运行环境:Linux
现象:
1. 只跑一个cpu时, 运行多个进程没有问题。
2.开启SMP后, 四个CPU能正常启动,但是一旦跑多任务(后台多起几个程序),就会百分之百卡死,不进异常。
3.开启SMP后,关闭L1/L2 Dcache后,按照同样方法跑多任务,就不会卡死。
看起开好像是cache一致性问题,请教大家有没有什么好的想法和debug手段?
Hi,
I am looking at Cortex-A7 TRM, In "Direct Access to Internal Memory"
we can see several information regarding a cache line. Those are:
1. Current data in cache
2. its 4-bit MOESI state,
3. Outer Memory Attribute
4. its tag
5. NS State.
However…