table 508 - notice details:
  slid             16
  method            8
  reserved          8
  attr_id          16
  reserved         16
  attr_mod         32
  reserved          8
  qp               24
  cc_key           64
  sgid            128
  padding         112

table 509 - congestion info:
  support_credit_starvation            1 //switch only
  support_per_port_threshold           1 //switch only
  support_per_port_pkt_size            1 //switch only
  support_per_port_mark_rate           1 //switch only
  support_per_port_cs_threshold        1 //switch only
  support_per_port_cs_return_delay     1 //switch only
  support_qp_based_congestion_control  1 //ca only
  support_sl_based_congestion_control  1 //ca only
  reserved                             8
  control_table_cap                    8

table 511 - congestion log (switch):
  log_type          8
  flags             8
  event_ctr        16
  timestamp        32
  port_map         256
  entry_list      1440 // array of 15 most recent events (instead of 20)

table 512 - congestion log event (switch):
  slid             16
  dlid             16
  sl                4
  reserved         28
  timestamp        32

table 513 - congestion log (ca):
  log_type          8
  flags             8
  event_ctr        16
  event_map        16
  reserved         16
  timestamp        32
  event_log      1664 // array of 13 most recent events (instead of 16)

table 514 - congestion log event (ca):
  local_qpn        24
  reserved          8
  remote_qpn       24
  sl                4
  service_type      4
  rlid             16
  reserved         16
  timestamp        32

table 515 - switch congestion setting:
  control_map      32
  victim_mask     256
  credit_mask     256
  threshold         4
  reserved          4
  packet_size       8
  cs_threshold      4
  reserved         12
  cs_return_delay  16
  marking_rate     16

table 516 - switch port congestion setting attribute:
  cong_setting_block   1024  // contains an array of 32 switch_port_congestion_setting_elements

table 517 - switch port congestion setting element:
  valid             1
  control_type      1
  reserved          2
  threshold         4
  packet_size       8 // when control_type=1 this field is reserved
  cong_parm        16 // when control_type=0 this field contains the port marking_rate
                      // attribute_modifier is a pointer to a block of 32 congestion controls

table 519 - ca congestion entry:
  ccti_timer       16
  ccti_increase     8
  trigger_thresh    8
  ccti_min          8
  reserved         24

table 520 - congestion control table:
  ccti_limit       16
  reserved         16
  ccti_entries   1024 // origin of the ccti_entry_list is attribute_modifer*64 (instead of attribute_modifier*64+1)