Ecryptfs WRITE performance issue - decryption happening
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
eCryptfs |
New
|
Undecided
|
Unassigned |
Bug Description
Hi All,
We are struggling to speed up ecryptfs WRITE throughput via robocopy on samba. Our linux kernel running on ARM64 server has PAGE_SIZE of 64K.
Linux kernel version is 4.9.0 Wierd thing that we see lot of decryption happening during WRITES.
What should we tune within ecryptfs or else where - to make decryption go away ?
We expect only encryption to happen (mostly) during WRITE throughput tests.
Are there any ecryptfs patches which we can try out.
perf top
49.50% [kernel] [k] ce_aes_cbc_encrypt
10.37% [kernel] [k] aes_decrypt_block4x
9.74% [kernel] [k] arch_cpu_idle
5.42% [kernel] [k] __pi_memcpy
3.28% [kernel] [k] ce_aes_cbc_decrypt
1.62% [kernel] [k] md5_transform
1.27% [kernel] [k] __arch_
0.69% [kernel] [k] __pi_memset
This is not functional bug. But please help us understand the behavior why decryption is happening.
Regards
Venkat
Hello Experts,
Please provide some opinion this WRITE perf problem with ecryptfs.
Appreciate your valuable suggestions.
Regards
Venkat