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path: root/src/plugins/perfmon/perfmon_periodic.c
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/*
 * mactime_device.h - device table entry
 *
 * Copyright (c) 2018 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef included_mactime_device_h
#define included_mactime_device_h
#include <vppinfra/time_range.h>

#define MACTIME_RANGE_TYPE_DROP 0
#define MACTIME_RANGE_TYPE_ALLOW 1

typedef struct
{
  u8 *device_name;
  u8 mac_address[6];
  u64 data_quota;
  u64 data_used_in_range;
  u32 flags;
  u32 pool_index;
  f64 last_seen;
  clib_timebase_range_t *ranges;
} mactime_device_t;

/** Always drop packets from this device */
#define MACTIME_DEVICE_FLAG_STATIC_DROP		(1<<0)
#define MACTIME_DEVICE_FLAG_STATIC_ALLOW	(1<<1)
#define MACTIME_DEVICE_FLAG_DYNAMIC_DROP	(1<<2)
#define MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW	(1<<3)
#define MACTIME_DEVICE_FLAG_DYNAMIC_ALLOW_QUOTA	(1<<4)
#define MACTIME_DEVICE_FLAG_DROP_UDP_10001      (1<<5)

#endif /* included_mactime_device_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */
='#n448'>448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537
/*
 * perfmon_periodic.c - skeleton plug-in periodic function
 *
 * Copyright (c) <current-year> <your-organization>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vlib/vlib.h>
#include <vppinfra/error.h>
#include <perfmon/perfmon.h>
#include <asm/unistd.h>
#include <sys/ioctl.h>

/* "not in glibc" */
static long
perf_event_open (struct perf_event_attr *hw_event, pid_t pid, int cpu,
		 int group_fd, unsigned long flags)
{
  int ret;

  ret = syscall (__NR_perf_event_open, hw_event, pid, cpu, group_fd, flags);
  return ret;
}

static void
read_current_perf_counters (vlib_main_t * vm, u64 * c0, u64 * c1)
{
  int i;
  u64 *cc;
  perfmon_main_t *pm = &perfmon_main;
  uword my_thread_index = vm->thread_index;

  *c0 = *c1 = 0;

  for (i = 0; i < pm->n_active; i++)
    {
      cc = (i == 0) ? c0 : c1;
      if (pm->rdpmc_indices[i][my_thread_index] != ~0)
	*cc = clib_rdpmc ((int) pm->rdpmc_indices[i][my_thread_index]);
      else
	{
	  u64 sw_value;
	  if (read (pm->pm_fds[i][my_thread_index], &sw_value,
		    sizeof (sw_value)) != sizeof (sw_value))
	    {
	      clib_unix_warning
		("counter read failed, disable collection...");
	      vm->vlib_node_runtime_perf_counter_cb = 0;
	      return;
	    }
	  *cc = sw_value;
	}
    }
}

static void
clear_counters (perfmon_main_t * pm)
{
  int i, j;
  vlib_main_t *vm = pm->vlib_main;
  vlib_main_t *stat_vm;
  vlib_node_main_t *nm;
  vlib_node_t *n;

  vlib_worker_thread_barrier_sync (vm);

  for (j = 0; j < vec_len (vlib_mains); j++)
    {
      stat_vm = vlib_mains[j];
      if (stat_vm == 0)
	continue;

      nm = &stat_vm->node_main;

      /* Clear the node runtime perfmon counters */
      for (i = 0; i < vec_len (nm->nodes); i++)
	{
	  n = nm->nodes[i];
	  vlib_node_sync_stats (stat_vm, n);
	}

      /* And clear the node perfmon counters */
      for (i = 0; i < vec_len (nm->nodes); i++)
	{
	  n = nm->nodes[i];
	  n->stats_total.perf_counter0_ticks = 0;
	  n->stats_total.perf_counter1_ticks = 0;
	  n->stats_total.perf_counter_vectors = 0;
	  n->stats_last_clear.perf_counter0_ticks = 0;
	  n->stats_last_clear.perf_counter1_ticks = 0;
	  n->stats_last_clear.perf_counter_vectors = 0;
	}
    }
  vlib_worker_thread_barrier_release (vm);
}

static void
enable_current_events (perfmon_main_t * pm)
{
  struct perf_event_attr pe;
  int fd;
  struct perf_event_mmap_page *p = 0;
  perfmon_event_config_t *c;
  vlib_main_t *vm = vlib_get_main ();
  u32 my_thread_index = vm->thread_index;
  u32 index;
  int i, limit = 1;
  int cpu;

  if ((pm->current_event + 1) < vec_len (pm->single_events_to_collect))
    limit = 2;

  for (i = 0; i < limit; i++)
    {
      c = vec_elt_at_index (pm->single_events_to_collect,
			    pm->current_event + i);

      memset (&pe, 0, sizeof (struct perf_event_attr));
      pe.type = c->pe_type;
      pe.size = sizeof (struct perf_event_attr);
      pe.config = c->pe_config;
      pe.disabled = 1;
      pe.pinned = 1;
      /*
       * Note: excluding the kernel makes the
       * (software) context-switch counter read 0...
       */
      if (pe.type != PERF_TYPE_SOFTWARE)
	{
	  /* Exclude kernel and hypervisor */
	  pe.exclude_kernel = 1;
	  pe.exclude_hv = 1;
	}

      cpu = vm->cpu_id;

      fd = perf_event_open (&pe, 0, cpu, -1, 0);
      if (fd == -1)
	{
	  clib_unix_warning ("event open: type %d config %d", c->pe_type,
			     c->pe_config);
	  return;
	}

      if (pe.type != PERF_TYPE_SOFTWARE)
	{
	  p = mmap (0, pm->page_size, PROT_READ, MAP_SHARED, fd, 0);
	  if (p == MAP_FAILED)
	    {
	      clib_unix_warning ("mmap");
	      close (fd);
	      return;
	    }
	}
      else
	p = 0;

      if (ioctl (fd, PERF_EVENT_IOC_RESET, 0) < 0)
	clib_unix_warning ("reset ioctl");

      if (ioctl (fd, PERF_EVENT_IOC_ENABLE, 0) < 0)
	clib_unix_warning ("enable ioctl");

      /*
       * Software event counters - and others not capable of being
       * read via the "rdpmc" instruction - will be read
       * by system calls.
       */
      if (pe.type == PERF_TYPE_SOFTWARE || p->cap_user_rdpmc == 0)
	index = ~0;
      else
	index = p->index - 1;

      pm->rdpmc_indices[i][my_thread_index] = index;
      pm->perf_event_pages[i][my_thread_index] = (void *) p;
      pm->pm_fds[i][my_thread_index] = fd;
    }

  pm->n_active = i;
  /* Enable the main loop counter snapshot mechanism */
  vm->vlib_node_runtime_perf_counter_cb = read_current_perf_counters;
}

static void
disable_events (perfmon_main_t * pm)
{
  vlib_main_t *vm = vlib_get_main ();
  u32 my_thread_index = vm->thread_index;
  int i;

  /* Stop main loop collection */
  vm->vlib_node_runtime_perf_counter_cb = 0;

  for (i = 0; i < pm->n_active; i++)
    {
      if (pm->pm_fds[i][my_thread_index] == 0)
	continue;

      if (ioctl (pm->pm_fds[i][my_thread_index], PERF_EVENT_IOC_DISABLE, 0) <
	  0)
	clib_unix_warning ("disable ioctl");

      if (pm->perf_event_pages[i][my_thread_index])
	if (munmap (pm->perf_event_pages[i][my_thread_index],
		    pm->page_size) < 0)
	  clib_unix_warning ("munmap");

      (void) close (pm->pm_fds[i][my_thread_index]);
      pm->pm_fds[i][my_thread_index] = 0;
    }
}

static void
worker_thread_start_event (vlib_main_t * vm)
{
  perfmon_main_t *pm = &perfmon_main;

  enable_current_events (pm);
  vm->worker_thread_main_loop_callback = 0;
}

static void
worker_thread_stop_event (vlib_main_t * vm)
{
  perfmon_main_t *pm = &perfmon_main;
  disable_events (pm);
  vm->worker_thread_main_loop_callback = 0;
}

static void
start_event (perfmon_main_t * pm, f64 now, uword event_data)
{
  int i;
  int last_set;
  int all = 0;
  pm->current_event = 0;

  if (vec_len (pm->single_events_to_collect) == 0)
    {
      pm->state = PERFMON_STATE_OFF;
      return;
    }

  last_set = clib_bitmap_last_set (pm->thread_bitmap);
  all = (last_set == ~0);

  pm->state = PERFMON_STATE_RUNNING;
  clear_counters (pm);

  /* Start collection on thread 0? */
  if (all || clib_bitmap_get (pm->thread_bitmap, 0))
    {
      /* Start collection on this thread */
      enable_current_events (pm);
    }

  /* And also on worker threads */
  for (i = 1; i < vec_len (vlib_mains); i++)
    {
      if (vlib_mains[i] == 0)
	continue;

      if (all || clib_bitmap_get (pm->thread_bitmap, i))
	vlib_mains[i]->worker_thread_main_loop_callback = (void *)
	  worker_thread_start_event;
    }
}

void
scrape_and_clear_counters (perfmon_main_t * pm)
{
  int i, j, k;
  vlib_main_t *vm = pm->vlib_main;
  vlib_main_t *stat_vm;
  vlib_node_main_t *nm;
  vlib_node_t ***node_dups = 0;
  vlib_node_t **nodes;
  vlib_node_t *n;
  perfmon_capture_t *c;
  perfmon_event_config_t *current_event;
  uword *p;
  u8 *counter_name;
  u64 vectors_this_counter;

  /* snapshoot the nodes, including pm counters */
  vlib_worker_thread_barrier_sync (vm);

  for (j = 0; j < vec_len (vlib_mains); j++)
    {
      stat_vm = vlib_mains[j];
      if (stat_vm == 0)
	continue;

      nm = &stat_vm->node_main;

      for (i = 0; i < vec_len (nm->nodes); i++)
	{
	  n = nm->nodes[i];
	  vlib_node_sync_stats (stat_vm, n);
	}

      nodes = 0;
      vec_validate (nodes, vec_len (nm->nodes) - 1);
      vec_add1 (node_dups, nodes);

      /* Snapshoot and clear the per-node perfmon counters */
      for (i = 0; i < vec_len (nm->nodes); i++)
	{
	  n = nm->nodes[i];
	  nodes[i] = clib_mem_alloc (sizeof (*n));
	  clib_memcpy_fast (nodes[i], n, sizeof (*n));
	  n->stats_total.perf_counter0_ticks = 0;
	  n->stats_total.perf_counter1_ticks = 0;
	  n->stats_total.perf_counter_vectors = 0;
	  n->stats_last_clear.perf_counter0_ticks = 0;
	  n->stats_last_clear.perf_counter1_ticks = 0;
	  n->stats_last_clear.perf_counter_vectors = 0;
	}
    }

  vlib_worker_thread_barrier_release (vm);

  for (j = 0; j < vec_len (vlib_mains); j++)
    {
      stat_vm = vlib_mains[j];
      if (stat_vm == 0)
	continue;

      nodes = node_dups[j];

      for (i = 0; i < vec_len (nodes); i++)
	{
	  u8 *capture_name;

	  n = nodes[i];

	  if (n->stats_total.perf_counter0_ticks == 0 &&
	      n->stats_total.perf_counter1_ticks == 0)
	    goto skip_this_node;

	  for (k = 0; k < 2; k++)
	    {
	      u64 counter_value, counter_last_clear;

	      /*
	       * We collect 2 counters at once, except for the
	       * last counter when the user asks for an odd number of
	       * counters
	       */
	      if ((pm->current_event + k)
		  >= vec_len (pm->single_events_to_collect))
		break;

	      if (k == 0)
		{
		  counter_value = n->stats_total.perf_counter0_ticks;
		  counter_last_clear =
		    n->stats_last_clear.perf_counter0_ticks;
		}
	      else
		{
		  counter_value = n->stats_total.perf_counter1_ticks;
		  counter_last_clear =
		    n->stats_last_clear.perf_counter1_ticks;
		}

	      capture_name = format (0, "t%d-%v%c", j, n->name, 0);

	      p = hash_get_mem (pm->capture_by_thread_and_node_name,
				capture_name);

	      if (p == 0)
		{
		  pool_get (pm->capture_pool, c);
		  memset (c, 0, sizeof (*c));
		  c->thread_and_node_name = capture_name;
		  hash_set_mem (pm->capture_by_thread_and_node_name,
				capture_name, c - pm->capture_pool);
		}
	      else
		{
		  c = pool_elt_at_index (pm->capture_pool, p[0]);
		  vec_free (capture_name);
		}

	      /* Snapshoot counters, etc. into the capture */
	      current_event = pm->single_events_to_collect
		+ pm->current_event + k;
	      counter_name = (u8 *) current_event->name;
	      vectors_this_counter = n->stats_total.perf_counter_vectors -
		n->stats_last_clear.perf_counter_vectors;

	      vec_add1 (c->counter_names, counter_name);
	      vec_add1 (c->counter_values,
			counter_value - counter_last_clear);
	      vec_add1 (c->vectors_this_counter, vectors_this_counter);
	    }
	skip_this_node:
	  clib_mem_free (n);
	}
      vec_free (nodes);
    }
  vec_free (node_dups);
}

static void
handle_timeout (vlib_main_t * vm, perfmon_main_t * pm, f64 now)
{
  int i;
  int last_set, all;

  last_set = clib_bitmap_last_set (pm->thread_bitmap);
  all = (last_set == ~0);

  if (all || clib_bitmap_get (pm->thread_bitmap, 0))
    disable_events (pm);

  /* And also on worker threads */
  for (i = 1; i < vec_len (vlib_mains); i++)
    {
      if (vlib_mains[i] == 0)
	continue;
      if (all || clib_bitmap_get (pm->thread_bitmap, i))
	vlib_mains[i]->worker_thread_main_loop_callback = (void *)
	  worker_thread_stop_event;
    }

  /* Make sure workers have stopped collection */
  if (i > 1)
    {
      f64 deadman = vlib_time_now (vm) + 1.0;

      for (i = 1; i < vec_len (vlib_mains); i++)
	{
	  /* Has the worker actually stopped collecting data? */
	  while (vlib_mains[i]->worker_thread_main_loop_callback)
	    {
	      if (vlib_time_now (vm) > deadman)
		{
		  clib_warning ("Thread %d deadman timeout!", i);
		  break;
		}
	      vlib_process_suspend (pm->vlib_main, 1e-3);
	    }
	}
    }
  scrape_and_clear_counters (pm);
  pm->current_event += pm->n_active;
  if (pm->current_event >= vec_len (pm->single_events_to_collect))
    {
      pm->current_event = 0;
      pm->state = PERFMON_STATE_OFF;
      return;
    }

  if (all || clib_bitmap_get (pm->thread_bitmap, 0))
    enable_current_events (pm);

  /* And also on worker threads */
  for (i = 1; i < vec_len (vlib_mains); i++)
    {
      if (vlib_mains[i] == 0)
	continue;
      if (all || clib_bitmap_get (pm->thread_bitmap, i))
	vlib_mains[i]->worker_thread_main_loop_callback = (void *)
	  worker_thread_start_event;
    }
}

static uword
perfmon_periodic_process (vlib_main_t * vm,
			  vlib_node_runtime_t * rt, vlib_frame_t * f)
{
  perfmon_main_t *pm = &perfmon_main;
  f64 now;
  uword *event_data = 0;
  uword event_type;
  int i;

  while (1)
    {
      if (pm->state == PERFMON_STATE_RUNNING)
	vlib_process_wait_for_event_or_clock (vm, pm->timeout_interval);
      else
	vlib_process_wait_for_event (vm);

      now = vlib_time_now (vm);

      event_type = vlib_process_get_events (vm, (uword **) & event_data);

      switch (event_type)
	{
	case PERFMON_START:
	  for (i = 0; i < vec_len (event_data); i++)
	    start_event (pm, now, event_data[i]);
	  break;

	  /* Handle timeout */
	case ~0:
	  handle_timeout (vm, pm, now);
	  break;

	default:
	  clib_warning ("Unexpected event %d", event_type);
	  break;
	}
      vec_reset_length (event_data);
    }
  return 0;			/* or not */
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (perfmon_periodic_node) =
{
  .function = perfmon_periodic_process,
  .type = VLIB_NODE_TYPE_PROCESS,
  .name = "perfmon-periodic-process",
};
/* *INDENT-ON* */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */