S5500-52C-EI 的 RXT 代表什么进程，为什么这么进程这么高？

  ===============display version===============
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H3C Comware Platform Software
Comware Software, Version 5.20, Release 2202
Copyright (c) 2004-2010 Hangzhou H3C Tech. Co., Ltd. All rights reserved.
H3C S5500-52C-EI uptime is 139 weeks, 2 days, 1 hour, 21 minutes

H3C S5500-52C-EI with 1 Processor
256M    bytes SDRAM
32768K  bytes Flash Memory

Hardware Version is REV.C
CPLD Version is 002
Bootrom Version is 609
[SubSlot 0] 48GE+4SFP Hardware Version is REV.C

<sw1>dis cpu-usage task
===== Current CPU usage info =====
CPU Usage Stat. Cycle: 40 (Second)
CPU Usage            : 81%
CPU Usage Stat. Time : 2002-12-27  13:22:05
CPU Usage Stat. Tick : 0x13c0f1(CPU Tick High) 0x4b38005d(CPU Tick Low)
Actual Stat. Cycle   : 0x0(CPU Tick High) 0xa279caca(CPU Tick Low)

TaskName        CPU        Runtime(CPU Tick High/CPU Tick Low)
VIDL            19%               0/2068f68f
TICK             1%               0/ 1b490ce
STMR             0%               0/  2746f5
SYSM             0%               0/  248c89
PORT             0%               0/   dfa88
L2X0             1%               0/ 27dc6b8
bC.0             0%               0/  366a44
bLK0             0%               0/ 119cdc3
L2X1             0%               0/  fbfa8e
bC.1             0%               0/  34804a
bLK1             0%               0/ 127a9cb
DQFD             0%               0/  17125e
DQIT             0%               0/  867a9d
LPDT             0%               0/    4d63
STAT             0%               0/  5fd682
FMCK             0%               0/  92ad3e
T_VA             0%               0/   1655a
DARP             0%               0/   d2c76
T_DM             0%               0/   c3241
mIPC             0%               0/   b7802
T_ST             0%               0/   adb01
TPBR             0%               0/  16cea6
BGRT             0%               0/  3534ca
SCAR             2%               0/ 35b10f7
bRX1            18%               0/1ede3dc6
bRX2             0%               0/  104947
 RXT            43%               0/46c9b622
ISTK             0%               0/    f263
IPCB             0%               0/  1c6975
RPCQ             0%               0/  db9f21
  VP             0%               0/     fff
DRVR             0%               0/   31c92
IPCM             0%               0/   24ae5
INFO             0%               0/   2675b
INFA             0%               0/    60f1
 DEV             0%               0/  11bf33
STND             0%               0/   70a96
SOCK             0%               0/  3d98f1
SFLW             0%               0/   1c031
 ACL             0%               0/   52451
 mac             0%               0/   175a4
LAGG             0%               0/   1b9c9
MSTP             0%               0/  2e4dd3
GARP             0%               0/  2606e6
CLST             0%               0/   764fd
 NDP             0%               0/   fd633
NTDP             0%               0/   23cc0
HABP             0%               0/   14920
 CFD             0%               0/   70138
RRPP             0%               0/   8b0a3
LLDP             0%               0/  995943
DLDP             0%               0/   8f519
SMLK             0%               0/   36087
PTTP             0%               0/   39a38
PTMT             0%               0/   214c9
 ARP             2%               0/ 37ae512
  IP             0%               0/  9cf735
FSLH             0%               0/   11686
FSLR             0%               0/  1340f8
NTPT             0%               0/  886657
VTYD             0%               0/  1486f9
UDPH             0%               0/   1bc0b
FIB6             0%               0/  135379
  ND             0%               0/  3caaed
AGNT             2%               0/ 4695007
TRAP             0%               0/  1340e7
DT1X             0%               0/   8946c
 ACM             0%               0/  25dfb5
  LS             0%               0/   d626e
RDSO             0%               0/   a33d6
 RDS             0%               0/   9687f
  SC             0%               0/   48fdc
 TAC             0%               0/   e217f
MACA             0%               0/   57e69
 NAT             0%               0/   11d1b
TNLT             0%               0/   2d1ce
IPGD             0%               0/   8b1d6
PSEC             0%               0/   3d0d7
 BFD             0%               0/  1355bb
MFIB             0%               0/  33773c
ROUT             0%               0/  daa952
IFNT             0%               0/   1f971
 au0             0%               0/  fcc3e5