src/gallium/auxiliary/hud/hud_cpu.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2013 Marek Olšák <maraeo@gmail.com>
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /* This file contains code for reading CPU load for displaying on the HUD.
  29  */
  30
  31 #include "hud/hud_private.h"
  32 #include "os/os_time.h"
  33 #include "os/os_thread.h"
  34 #include "util/u_memory.h"
  35 #include <stdio.h>
  36 #include <inttypes.h>
  37 #ifdef PIPE_OS_WINDOWS
  38 #include <windows.h>
  39 #endif
  40
  41
  42 #ifdef PIPE_OS_WINDOWS
  43
  44 static inline uint64_t
  45 filetime_to_scalar(FILETIME ft)
  46 {
  47    ULARGE_INTEGER uli;
  48    uli.LowPart = ft.dwLowDateTime;
  49    uli.HighPart = ft.dwHighDateTime;
  50    return uli.QuadPart;
  51 }
  52
  53 static boolean
  54 get_cpu_stats(unsigned cpu_index, uint64_t *busy_time, uint64_t *total_time)
  55 {
  56    SYSTEM_INFO sysInfo;
  57    FILETIME ftNow, ftCreation, ftExit, ftKernel, ftUser;
  58
  59    GetSystemInfo(&sysInfo);
  60    assert(sysInfo.dwNumberOfProcessors >= 1);
  61    if (cpu_index != ALL_CPUS && cpu_index >= sysInfo.dwNumberOfProcessors) {
  62       /* Tell hud_get_num_cpus there are only this many CPUs. */
  63       return FALSE;
  64    }
  65
  66    /* Get accumulated user and sys time for all threads */
  67    if (!GetProcessTimes(GetCurrentProcess(), &ftCreation, &ftExit,
  68                         &ftKernel, &ftUser))
  69       return FALSE;
  70
  71    GetSystemTimeAsFileTime(&ftNow);
  72
  73    *busy_time = filetime_to_scalar(ftUser) + filetime_to_scalar(ftKernel);
  74    *total_time = filetime_to_scalar(ftNow) - filetime_to_scalar(ftCreation);
  75
  76    /* busy_time already has the time accross all cpus.
  77     * XXX: if we want 100% to mean one CPU, 200% two cpus, eliminate the
  78     * following line.
  79     */
  80    *total_time *= sysInfo.dwNumberOfProcessors;
  81
  82    /* XXX: we ignore cpu_index, i.e, we assume that the individual CPU usage
  83     * and the system usage are one and the same.
  84     */
  85    return TRUE;
  86 }
  87
  88 #else
  89
  90 static boolean
  91 get_cpu_stats(unsigned cpu_index, uint64_t *busy_time, uint64_t *total_time)
  92 {
  93    char cpuname[32];
  94    char line[1024];
  95    FILE *f;
  96
  97    if (cpu_index == ALL_CPUS)
  98       strcpy(cpuname, "cpu");
  99    else
 100       sprintf(cpuname, "cpu%u", cpu_index);
 101
 102    f = fopen("/proc/stat", "r");
 103    if (!f)
 104       return FALSE;
 105
 106    while (!feof(f) && fgets(line, sizeof(line), f)) {
 107       if (strstr(line, cpuname) == line) {
 108          uint64_t v[12];
 109          int i, num;
 110
 111          num = sscanf(line,
 112                       "%s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64
 113                       " %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64
 114                       " %"PRIu64" %"PRIu64"",
 115                       cpuname, &v[0], &v[1], &v[2], &v[3], &v[4], &v[5],
 116                       &v[6], &v[7], &v[8], &v[9], &v[10], &v[11]);
 117          if (num < 5) {
 118             fclose(f);
 119             return FALSE;
 120          }
 121
 122          /* user + nice + system */
 123          *busy_time = v[0] + v[1] + v[2];
 124          *total_time = *busy_time;
 125
 126          /* ... + idle + iowait + irq + softirq + ...  */
 127          for (i = 3; i < num-1; i++) {
 128             *total_time += v[i];
 129          }
 130          fclose(f);
 131          return TRUE;
 132       }
 133    }
 134    fclose(f);
 135    return FALSE;
 136 }
 137 #endif
 138
 139
 140 struct cpu_info {
 141    unsigned cpu_index;
 142    uint64_t last_cpu_busy, last_cpu_total, last_time;
 143 };
 144
 145 static void
 146 query_cpu_load(struct hud_graph *gr)
 147 {
 148    struct cpu_info *info = gr->query_data;
 149    uint64_t now = os_time_get();
 150
 151    if (info->last_time) {
 152       if (info->last_time + gr->pane->period <= now) {
 153          uint64_t cpu_busy, cpu_total, cpu_load;
 154
 155          get_cpu_stats(info->cpu_index, &cpu_busy, &cpu_total);
 156
 157          cpu_load = (cpu_busy - info->last_cpu_busy) * 100 /
 158                     (double)(cpu_total - info->last_cpu_total);
 159          hud_graph_add_value(gr, cpu_load);
 160
 161          info->last_cpu_busy = cpu_busy;
 162          info->last_cpu_total = cpu_total;
 163          info->last_time = now;
 164       }
 165    }
 166    else {
 167       /* initialize */
 168       info->last_time = now;
 169       get_cpu_stats(info->cpu_index, &info->last_cpu_busy,
 170                     &info->last_cpu_total);
 171    }
 172 }
 173
 174 static void
 175 free_query_data(void *p)
 176 {
 177    FREE(p);
 178 }
 179
 180 void
 181 hud_cpu_graph_install(struct hud_pane *pane, unsigned cpu_index)
 182 {
 183    struct hud_graph *gr;
 184    struct cpu_info *info;
 185    uint64_t busy, total;
 186
 187    /* see if the cpu exists */
 188    if (cpu_index != ALL_CPUS && !get_cpu_stats(cpu_index, &busy, &total)) {
 189       return;
 190    }
 191
 192    gr = CALLOC_STRUCT(hud_graph);
 193    if (!gr)
 194       return;
 195
 196    if (cpu_index == ALL_CPUS)
 197       strcpy(gr->name, "cpu");
 198    else
 199       sprintf(gr->name, "cpu%u", cpu_index);
 200
 201    gr->query_data = CALLOC_STRUCT(cpu_info);
 202    if (!gr->query_data) {
 203       FREE(gr);
 204       return;
 205    }
 206
 207    gr->query_new_value = query_cpu_load;
 208
 209    /* Don't use free() as our callback as that messes up Gallium's
 210     * memory debugger.  Use simple free_query_data() wrapper.
 211     */
 212    gr->free_query_data = free_query_data;
 213
 214    info = gr->query_data;
 215    info->cpu_index = cpu_index;
 216
 217    hud_pane_add_graph(pane, gr);
 218    hud_pane_set_max_value(pane, 100);
 219 }
 220
 221 int
 222 hud_get_num_cpus(void)
 223 {
 224    uint64_t busy, total;
 225    int i = 0;
 226
 227    while (get_cpu_stats(i, &busy, &total))
 228       i++;
 229
 230    return i;
 231 }
 232
 233 struct thread_info {
 234    int64_t last_time;
 235    int64_t last_thread_time;
 236 };
 237
 238 static void
 239 query_api_thread_busy_status(struct hud_graph *gr)
 240 {
 241    struct thread_info *info = gr->query_data;
 242    int64_t now = os_time_get_nano();
 243
 244    if (info->last_time) {
 245       if (info->last_time + gr->pane->period*1000 <= now) {
 246          int64_t thread_now = pipe_current_thread_get_time_nano();
 247
 248          hud_graph_add_value(gr,
 249                              (thread_now - info->last_thread_time) * 100 /
 250                              (now - info->last_time));
 251
 252          info->last_thread_time = thread_now;
 253          info->last_time = now;
 254       }
 255    } else {
 256       /* initialize */
 257       info->last_time = now;
 258       info->last_thread_time = pipe_current_thread_get_time_nano();
 259    }
 260 }
 261
 262 void
 263 hud_api_thread_busy_install(struct hud_pane *pane)
 264 {
 265    struct hud_graph *gr;
 266
 267    gr = CALLOC_STRUCT(hud_graph);
 268    if (!gr)
 269       return;
 270
 271    strcpy(gr->name, "API-thread-busy");
 272
 273    gr->query_data = CALLOC_STRUCT(thread_info);
 274    if (!gr->query_data) {
 275       FREE(gr);
 276       return;
 277    }
 278
 279    gr->query_new_value = query_api_thread_busy_status;
 280
 281    /* Don't use free() as our callback as that messes up Gallium's
 282     * memory debugger.  Use simple free_query_data() wrapper.
 283     */
 284    gr->free_query_data = free_query_data;
 285
 286    hud_pane_add_graph(pane, gr);
 287    hud_pane_set_max_value(pane, 100);
 288 }