclude = IS_TRUE(value);
86 ERROR(PLUGIN_NAME ": Unrecognized config option %s", key);
93 static int nvml_init(void) {
97 catch : ERROR(PLUGIN_NAME ": NVML init failed with %d", nv_status);
101 static int nvml_shutdown(void) {
105 catch : ERROR(PLUGIN_NAME ": NVML shutdown failed with %d", nv_status);
109 static void nvml_submit(const char *plugin_instance, const char *type,
110 const char *type_instance, gauge_t nvml) {
112 value_list_t vl = VALUE_LIST_INIT;
114 vl.values = &(value_t){.gauge = nvml};
117 sstrncpy(vl.plugin, PLUGIN_NAME, sizeof(vl.plugin));
118 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
120 sstrncpy(vl.type, type, sizeof(vl.type));
122 if (type_instance != NULL) {
123 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
126 plugin_dispatch_values(&vl);
129 static int nvml_read(void) {
131 unsigned int device_count;
132 TRY_CATCH(nvmlDeviceGetCount(&device_count), catch_nocount);
134 if (device_count > 64) {
138 for (unsigned int ix = 0; ix < device_count; ix++) {
140 unsigned int is_match =
141 ((1 << ix) & conf_match_mask) || (conf_match_mask == 0);
142 if (conf_mask_is_exclude == !!is_match) {
147 TRY(nvmlDeviceGetHandleByIndex(ix, &dev));
149 char dev_name[MAX_DEVNAME_LEN + 1] = {0};
150 TRY(nvmlDeviceGetName(dev, dev_name, sizeof(dev_name) - 1));
152 // Try to be as lenient as possible with the variety of devices that are
153 // out there, ignoring any NOT_SUPPORTED errors gently.
154 nvmlMemory_t meminfo;
155 TRYOPT(nvmlDeviceGetMemoryInfo(dev, &meminfo))
156 if (nv_status == NVML_SUCCESS) {
157 nvml_submit(dev_name, "memory", "used", meminfo.used);
158 nvml_submit(dev_name, "memory", "free", meminfo.free);
161 nvmlUtilization_t utilization;
162 TRYOPT(nvmlDeviceGetUtilizationRates(dev, &utilization))
163 if (nv_status == NVML_SUCCESS)
164 nvml_submit(dev_name, "percent", "gpu_used", utilization.gpu);
166 unsigned int fan_speed;
167 TRYOPT(nvmlDeviceGetFanSpeed(dev, &fan_speed))
168 if (nv_status == NVML_SUCCESS)
169 nvml_submit(dev_name, "fanspeed", NULL, fan_speed);
171 unsigned int core_temp;
172 TRYOPT(nvmlDeviceGetTemperature(dev, NVML_TEMPERATURE_GPU, &core_temp))
173 if (nv_status == NVML_SUCCESS)
174 nvml_submit(dev_name, "temperature", "core", core_temp);
176 unsigned int sm_clk_mhz;
177 TRYOPT(nvmlDeviceGetClockInfo(dev, NVML_CLOCK_SM, &sm_clk_mhz))
178 if (nv_status == NVML_SUCCESS)
179 nvml_submit(dev_name, "frequency", "sm", 1e6 * sm_clk_mhz);
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(dev_name, "frequency", "mem", 1e6 * mem_clk_mhz);
186 unsigned int power_mW;
187 TRYOPT(nvmlDeviceGetPowerUsage(dev, &power_mW))
188 if (nv_status == NVML_SUCCESS)
189 nvml_submit(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);