/************************************************************************** * * Copyright (C) 2016 Steven Toth * Copyright (C) 2016 Zodiac Inflight Innovations * 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. * **************************************************************************/ #if HAVE_GALLIUM_EXTRA_HUD /* Purpose: Reading /sys/block/<*>/stat MB/s read/write throughput per second, * displaying on the HUD. */ #include "hud/hud_private.h" #include "util/list.h" #include "os/os_time.h" #include "os/os_thread.h" #include "util/u_memory.h" #include #include #include #include #include #include #include #include #include struct stat_s { /* Read */ uint64_t r_ios; uint64_t r_merges; uint64_t r_sectors; uint64_t r_ticks; /* Write */ uint64_t w_ios; uint64_t w_merges; uint64_t w_sectors; uint64_t w_ticks; /* Misc */ uint64_t in_flight; uint64_t io_ticks; uint64_t time_in_queue; }; struct diskstat_info { struct list_head list; int mode; /* DISKSTAT_RD, DISKSTAT_WR */ char name[64]; /* EG. sda5 */ char sysfs_filename[128]; uint64_t last_time; struct stat_s last_stat; }; /* TODO: We don't handle dynamic block device / partition * arrival or removal. * Static globals specific to this HUD category. */ static int gdiskstat_count = 0; static struct list_head gdiskstat_list; static mtx_t gdiskstat_mutex = _MTX_INITIALIZER_NP; static struct diskstat_info * find_dsi_by_name(const char *n, int mode) { list_for_each_entry(struct diskstat_info, dsi, &gdiskstat_list, list) { if (dsi->mode != mode) continue; if (strcasecmp(dsi->name, n) == 0) return dsi; } return 0; } static int get_file_values(const char *fn, struct stat_s *s) { int ret = 0; FILE *fh = fopen(fn, "r"); if (!fh) return -1; ret = fscanf(fh, "%" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64 "", &s->r_ios, &s->r_merges, &s->r_sectors, &s->r_ticks, &s->w_ios, &s->w_merges, &s->w_sectors, &s->w_ticks, &s->in_flight, &s->io_ticks, &s->time_in_queue); fclose(fh); return ret; } static void query_dsi_load(struct hud_graph *gr) { /* The framework calls us periodically, compensate for the * calling interval accordingly when reporting per second. */ struct diskstat_info *dsi = gr->query_data; uint64_t now = os_time_get(); if (dsi->last_time) { if (dsi->last_time + gr->pane->period <= now) { struct stat_s stat; if (get_file_values(dsi->sysfs_filename, &stat) < 0) return; float val = 0; switch (dsi->mode) { case DISKSTAT_RD: val = ((stat.r_sectors - dsi->last_stat.r_sectors) * 512) / (((float) gr->pane->period / 1000) / 1000); break; case DISKSTAT_WR: val = ((stat.w_sectors - dsi->last_stat.w_sectors) * 512) / (((float) gr->pane->period / 1000) / 1000); break; } hud_graph_add_value(gr, (uint64_t) val); dsi->last_stat = stat; dsi->last_time = now; } } else { /* initialize */ switch (dsi->mode) { case DISKSTAT_RD: case DISKSTAT_WR: get_file_values(dsi->sysfs_filename, &dsi->last_stat); break; } dsi->last_time = now; } } /** * Create and initialize a new object for a specific block I/O device. * \param pane parent context. * \param dev_name logical block device name, EG. sda5. * \param mode query read or write (DISKSTAT_RD/DISKSTAT_WR) statistics. */ void hud_diskstat_graph_install(struct hud_pane *pane, const char *dev_name, unsigned int mode) { struct hud_graph *gr; struct diskstat_info *dsi; int num_devs = hud_get_num_disks(0); if (num_devs <= 0) return; dsi = find_dsi_by_name(dev_name, mode); if (!dsi) return; gr = CALLOC_STRUCT(hud_graph); if (!gr) return; dsi->mode = mode; if (dsi->mode == DISKSTAT_RD) { snprintf(gr->name, sizeof(gr->name), "%s-Read-MB/s", dsi->name); } else if (dsi->mode == DISKSTAT_WR) { snprintf(gr->name, sizeof(gr->name), "%s-Write-MB/s", dsi->name); } else return; gr->query_data = dsi; gr->query_new_value = query_dsi_load; hud_pane_add_graph(pane, gr); hud_pane_set_max_value(pane, 100); } static void add_object_part(const char *basename, const char *name, int objmode) { struct diskstat_info *dsi = CALLOC_STRUCT(diskstat_info); strcpy(dsi->name, name); snprintf(dsi->sysfs_filename, sizeof(dsi->sysfs_filename), "%s/%s/stat", basename, name); dsi->mode = objmode; list_addtail(&dsi->list, &gdiskstat_list); gdiskstat_count++; } static void add_object(const char *basename, const char *name, int objmode) { struct diskstat_info *dsi = CALLOC_STRUCT(diskstat_info); strcpy(dsi->name, name); snprintf(dsi->sysfs_filename, sizeof(dsi->sysfs_filename), "%s/stat", basename); dsi->mode = objmode; list_addtail(&dsi->list, &gdiskstat_list); gdiskstat_count++; } /** * Initialize internal object arrays and display block I/O HUD help. * \param displayhelp true if the list of detected devices should be displayed on the console. * \return number of detected block I/O devices. */ int hud_get_num_disks(bool displayhelp) { struct dirent *dp; struct stat stat_buf; char name[64]; /* Return the number of block devices and partitions. */ mtx_lock(&gdiskstat_mutex); if (gdiskstat_count) { mtx_unlock(&gdiskstat_mutex); return gdiskstat_count; } /* Scan /sys/block, for every object type we support, create and * persist an object to represent its different statistics. */ list_inithead(&gdiskstat_list); DIR *dir = opendir("/sys/block/"); if (!dir) { mtx_unlock(&gdiskstat_mutex); return 0; } while ((dp = readdir(dir)) != NULL) { /* Avoid 'lo' and '..' and '.' */ if (strlen(dp->d_name) <= 2) continue; char basename[256]; snprintf(basename, sizeof(basename), "/sys/block/%s", dp->d_name); snprintf(name, sizeof(name), "%s/stat", basename); if (stat(name, &stat_buf) < 0) continue; if (!S_ISREG(stat_buf.st_mode)) continue; /* Not a regular file */ /* Add a physical block device with R/W stats */ add_object(basename, dp->d_name, DISKSTAT_RD); add_object(basename, dp->d_name, DISKSTAT_WR); /* Add any partitions */ struct dirent *dpart; DIR *pdir = opendir(basename); if (!pdir) { mtx_unlock(&gdiskstat_mutex); closedir(dir); return 0; } while ((dpart = readdir(pdir)) != NULL) { /* Avoid 'lo' and '..' and '.' */ if (strlen(dpart->d_name) <= 2) continue; char p[64]; snprintf(p, sizeof(p), "%s/%s/stat", basename, dpart->d_name); if (stat(p, &stat_buf) < 0) continue; if (!S_ISREG(stat_buf.st_mode)) continue; /* Not a regular file */ /* Add a partition with R/W stats */ add_object_part(basename, dpart->d_name, DISKSTAT_RD); add_object_part(basename, dpart->d_name, DISKSTAT_WR); } } closedir(dir); if (displayhelp) { list_for_each_entry(struct diskstat_info, dsi, &gdiskstat_list, list) { char line[32]; snprintf(line, sizeof(line), " diskstat-%s-%s", dsi->mode == DISKSTAT_RD ? "rd" : dsi->mode == DISKSTAT_WR ? "wr" : "undefined", dsi->name); puts(line); } } mtx_unlock(&gdiskstat_mutex); return gdiskstat_count; } #endif /* HAVE_GALLIUM_EXTRA_HUD */