diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/hud/hud_cpu.c')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/hud/hud_cpu.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/hud/hud_cpu.c b/mesalib/src/gallium/auxiliary/hud/hud_cpu.c new file mode 100644 index 000000000..ce98115d5 --- /dev/null +++ b/mesalib/src/gallium/auxiliary/hud/hud_cpu.c @@ -0,0 +1,166 @@ +/************************************************************************** + * + * Copyright 2013 Marek Olšák <maraeo@gmail.com> + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/* This file contains code for reading CPU load for displaying on the HUD. + */ + +#include "hud/hud_private.h" +#include "os/os_time.h" +#include "util/u_memory.h" +#include <stdio.h> +#include <inttypes.h> + +static boolean +get_cpu_stats(unsigned cpu_index, uint64_t *busy_time, uint64_t *total_time) +{ + char cpuname[32]; + char line[1024]; + FILE *f; + + if (cpu_index == ALL_CPUS) + strcpy(cpuname, "cpu"); + else + sprintf(cpuname, "cpu%u", cpu_index); + + f = fopen("/proc/stat", "r"); + if (!f) + return FALSE; + + while (!feof(f) && fgets(line, sizeof(line), f)) { + if (strstr(line, cpuname) == line) { + uint64_t v[12]; + int i, num; + + num = sscanf(line, + "%s %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64 + " %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64" %"PRIu64 + " %"PRIu64" %"PRIu64"", + cpuname, &v[0], &v[1], &v[2], &v[3], &v[4], &v[5], + &v[6], &v[7], &v[8], &v[9], &v[10], &v[11]); + if (num < 5) { + fclose(f); + return FALSE; + } + + /* user + nice + system */ + *busy_time = v[0] + v[1] + v[2]; + *total_time = *busy_time; + + /* ... + idle + iowait + irq + softirq + ... */ + for (i = 3; i < num-1; i++) { + *total_time += v[i]; + } + fclose(f); + return TRUE; + } + } + fclose(f); + return FALSE; +} + +struct cpu_info { + unsigned cpu_index; + uint64_t last_cpu_busy, last_cpu_total, last_time; +}; + +static void +query_cpu_load(struct hud_graph *gr) +{ + struct cpu_info *info = gr->query_data; + uint64_t now = os_time_get(); + + if (info->last_time) { + if (info->last_time + gr->pane->period <= now) { + uint64_t cpu_busy, cpu_total, cpu_load; + + get_cpu_stats(info->cpu_index, &cpu_busy, &cpu_total); + + cpu_load = (cpu_busy - info->last_cpu_busy) * 100 / + (double)(cpu_total - info->last_cpu_total); + hud_graph_add_value(gr, cpu_load); + + info->last_cpu_busy = cpu_busy; + info->last_cpu_total = cpu_total; + info->last_time = now; + } + } + else { + /* initialize */ + info->last_time = now; + get_cpu_stats(info->cpu_index, &info->last_cpu_busy, + &info->last_cpu_total); + } +} + +void +hud_cpu_graph_install(struct hud_pane *pane, unsigned cpu_index) +{ + struct hud_graph *gr; + struct cpu_info *info; + uint64_t busy, total; + + /* see if the cpu exists */ + if (cpu_index != ALL_CPUS && !get_cpu_stats(cpu_index, &busy, &total)) { + return; + } + + gr = CALLOC_STRUCT(hud_graph); + if (!gr) + return; + + if (cpu_index == ALL_CPUS) + strcpy(gr->name, "cpu"); + else + sprintf(gr->name, "cpu%u", cpu_index); + + gr->query_data = CALLOC_STRUCT(cpu_info); + if (!gr->query_data) { + FREE(gr); + return; + } + + gr->query_new_value = query_cpu_load; + gr->free_query_data = free; + + info = gr->query_data; + info->cpu_index = cpu_index; + + hud_pane_add_graph(pane, gr); + hud_pane_set_max_value(pane, 100); +} + +int +hud_get_num_cpus(void) +{ + uint64_t busy, total; + int i = 0; + + while (get_cpu_stats(i, &busy, &total)) + i++; + + return i; +} |