交换机堆叠后出现奇怪的网络现象，紧急请各位帮忙解决！！！！！
我用两台Cisco3750G-24Ts交换机堆叠后，产生以下怪现象：
ping 交换机网管地址和用户网关丢包严重，但用户Pc ping 此交换机以外网段的PC不丢包；检查交换机CPU利用率时发现当CPU只要达到30%以上后，Ping网管地址和用户网关就有丢包，且一丢好几个包，并在交换机上不断出现以下信息：
5d21h: %SYS-3-CPUHOG: Task ran for 6203 msec (35/25), process = HL3U bkgrd process, PC = 1DAFE4.
-Traceback= 1DAFE8 6AB70C 69F188 6A0694 1ED39C
5d21h: %SYS-3-CPUHOG: Task ran for 5995 msec (43/29), process = HL3U bkgrd process, PC = 1DAFE4.
-Traceback= 1DAFE8 6AB70C 69F188 6A0694 1ED39C
5d21h: %SYS-3-CPUHOG: Task ran for 5936 msec (35/22), process = HL3U bkgrd process, PC = 1DAFE4.
-Traceback= 1DAFE8 6AB70C 69F188 6A0694 1ED39C
5d21h: %SYS-3-CPUHOG: Task ran for 5652 msec (33/18), process = HL3U bkgrd proce
查Cisco文档又查不到，已有一个星期无法解决，请各位老大们帮帮忙，急阿！
我用的IOS版本为c3750-i5-mz.121-19.EA1d.bin
