Embed Size (px)
Citation preview
2Computer Systems and Platforms Lab
Reference code
Based on Version_MPB/Ver1 j-halt.S driver/net/rckmb.c prepMig.c writeIRQ.c halt.c swapLUT.c / swapMGB.c resumefromHalt.c
3Computer Systems and Platforms Lab
Process
1-1. prepare to set Migration Flag (prepMig.c)
set src & dst pid
Create PrivMGB & InfoMGB
4Computer Systems and Platforms Lab
Process
1-2. write pid into InfoMGB (prepMig.c)
Mapping Memory Address & Write processor id in info_buf
5Computer Systems and Platforms Lab
Process
1-3. Set Flag
Mapping Memory Address & Write Migration Flag in priv_buf
6Computer Systems and Platforms Lab
Process
2-1. Send Interrupt Request (writeIRQ.c)
Define Config Register
9Computer Systems and Platforms Lab
Process
2-3. Set Interrupt Flag on Mapped Address
10Computer Systems and Platforms Lab
Process
3-1. Interrupt Handler operates in the driver(rckmb.c) Read migration Flag
11Computer Systems and Platforms Lab
Process
3-1. Interrupt Handler operates in the driver Check the flag
If flag sets PAUSE or RESUME, return 1else return 0
12Computer Systems and Platforms Lab
Process
3-2. Migration Process does not happened
13Computer Systems and Platforms Lab
Process
4-1. Halt operation (halt.c) Define the configure register address
14Computer Systems and Platforms Lab
Process
How to calculate the Config Register Address. BASE_ADDR = 0xE0000000
Reference for Config Register
15Computer Systems and Platforms Lab
Process
How to Calculate the Config Register Address SubAddress of Core configuration register
So we can get address from core number!
16Computer Systems and Platforms Lab
Process
4-2. Halt Operation Set the Clock Mask (~0x40)
Map Memory Address
Set the clock mask to stop
17Computer Systems and Platforms Lab
Process
5-1. In network driver(rckmb.c) Read migration Flag
18Computer Systems and Platforms Lab
Process
5-2. In network driver Check the flag
Return 1 ( set the halt flag)∵
20Computer Systems and Platforms Lab
Process
5-4. Map the memory address
Status : halt
Status : resume
21Computer Systems and Platforms Lab
Process
5-5. Write Halt signal in the memory
Write Signal
Save esp
Flush L1 & L2 Cache
Save the register (external)
22Computer Systems and Platforms Lab
Process
6-1. Register Saving Process ( j-halt.S) Save the register into the argument address
Start this point
Save the register (external)
24Computer Systems and Platforms Lab
Process
6-2. Check the condition If flag == RUN, pass this process else check again.
So SRC / DST core halts during this session
26Computer Systems and Platforms Lab
Process
7-1. Swap LookupTable (SwapLUT.c)
Almost same process to gather config register addr Except for RCK_LUT
27Computer Systems and Platforms Lab
Process
How to get LUT register address BASE_ADDR = 0xE0000000
So we can get address from core number!
28Computer Systems and Platforms Lab
Process
7-1. Swap LookupTable (SwapLUT.c) Get SRC/DST aligned address
29Computer Systems and Platforms Lab
Process
7-1. Swap LookupTable (SwapLUT.c)
30Computer Systems and Platforms Lab
Process
Private LUT Entries of System Memory
31Computer Systems and Platforms Lab
Process
7-2. Swap Migration Buffer (swapMGB.c)
32Computer Systems and Platforms Lab
Process
7-2. Swap Migration Buffer (swapMGB.c) Idea : Utilize the unused shared Memory
33Computer Systems and Platforms Lab
Process
7-2. Swap Migration Buffer (swapMGB.c)
34Computer Systems and Platforms Lab
Process
8-1. Resume Process (resumeFromHalt.c)
38Computer Systems and Platforms Lab
Process
9. Pass through the halt process
39Computer Systems and Platforms Lab
Process
10. and also pass through the migration process in network driver.
40Computer Systems and Platforms Lab
Process
10. and also pass through the migration process in network driver.
41Computer Systems and Platforms Lab
Process
10. and also pass through the migration process in network driver.
42Computer Systems and Platforms Lab
Process
10. and also pass through the migration process in network driver.
43Computer Systems and Platforms Lab
Process
10. and also pass through the migration process in network driver.
44Computer Systems and Platforms Lab
Interest thing.
Difference Between Direct write in memory and us-ing systemcall(writel()) Writel() -> asm instruction (“movnti”) movnti instruction minimize the impact of processor`s data
cache(cache pollution) Direct write ex) **address = result
Just write the data whichever mov instruction like(just move)
