[igt-dev] [PATCH i-g-t] intel-gpu-top: Support for client stats
Tvrtko Ursulin
tvrtko.ursulin at linux.intel.com
Thu Jan 21 18:10:05 UTC 2021
From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Adds support for per-client engine busyness stats i915 exports in sysfs
and produces output like the below:
===============================================================================
intel-gpu-top: Intel Skylake (Gen9) @ /dev/dri/card0 - 951/ 950 MHz;
0% RC6; 14.60/23.62 W; 1482 irqs/s
IMC reads: 1287 MiB/s
IMC writes: 115 MiB/s
ENGINES BUSY MI_SEMA MI_WAIT
Render/3D 95.48% |█████████████████████████████████ | 5% 0%
Blitter 15.98% |█████ | 10% 0%
Video 35.40% |████████████ | 26% 0%
VideoEnhance 0.00% | | 0% 0%
PID NAME Render/3D Blitter Video VideoEnhance
1053 gem_wsim |███ || ||███ || |
1054 gem_wsim |███████ ||█ || || |
===============================================================================
Apart from the existing physical engine utilization it now also shows
utilization per client and per engine class.
v2:
* Version to match removal of global enable_stats toggle.
* Plus various fixes.
v3:
* Support brief backward jumps in client stats.
v4:
* Support device selection.
v5:
* Rebase for class aggregation.
* Optimise sysfs reads a tiny bit by openat(2) and caching client root.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
tools/intel_gpu_top.c | 557 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 545 insertions(+), 12 deletions(-)
diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index 72ad7cbe9a8c..abd7d3cfc8d4 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -1,5 +1,5 @@
/*
- * Copyright © 2007-2019 Intel Corporation
+ * Copyright © 2007-2021 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -625,23 +625,356 @@ static void pmu_sample(struct engines *engines)
}
}
+enum client_status {
+ FREE = 0, /* mbz */
+ ALIVE,
+ PROBE
+};
+
+struct clients;
+
+struct client {
+ struct clients *clients;
+
+ enum client_status status;
+ int sysfs_root;
+ unsigned int id;
+ unsigned int pid;
+ char name[128];
+ unsigned int samples;
+ unsigned long total;
+ struct engines *engines;
+ unsigned long *val;
+ uint64_t *last;
+};
+
+struct clients {
+ unsigned int num_clients;
+
+ unsigned int num_classes;
+ struct engine_class *class;
+
+ char sysfs_root[64];
+
+ struct client *client;
+};
+
+#define for_each_client(clients, c, tmp) \
+ for ((tmp) = (clients)->num_clients, c = (clients)->client; \
+ (tmp > 0); (tmp)--, (c)++)
+
+static struct clients *init_clients(const char *drm_card)
+{
+ struct clients *clients = malloc(sizeof(*clients));
+ const char *slash;
+ ssize_t ret;
+
+ memset(clients, 0, sizeof(*clients));
+
+ if (drm_card) {
+ slash = rindex(drm_card, '/');
+ assert(slash);
+ } else {
+ slash = "card0";
+ }
+
+ ret = snprintf(clients->sysfs_root, sizeof(clients->sysfs_root),
+ "/sys/class/drm/%s/clients/", slash);
+ assert(ret > 0 && ret < sizeof(clients->sysfs_root));
+
+ return clients;
+}
+
+static int __read_to_buf(int fd, char *buf, unsigned int bufsize)
+{
+ ssize_t ret;
+ int err;
+
+ ret = read(fd, buf, bufsize - 1);
+ err = errno;
+ if (ret < 1) {
+ errno = ret < 0 ? err : ENOMSG;
+
+ return -1;
+ }
+
+ if (ret > 1 && buf[ret - 1] == '\n')
+ buf[ret - 1] = '\0';
+ else
+ buf[ret] = '\0';
+
+ return 0;
+}
+
+static int
+__read_client_field(int root, const char *field, char *buf, unsigned int bufsize)
+{
+ int fd, ret;
+
+ fd = openat(root, field, O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ ret = __read_to_buf(fd, buf, bufsize);
+
+ close(fd);
+
+ return ret;
+}
+
+static uint64_t
+read_client_busy(const struct client *client, unsigned int class)
+{
+ char buf[256], *b;
+ int ret;
+
+ assert(client->sysfs_root >= 0);
+ if (client->sysfs_root < 0)
+ return 0;
+
+ ret = snprintf(buf, sizeof(buf), "busy/%u", class);
+ assert(ret > 0 && ret < sizeof(buf));
+ if (ret <= 0 || ret == sizeof(buf))
+ return 0;
+
+ ret = __read_client_field(client->sysfs_root, buf, buf, sizeof(buf));
+ assert(ret == 0);
+ if (ret)
+ return 0;
+
+ /*
+ * Handle both single integer and key=value formats by skipping
+ * leading non-digits.
+ */
+ b = buf;
+ while (*b && !isdigit(*b))
+ b++;
+
+ return strtoull(b, NULL, 10);
+}
+
+static struct client *
+find_client(struct clients *clients, enum client_status status, unsigned int id)
+{
+ struct client *c;
+ int tmp;
+
+ for_each_client(clients, c, tmp) {
+ if ((status == FREE && c->status == FREE) ||
+ (status == c->status && c->id == id))
+ return c;
+ }
+
+ return NULL;
+}
+
+static void update_client(struct client *c, unsigned int pid, char *name)
+{
+ uint64_t val[c->clients->num_classes];
+ unsigned int i;
+
+ if (c->pid != pid)
+ c->pid = pid;
+
+ if (strcmp(c->name, name))
+ strncpy(c->name, name, sizeof(c->name) - 1);
+
+ for (i = 0; i < c->clients->num_classes; i++)
+ val[i] = read_client_busy(c, c->clients->class[i].class);
+
+ c->total = 0;
+
+ for (i = 0; i < c->clients->num_classes; i++) {
+ if (val[i] < c->last[i])
+ continue; /* It will catch up soon. */
+
+ c->val[i] = val[i] - c->last[i];
+ c->total += c->val[i];
+ c->last[i] = val[i];
+ }
+
+ c->samples++;
+ c->status = ALIVE;
+}
+
+static void
+add_client(struct clients *clients, unsigned int id, unsigned int pid,
+ char *name, int sysfs_root)
+{
+ struct client *c;
+
+ if (find_client(clients, ALIVE, id))
+ return;
+
+ c = find_client(clients, FREE, 0);
+ if (!c) {
+ unsigned int idx = clients->num_clients;
+
+ clients->num_clients += (clients->num_clients + 2) / 2;
+ clients->client = realloc(clients->client,
+ clients->num_clients * sizeof(*c));
+ assert(clients->client);
+
+ c = &clients->client[idx];
+ memset(c, 0, (clients->num_clients - idx) * sizeof(*c));
+ }
+
+ c->sysfs_root = sysfs_root;
+ c->id = id;
+ c->clients = clients;
+ c->val = calloc(clients->num_classes, sizeof(c->val));
+ c->last = calloc(clients->num_classes, sizeof(c->last));
+ assert(c->val && c->last);
+
+ update_client(c, pid, name);
+}
+
+static void free_client(struct client *c)
+{
+ if (c->sysfs_root >= 0)
+ close(c->sysfs_root);
+ free(c->val);
+ free(c->last);
+ memset(c, 0, sizeof(*c));
+}
+
+static int
+read_client_sysfs(char *buf, int bufsize, const char *sysfs_root,
+ unsigned int id, const char *field, int *client_root)
+{
+ ssize_t ret;
+
+ if (*client_root < 0) {
+ char namebuf[256];
+
+ ret = snprintf(namebuf, sizeof(namebuf), "%s/%u",
+ sysfs_root, id);
+ assert(ret > 0 && ret < sizeof(namebuf));
+ if (ret <= 0 || ret == sizeof(namebuf))
+ return -1;
+
+ *client_root = open(namebuf, O_RDONLY | O_DIRECTORY);
+ }
+
+ if (*client_root < 0)
+ return -1;
+
+ return __read_client_field(*client_root, field, buf, bufsize);
+}
+
+static void scan_clients(struct clients *clients)
+{
+ struct dirent *dent;
+ struct client *c;
+ unsigned int id;
+ int tmp;
+ DIR *d;
+
+ if (!clients)
+ return;
+
+ for_each_client(clients, c, tmp) {
+ if (c->status == ALIVE)
+ c->status = PROBE;
+ }
+
+ d = opendir(clients->sysfs_root);
+ if (!d)
+ return;
+
+ while ((dent = readdir(d)) != NULL) {
+ char name[256], pid[256];
+ int ret, root = -1, *pr;
+
+ if (dent->d_type != DT_DIR)
+ continue;
+ if (!isdigit(dent->d_name[0]))
+ continue;
+
+ id = atoi(dent->d_name);
+
+ c = find_client(clients, PROBE, id);
+
+ if (c)
+ pr = &c->sysfs_root;
+ else
+ pr = &root;
+
+ ret = read_client_sysfs(name, sizeof(name), clients->sysfs_root,
+ id, "name", pr);
+ ret |= read_client_sysfs(pid, sizeof(pid), clients->sysfs_root,
+ id, "pid", pr);
+ if (!ret) {
+ if (!c)
+ add_client(clients, id, atoi(pid), name, root);
+ else
+ update_client(c, atoi(pid), name);
+ } else if (c) {
+ c->status = PROBE; /* Will be deleted below. */
+ }
+ }
+
+ closedir(d);
+
+ for_each_client(clients, c, tmp) {
+ if (c->status == PROBE)
+ free_client(c);
+ }
+}
+
+static int cmp(const void *_a, const void *_b)
+{
+ const struct client *a = _a;
+ const struct client *b = _b;
+ long tot_a = a->total;
+ long tot_b = b->total;
+
+ tot_a *= a->status == ALIVE && a->samples > 1;
+ tot_b *= b->status == ALIVE && b->samples > 1;
+
+ tot_b -= tot_a;
+
+ if (!tot_b)
+ return (int)b->id - a->id;
+
+ while (tot_b > INT_MAX || tot_b < INT_MIN)
+ tot_b /= 2;
+
+ return tot_b;
+}
+
static const char *bars[] = { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉", "█" };
+static void n_spaces(const unsigned int n)
+{
+ unsigned int i;
+
+ for (i = 0; i < n; i++)
+ putchar(' ');
+}
+
static void
print_percentage_bar(double percent, int max_len)
{
- int bar_len = percent * (8 * (max_len - 2)) / 100.0;
- int i;
+ int bar_len, i, len = max_len - 2;
+ const int w = 8;
+
+ assert(max_len > 0);
+
+ bar_len = percent * len / 100.0;
+ if (bar_len > len)
+ bar_len = len;
+ bar_len *= w;
putchar('|');
- for (i = bar_len; i >= 8; i -= 8)
- printf("%s", bars[8]);
+ for (i = bar_len; i >= w; i -= w)
+ printf("%s", bars[w]);
if (i)
printf("%s", bars[i]);
- for (i = 0; i < (max_len - 2 - (bar_len + 7) / 8); i++)
- putchar(' ');
+ len -= (bar_len + (w - 1)) / w;
+ n_spaces(len);
putchar('|');
}
@@ -744,6 +1077,18 @@ json_close_struct(void)
fflush(stdout);
}
+static void
+__json_add_member(const char *key, const char *val)
+{
+ assert(json_indent_level < ARRAY_SIZE(json_indent));
+
+ fprintf(out, "%s%s\"%s\": \"%s\"",
+ json_struct_members ? ",\n" : "",
+ json_indent[json_indent_level], key, val);
+
+ json_struct_members++;
+}
+
static unsigned int
json_add_member(const struct cnt_group *parent, struct cnt_item *item,
unsigned int headers)
@@ -1046,8 +1391,6 @@ print_header(const struct igt_device_card *card,
memmove(&groups[0], &groups[1],
sizeof(groups) - sizeof(groups[0]));
- pops->open_struct(NULL);
-
*consumed = print_groups(groups);
if (output_mode == INTERACTIVE) {
@@ -1204,7 +1547,7 @@ print_engine(struct engines *engines, unsigned int i, double t,
engine->display_name, engine_items[0].buf);
val = pmu_calc(&engine->busy.val, 1e9, t, 100);
- print_percentage_bar(val, max_w - len);
+ print_percentage_bar(val, max_w > len ? max_w - len : 0);
printf("%s\n", buf);
@@ -1219,7 +1562,6 @@ print_engines_footer(struct engines *engines, double t,
int lines, int con_w, int con_h)
{
pops->close_struct();
- pops->close_struct();
if (output_mode == INTERACTIVE) {
if (lines++ < con_h)
@@ -1243,6 +1585,9 @@ static void init_engine_classes(struct engines *engines)
unsigned int i, num;
int max = -1;
+ if (engines->num_classes)
+ return;
+
for (i = 0; i < engines->num_engines; i++) {
struct engine *engine = engine_ptr(engines, i);
@@ -1404,6 +1749,148 @@ print_engines(struct engines *engines, double t, int lines, int w, int h)
return lines;
}
+static int
+print_clients_header(struct clients *clients, int lines,
+ int con_w, int con_h, int *class_w)
+{
+ if (output_mode == INTERACTIVE) {
+ const char *pidname = " PID NAME ";
+ unsigned int num_active = 0;
+ int len = strlen(pidname);
+
+ if (lines++ >= con_h)
+ return lines;
+
+ printf("\033[7m");
+ printf("%s", pidname);
+
+ if (lines++ >= con_h || len >= con_w)
+ return lines;
+
+ if (clients->num_classes) {
+ unsigned int i;
+ int width;
+
+ for (i = 0; i < clients->num_classes; i++) {
+ if (clients->class[i].num_engines)
+ num_active++;
+ }
+
+ *class_w = width = (con_w - len) / num_active;
+
+ for (i = 0; i < clients->num_classes; i++) {
+ const char *name = clients->class[i].name;
+ int name_len = strlen(name);
+ int pad = (width - name_len) / 2;
+ int spaces = width - pad - name_len;
+
+ if (!clients->class[i].num_engines)
+ continue; /* Assert in the ideal world. */
+
+ if (pad < 0 || spaces < 0)
+ continue;
+
+ n_spaces(pad);
+ printf("%s", name);
+ n_spaces(spaces);
+ len += pad + name_len + spaces;
+ }
+ }
+
+ n_spaces(con_w - len);
+ printf("\033[0m\n");
+ } else {
+ if (clients->num_classes)
+ pops->open_struct("clients");
+ }
+
+ return lines;
+}
+
+static int
+print_client(struct client *c, struct engines *engines, double t, int lines,
+ int con_w, int con_h, unsigned int period_us, int *class_w)
+{
+ struct clients *clients = c->clients;
+ unsigned int i;
+
+ if (output_mode == INTERACTIVE) {
+ printf("%6u %17s ", c->pid, c->name);
+
+ for (i = 0; i < clients->num_classes; i++) {
+ double pct;
+
+ if (!clients->class[i].num_engines)
+ continue; /* Assert in the ideal world. */
+
+ pct = (double)c->val[i] / period_us / 1e3 * 100 /
+ clients->class[i].num_engines;
+
+ /*
+ * Guard against possible time-drift between sampling
+ * client data and time we obtained our time-delta from
+ * PMU.
+ */
+ if (pct > 100.0)
+ pct = 100.0;
+
+ print_percentage_bar(pct, *class_w);
+
+ lines++;
+ }
+
+ putchar('\n');
+ } else if (output_mode == JSON) {
+ char buf[64];
+
+ snprintf(buf, sizeof(buf), "%u", c->id);
+ pops->open_struct(buf);
+
+ __json_add_member("name", c->name);
+
+ snprintf(buf, sizeof(buf), "%u", c->pid);
+ __json_add_member("pid", buf);
+
+ pops->open_struct("engine-classes");
+
+ for (i = 0; i < clients->num_classes; i++) {
+ double pct;
+
+ snprintf(buf, sizeof(buf), "%s",
+ clients->class[i].name);
+ pops->open_struct(buf);
+
+ pct = (double)c->val[i] / period_us / 1e3 * 100;
+ snprintf(buf, sizeof(buf), "%f", pct);
+ __json_add_member("busy", buf);
+
+ __json_add_member("unit", "%");
+
+ pops->close_struct();
+ }
+
+ pops->close_struct();
+ pops->close_struct();
+ }
+
+ return lines;
+}
+
+static int
+print_clients_footer(struct clients *clients, double t,
+ int lines, int con_w, int con_h)
+{
+ if (output_mode == INTERACTIVE) {
+ if (lines++ < con_h)
+ printf("\n");
+ } else {
+ if (clients->num_classes)
+ pops->close_struct();
+ }
+
+ return lines;
+}
+
static bool stop_top;
static void sigint_handler(int sig)
@@ -1492,6 +1979,7 @@ static void process_stdin(unsigned int timeout_us)
int main(int argc, char **argv)
{
unsigned int period_us = DEFAULT_PERIOD_MS * 1000;
+ struct clients *clients = NULL;
int con_w = -1, con_h = -1;
char *output_path = NULL;
struct engines *engines;
@@ -1625,13 +2113,20 @@ int main(int argc, char **argv)
ret = EXIT_SUCCESS;
+ clients = init_clients(card.pci_slot_name[0] ? card.card : NULL);
+ init_engine_classes(engines);
+ clients->num_classes = engines->num_classes;
+ clients->class = engines->class;
+
pmu_sample(engines);
+ scan_clients(clients);
codename = igt_device_get_pretty_name(&card, false);
while (!stop_top) {
bool consumed = false;
- int lines = 0;
+ int j, lines = 0;
struct winsize ws;
+ struct client *c;
double t;
/* Update terminal size. */
@@ -1650,10 +2145,18 @@ int main(int argc, char **argv)
pmu_sample(engines);
t = (double)(engines->ts.cur - engines->ts.prev) / 1e9;
+ scan_clients(clients);
+ if (clients) {
+ qsort(clients->client, clients->num_clients,
+ sizeof(*clients->client), cmp);
+ }
+
if (stop_top)
break;
while (!consumed) {
+ pops->open_struct(NULL);
+
lines = print_header(&card, codename, engines,
t, lines, con_w, con_h,
&consumed);
@@ -1661,6 +2164,36 @@ int main(int argc, char **argv)
lines = print_imc(engines, t, lines, con_w, con_h);
lines = print_engines(engines, t, lines, con_w, con_h);
+
+ if (clients) {
+ int class_w;
+
+ lines = print_clients_header(clients, lines,
+ con_w, con_h,
+ &class_w);
+
+ for_each_client(clients, c, j) {
+ if (lines++ > con_h)
+ break;
+
+ assert(c->status != PROBE);
+ if (c->status != ALIVE)
+ break;
+
+ if (c->samples < 2)
+ continue;
+
+ lines = print_client(c, engines, t,
+ lines, con_w,
+ con_h, period_us,
+ &class_w);
+ }
+
+ lines = print_clients_footer(clients, t, lines,
+ con_w, con_h);
+ }
+
+ pops->close_struct();
}
if (stop_top)
--
2.27.0
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