Re: [Intel-gfx] [PATCH i-g-t 8/8] gputop: Basic vendor agnostic GPU top tool

Rob Clark
2023-04-05T17:57:39Z

On Tue, Jan 31, 2023 at 3:33 AM Tvrtko Ursulin
<tvrtko.ursulin@linux.intel.com> wrote:
>
> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>
> Rudimentary vendor agnostic example of how lib_igt_drm_clients can be used
> to display a sorted by card and usage list of processes using GPUs.
>
> Borrows a bit of code from intel_gpu_top but for now omits the fancy
> features like interactive functionality, card selection, client
> aggregation, sort modes, JSON output and pretty engine names. Also no
> support for global GPU or system metrics.
>
> On the other hand it shows clients from all DRM cards which
> intel_gpu_top does not do.
>
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
> Cc: Rob Clark <robdclark@chromium.org>
> Cc: Christian König <ckoenig.leichtzumerken@gmail.com>
> Acked-by: Christian König <christian.koenig@amd.com>

Reviewed-by: Rob Clark <robdclark@chromium.org>

> ---
> tools/gputop.c | 260 ++++++++++++++++++++++++++++++++++++++++++++++
> tools/meson.build | 5 +
> 2 files changed, 265 insertions(+)
> create mode 100644 tools/gputop.c
>
> diff --git a/tools/gputop.c b/tools/gputop.c
> new file mode 100644
> index 000000000000..d259cac1ab17
> --- /dev/null
> +++ b/tools/gputop.c
> @@ -0,0 +1,260 @@
> +// SPDX-License-Identifier: MIT
> +/*
> + * Copyright © 2022 Intel Corporation
> + */
> +
> +#include <assert.h>
> +#include <ctype.h>
> +#include <dirent.h>
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <inttypes.h>
> +#include <limits.h>
> +#include <locale.h>
> +#include <math.h>
> +#include <poll.h>
> +#include <signal.h>
> +#include <stdint.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <sys/ioctl.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +#include <unistd.h>
> +#include <termios.h>
> +#include <sys/sysmacros.h>
> +#include <stdbool.h>
> +
> +#include "igt_drm_clients.h"
> +#include "igt_drm_fdinfo.h"
> +
> +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, i, len = max_len - 2;
> + const int w = 8;
> +
> + assert(max_len > 0);
> +
> + bar_len = ceil(w * percent * len / 100.0);
> + if (bar_len > w * len)
> + bar_len = w * len;
> +
> + putchar('|');
> +
> + for (i = bar_len; i >= w; i -= w)
> + printf("%s", bars[w]);
> + if (i)
> + printf("%s", bars[i]);
> +
> + len -= (bar_len + (w - 1)) / w;
> + n_spaces(len);
> +
> + putchar('|');
> +}
> +
> +static int
> +print_client_header(struct igt_drm_client *c, int lines, int con_w, int con_h,
> + int *engine_w)
> +{
> + const char *pidname = " PID NAME ";
> + int ret, len = strlen(pidname);
> +
> + if (lines++ >= con_h || len >= con_w)
> + return lines;
> + printf("\033[7m");
> + ret = printf("DRM minor %u", c->drm_minor);
> + n_spaces(con_w - ret);
> +
> + if (lines++ >= con_h)
> + return lines;
> + printf("\n%s", pidname);
> +
> + if (c->engines->num_engines) {
> + unsigned int i;
> + int width;
> +
> + *engine_w = width = (con_w - len) / c->engines->num_engines;
> +
> + for (i = 0; i <= c->engines->max_engine_id; i++) {
> + const char *name = c->engines->names[i];
> + int name_len = strlen(name);
> + int pad = (width - name_len) / 2;
> + int spaces = width - pad - name_len;
> +
> + if (!name)
> + continue;
> +
> + 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");
> +
> + return lines;
> +}
> +
> +
> +static bool
> +newheader(const struct igt_drm_client *c, const struct igt_drm_client *pc)
> +{
> + return !pc || c->drm_minor != pc->drm_minor;
> +}
> +
> +static int
> +print_client(struct igt_drm_client *c, struct igt_drm_client **prevc,
> + double t, int lines, int con_w, int con_h,
> + unsigned int period_us, int *engine_w)
> +{
> + unsigned int i;
> +
> + /* Filter out idle clients. */
> + if (!c->total_runtime || c->samples < 2)
> + return lines;
> +
> + /* Print header when moving to a different DRM card. */
> + if (newheader(c, *prevc)) {
> + lines = print_client_header(c, lines, con_w, con_h, engine_w);
> + if (lines >= con_h)
> + return lines;
> + }
> +
> + *prevc = c;
> +
> + printf("%8u %17s ", c->pid, c->print_name);
> + lines++;
> +
> + for (i = 0; c->samples > 1 && i <= c->engines->max_engine_id; i++) {
> + double pct;
> +
> + if (!c->engines->capacity[i])
> + continue;
> +
> + pct = (double)c->val[i] / period_us / 1e3 * 100 /
> + c->engines->capacity[i];
> +
> + /*
> + * Guard against fluctuations between our scanning period and
> + * GPU times as exported by the kernel in fdinfo.
> + */
> + if (pct > 100.0)
> + pct = 100.0;
> +
> + print_percentage_bar(pct, *engine_w);
> + }
> +
> + putchar('\n');
> +
> + return lines;
> +}
> +
> +static int
> +__client_id_cmp(const struct igt_drm_client *a,
> + const struct igt_drm_client *b)
> +{
> + if (a->id > b->id)
> + return 1;
> + else if (a->id < b->id)
> + return -1;
> + else
> + return 0;
> +}
> +
> +static int client_cmp(const void *_a, const void *_b, void *unused)
> +{
> + const struct igt_drm_client *a = _a;
> + const struct igt_drm_client *b = _b;
> + long val_a, val_b;
> +
> + /* DRM cards into consecutive buckets first. */
> + val_a = a->drm_minor;
> + val_b = b->drm_minor;
> + if (val_a > val_b)
> + return 1;
> + else if (val_b > val_a)
> + return -1;
> +
> + /*
> + * Within buckets sort by last sampling period aggregated runtime, with
> + * client id as a tie-breaker.
> + */
> + val_a = a->last_runtime;
> + val_b = b->last_runtime;
> + if (val_a == val_b)
> + return __client_id_cmp(a, b);
> + else if (val_b > val_a)
> + return 1;
> + else
> + return -1;
> +
> +}
> +
> +int main(int argc, char **argv)
> +{
> + unsigned int period_us = 2e6;
> + struct igt_drm_clients *clients = NULL;
> + int con_w = -1, con_h = -1;
> +
> + clients = igt_drm_clients_init(NULL);
> + if (!clients)
> + exit(1);
> +
> + igt_drm_clients_scan(clients, NULL, NULL, 0);
> +
> + for (;;) {
> + struct igt_drm_client *c, *prevc = NULL;
> + int i, engine_w = 0, lines = 0;
> + struct winsize ws;
> +
> + if (ioctl(0, TIOCGWINSZ, &ws) != -1) {
> + con_w = ws.ws_col;
> + con_h = ws.ws_row;
> + if (con_w == 0 && con_h == 0) {
> + /* Serial console. */
> + con_w = 80;
> + con_h = 24;
> + }
> + }
> +
> + igt_drm_clients_scan(clients, NULL, NULL, 0);
> + igt_drm_clients_sort(clients, client_cmp);
> +
> + printf("\033[H\033[J");
> +
> + igt_for_each_drm_client(clients, c, i) {
> + assert(c->status != IGT_DRM_CLIENT_PROBE);
> + if (c->status != IGT_DRM_CLIENT_ALIVE)
> + break; /* Active clients are first in the array. */
> +
> + lines = print_client(c, &prevc, (double)period_us / 1e6,
> + lines, con_w, con_h, period_us,
> + &engine_w);
> + if (lines >= con_h)
> + break;
> + }
> +
> + if (lines++ < con_h)
> + printf("\n");
> +
> + usleep(period_us);
> + }
> +
> + return 0;
> +}
> diff --git a/tools/meson.build b/tools/meson.build
> index c6194fd15daa..0a3973dee90d 100644
> --- a/tools/meson.build
> +++ b/tools/meson.build
> @@ -65,6 +65,11 @@ if libudev.found()
> install : true)
> endif
>
> +executable('gputop', 'gputop.c',
> + install : true,
> + install_rpath : bindir_rpathdir,
> + dependencies : [lib_igt_drm_clients,lib_igt_drm_fdinfo,math])
> +
> intel_l3_parity_src = [ 'intel_l3_parity.c', 'intel_l3_udev_listener.c' ]
> executable('intel_l3_parity', sources : intel_l3_parity_src,
> dependencies : tool_deps,
> --
> 2.34.1
>