[Qemu-block] [PATCH 00/11] qcow2: encryption threads

[Vladimir Sementsov-Ogievskiy]

Hi all!

The series brings threads to qcow2 encryption/decryption path,
like it is already done for compression.

Based-on: Kevin's block-next branch [d3db1496c5]

Performance gain is illustrated by the following test:

]# cat test.sh 
#!/bin/bash

size=1G
src=/ssd/src.raw
dst=/ssd/dst.enc.qcow2

echo create source for tests
./qemu-img create -f raw "$src" $size
./qemu-io -f raw -c "write -P 0xa 0 $size" "$src"

for w in "" "-W"; do
    echo -e "\n\nTest with additional paramter for qemu-img: '$w'\n"

    echo create target...
    ./qemu-img create -f qcow2 --object secret,id=sec0,data=test -o 
encrypt.format=luks,encrypt.key-secret=sec0,encrypt.iter-time=10 "$dst" $size
    echo

    echo test...
    time ./qemu-img convert $w -f raw --object secret,id=sec0,data=test 
--target-image-opts -n "$src" 
"driver=qcow2,file.filename=$dst,encrypt.key-secret=sec0"
done



before patches:

]# ./test.sh 
create source for tests
Formatting '/ssd/src.raw', fmt=raw size=1073741824
wrote 1073741824/1073741824 bytes at offset 0
1 GiB, 1 ops; 0:00:03.02 (338.734 MiB/sec and 0.3308 ops/sec)


Test with additional paramter for qemu-img: ''

create target...
Formatting '/ssd/dst.enc.qcow2', fmt=qcow2 size=1073741824 encrypt.format=luks 
encrypt.key-secret=sec0 encrypt.iter-time=10 cluster_size=65536 
lazy_refcounts=off refcount_bits=16

test...

real    0m12.014s
user    0m11.299s
sys     0m0.928s


Test with additional paramter for qemu-img: '-W'

create target...
Formatting '/ssd/dst.enc.qcow2', fmt=qcow2 size=1073741824 encrypt.format=luks 
encrypt.key-secret=sec0 encrypt.iter-time=10 cluster_size=65536 
lazy_refcounts=off refcount_bits=16

test...

real    0m11.639s
user    0m11.324s
sys     0m1.149s



after patches:

]# ./test.sh 
create source for tests
Formatting '/ssd/src.raw', fmt=raw size=1073741824
wrote 1073741824/1073741824 bytes at offset 0
1 GiB, 1 ops; 0:00:02.63 (388.900 MiB/sec and 0.3798 ops/sec)


Test with additional paramter for qemu-img: ''

create target...
Formatting '/ssd/dst.enc.qcow2', fmt=qcow2 size=1073741824 encrypt.format=luks 
encrypt.key-secret=sec0 encrypt.iter-time=10 cluster_size=65536 
lazy_refcounts=off refcount_bits=16

test...

real    0m12.113s
user    0m11.433s
sys     0m0.878s


Test with additional paramter for qemu-img: '-W'

create target...
Formatting '/ssd/dst.enc.qcow2', fmt=qcow2 size=1073741824 encrypt.format=luks 
encrypt.key-secret=sec0 encrypt.iter-time=10 cluster_size=65536 
lazy_refcounts=off refcount_bits=16

test...

real    0m3.436s
user    0m13.429s
sys     0m1.183s


Vladimir Sementsov-Ogievskiy (11):
  qcow2.h: add missing include
  qcow2: add separate file for threaded data processing functions
  qcow2-threads: use thread_pool_submit_co
  qcow2: split out data processing threads state from BDRVQcow2State
  qcow2-threads: split out generic path
  qcow2-threads: add per-thread data
  qcow2-threads: add encryption
  qcow2: bdrv_co_preadv: improve locking
  qcow2: qcow2_co_preadv: skip using hd_qiov when possible
  qcow2: bdrv_co_pwritev: move encryption code out of the lock
  qcow2: do encryption in threads

 block/qcow2.h         |  34 ++++-
 block/qcow2-threads.c | 281 ++++++++++++++++++++++++++++++++++++
 block/qcow2.c         | 328 +++++++++++++-----------------------------
 block/Makefile.objs   |   2 +-
 4 files changed, 412 insertions(+), 233 deletions(-)
 create mode 100644 block/qcow2-threads.c

-- 
2.18.0