test

for test

Transcript

1. File read PHSIM
2. Case •12KB file •Read 2K ~ 10K file data to a 8K user buf Virt user buffer physical user buffer Virt data block physical user buffer Page table Share buffer dpu cpu 共享
3. Virt_buf Virt_data_block Virt_buf 為傳入的參數， 在此read operation中user buffer 的目的地vaddr Virt_data_block 為要讀data的起始virt addr Filesystem (CPU)
4. Virt_buf Virt_data_block 使用get user page觸發page fault，使virt user buffer產生對應的physical user buffer page Filesystem (CPU)
5. Virt_buf Virt_data_block Pim driver(CPU) Virt_bufxxx Pgd 取得包含virt_buf的pgd指針位置(取得最上層的表的位置) pgd，並填入shared buf
6. Virt_buf Virt_data_block Pim driver(CPU) Virt_bufxxx Pgd 取得包含virt_buf的pgd指針位置(取得最上層的表的位置) pgd，並填入shared buf pgd
7. Virt_buf Virt_data_block Pim driver(CPU) 通過計算取得phys_data_block，並填入shared buffer pgd phys_data_block=Virt_data_block- offset
8. Virt_buf Virt_data_block Pim driver(CPU) 通過計算取得phys_data_block，並填入shared buffer pgd (src)phys_data_block phys_data_block phys_data_block=Virt_data_block- offset
9. Virt_buf Virt_data_block Pim driver(CPU) 填入dst (virt_buf)和size和command type pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block
10. Virt_buf Virt_data_block Pim kernel(DPU) 通過pgd和virt_buf找到對應的phys_buf pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block Virt_buf phys_buf Pgd
11. Virt_buf Virt_data_block Pim kernel(DPU) DPU通過pgd和virt_buf找到對應的phys_buf pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block Virt_buf phys_buf Pgd phys_buf
12. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_buf, 2K); memcpy_v(phys_buf, phys_data_block, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU
13. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_buf, 2K); memcpy_v(phys_buf, phys_data_block, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU
14. Virt_buf Virt_data_block Pim kernel(DPU) pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf Virt_buf+2K phys_buf+2K Pgd 通過pgd和(virt_buf+2K)查表找到對應的phys_buf+2K(此處似乎不必要) phys_buf+2K Virt_buf+2K
15. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_buf+2K, 2K); memcpy_v(phys_buf+2K, phys_data_block+2K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU phys_buf+2K Virt_buf+2K
16. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_buf+2K, 2K); memcpy_v(phys_buf+2K, phys_data_block+2K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU phys_buf+2K Virt_buf+2K
17. Virt_buf Virt_data_block Pim kernel(DPU) pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf Virt_buf+4K phys_bufA Pgd 通過pgd和(virt_buf+4K)查表找到對應的值phys_bufA Virt_buf+4K
18. Virt_buf Virt_data_block Pim kernel(DPU) pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf Virt_buf+4K phys_bufA Pgd 通過pgd和(virt_buf+4K)查表找到對應的值phys_bufA Virt_buf+4K phys_bufA
19. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_bufA, 2K); memcpy_v(phys_bufA, phys_data_block+4K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU Virt_buf+4K phys_bufA
20. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_bufA, 2K); memcpy_v(phys_bufA, phys_data_block+4K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU Virt_buf+4K phys_bufA
21. Virt_buf Virt_data_block Pim kernel(DPU) pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf Virt_buf+4K phys_bufA Virt_buf+6K phys_bufA+2K Pgd 通過pgd和(virt_buf+6K)查表找到對應的phys_bufA+2K(此處似乎不必要)
22. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_bufA+2K, 2K); memcpy_v(phys_bufA, phys_data_block+6K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU Virt_buf+4K phys_bufA
23. Virt_buf Virt_data_block Pim kernel(DPU) Copy data (到page boundary ) clflush(phys_bufA+2K, 2K); memcpy_v(phys_bufA, phys_data_block+6K, 2K); pgd (src)phys_data_block Size(8K) (dst) virt_buf read phys_data_block phys_buf DPU Virt_buf+4K phys_bufA