samba performance difference between old and the latest ?
Namjae Jeon
namjae.jeon at samsung.com
Fri Sep 6 02:01:51 UTC 2019
Hello,
I found something strange during measuring performance with samba these days.
I checked the performance of samba 4.7.6 and 4.10.6.
There seems to be about 20% performance difference between the two versions.
Test environment
1. use iozone and dd utils
2. share is tmpfs
3. smb client is kernel cifs client
4. oplock disable, oplock = no
4. command : ./iozone -s1g -r4 -e -i 0 -t 1 -b 24m.xls -+u
with samba 4.7.6
Children see throughput for 1 initial writers = 11248.48 kB/sec
Parent sees throughput for 1 initial writers = 11248.28 kB/sec
Min throughput per process = 11248.48 kB/sec
Max throughput per process = 11248.48 kB/sec
Avg throughput per process = 11248.48 kB/sec
Min xfer = 1048576.00 kB
CPU Utilization: Wall time 93.219 CPU time 29.517 CPU
utilization
with samba 4.10.6
Children see throughput for 1 initial writers = 9018.82 kB/sec
Parent sees throughput for 1 initial writers = 9018.70 kB/sec
Min throughput per process = 9018.82 kB/sec
Max throughput per process = 9018.82 kB/sec
Avg throughput per process = 9018.82 kB/sec
Min xfer = 1048576.00 kB
CPU Utilization: Wall time 116.265 CPU time 33.182 CPU
utilization
================================================================================
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dd test result is same with iozone result.
samba 4.7.6 : 11.6MB/s
samba 4.10.6 : 9.5MB/s
with samba 4.7.6 :
root at test1234-Samsung-DeskTop-System:/mnt/read# dd if=/dev/zero of=1.txt bs=4096
count=1024
1024+0 records in
1024+0 records out
4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.360991 s, 11.6 MB/s
with samba 4.10.6 :
root at test1234-Samsung-DeskTop-System:/mnt/read# dd if=/dev/zero of=1.txt bs=4096
count=1024
1024+0 records in
1024+0 records out
4194304 bytes (4.2 MB, 4.0 MiB) copied, 0.442567 s, 9.5 MB/s
Am I missing something? or real issue ?
Thanks!
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