Hi Tony,
On 02/12/20 15:22, Tony He wrote:
Hi Jan,
Welcome to join the discussion.
>the second set of numbers doesn't make sense, and a much better test
is to do an actual encryption test
I don't compile cryptodev kernel module for my PC and can not
reproduce this issue for now. You don't understand the reason why
the performance is much worse with cryptodev module for *big* blocks,
right?
If yes, I guess the reason maybe kernel assign the work to multi cores
while OpenSSL uses one core. Would you share the output of command
"mpstat -P ALL 2"?
sure, while using the cryptodev I see this:
15:28:36 CPU %usr %nice %sys %iowait %irq %soft %steal
%guest %gnice %idle
15:28:38 all 1.87 0.00 23.19 0.12 0.00 0.00 0.00
0.00 0.00 74.81
15:28:38 0 0.00 0.00 0.00 0.50 0.00 0.00 0.00
0.00 0.00 99.50
15:28:38 1 7.00 0.00 93.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00
15:28:38 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 100.00
15:28:38 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 100.00
15:28:38 CPU %usr %nice %sys %iowait %irq %soft %steal
%guest %gnice %idle
15:28:40 all 0.75 0.00 24.19 0.00 0.00 0.00 0.00
0.00 0.00 75.06
15:28:40 0 0.00 0.00 0.00 0.50 0.00 0.00 0.00
0.00 0.00 99.50
15:28:40 1 3.50 0.00 96.50 0.00 0.00 0.00 0.00
0.00 0.00 0.00
15:28:40 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 100.00
15:28:40 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 100.00
on a 4 core box; this means that 1 core is used 100% (which is what I
expected).
I suspect the main reason the cryptodev results on my i5-6800 go off the
rails is due to this:
(look at the "Doing aes-128-cbc lines")
$ ./openssl speed -evp aes-128-cbc
Doing aes-128-cbc for 3s on 16 size blocks: 2835368 aes-128-cbc's in 1.14s
Doing aes-128-cbc for 3s on 64 size blocks: 2720745 aes-128-cbc's in 1.01s
Doing aes-128-cbc for 3s on 256 size blocks: 2377830 aes-128-cbc's in
*0.74s*
Doing aes-128-cbc for 3s on 1024 size blocks: 1538693 aes-128-cbc's in
*0.40s*
Doing aes-128-cbc for 3s on 8192 size blocks: 370202 aes-128-cbc's in
*0.11s*
OpenSSL 1.0.2m 2 Nov 2017
built on: reproducible build, date unspecified
options:bn(64,64) rc4(16x,int) des(idx,cisc,16,int) aes(partial)
idea(int) blowfish(idx)
compiler: gcc -I. -I.. -I../include -DOPENSSL_THREADS -D_REENTRANT
-DDSO_DLFCN -DHAVE_DLFCN_H -DHAVE_CRYPTODEV -DUSE_CRYPTODEV_DIGESTS
-Wa,--noexecstack -m64 -DL_ENDIAN -O3 -Wall -DOPENSSL_IA32_SSE2
-DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m
-DRC4_ASM -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM
-DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM -DECP_NISTZ256_ASM
The 'numbers' are in 1000s of bytes per second processed.
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-cbc 39794.64k 172403.64k 822600.65k 3939054.08k
27569952.58k
The timing for how quickly the results are returned are way off and
probably just wrong. The Openssl speed test is supposed to run for 3
seconds. The actual results returned for 8192 byte blocks is
Doing aes-128-cbc for 3s on 8192 size blocks: 370202 aes-128-cbc's in
*0.11s*
whereas without cryptodev I see
Doing aes-128-cbc for 3s on 8192 size blocks: 457255 aes-128-cbc's in
*3.00s*
So you can see that without cryptodev the i5-6800 actually says it's
doing more blocks (457,255 vs 370,202) but with cryptodev it is doing it
in WAY less time. This leads me to believe the openssl speed code when
using cryptodev just "goes wrong".
It will be very interesting to see what the encryption test will bring -
that is a much better real-life-like example than a simple speed test.
HTH,
JJK
>My advice is to rerun your tests *without* the cryptodev module and
then decide wheter you really need CBC+CCM hmacs.
Yes, I confirm that without the cryptodev the performance is very bad
for my device. I don't have that device in my hand right now. But I
saved one aes-256-cbc result in my web notebook as below:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-256-cbc 19626.95k 24289.71k 25054.46k 25347.75k 25337.86k
Please note, there are two modes to accelerate encryption/decryption.
1. HW instructions like intel x86 CPU.
2. Using a crypto engine.
When your device is 2 and its CPU is not powerful, normally with
cryptodev speed is much faster at least for big blocks. Maybe for
small blocks it's slower because
it needs the time to push the work to kernel and then HW engine and
the time spent is may longer than the time costed by OpenSSL directly
does the encryption/decryption.
Tony
Jan Just Keijser <janj...@nikhef.nl <mailto:janj...@nikhef.nl>>
于2020年12月2日周三 下午7:24写道：
hi Tony,
On 01/12/20 02:50, Tony He wrote:
Hi Arne,
openssl speed -evp aes-128-cbc
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-cbc 20035.60k 123261.54k 267081.60k 1094764.09k 9181370.18k
openssl speed -evp aes-128-gcm
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-gcm 18738.76k 19284.91k 19524.44k 19606.87k 19685.46k
openssl speed -evp aes-128-ccm
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-ccm 53859.07k 215581.12k 862070.02k 3460786.43k 27566347.61k
openssl speed -evp sha1
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes sha1
3108.57k 12177.79k 57325.18k 181610.34k 1207364.27k
openssl speed -evp chacha20-poly1305
chacha20-poly1305 is an unknown cipher or digest
Using old openssl, so chacha20-poly1305 is not supported.
these numbers look suspiciously like you're using the linux
cryptodev module. Openssl speed results for the linux cryptodev
module are totally unreliable and I'd even go so far as to say
that the *only* numbers I trust in the output above are for
aes-128-gcm
For example, if I do the same on an i5-6800 I get *without* the
cryptodev module:
$ openssl speed -evp aes-128-cbc
aes-128-cbc 1,104,599.38k 1,208,651.07k 1,231,766.70k
1,237,545.64k 1,248,793.94k
and with the module I get
aes-128-cbc 45,087.41k 127,822.72k 581,517.17k
2,256,593.19k 27,583,804.51k
the second set of numbers doesn't make sense, and a much better
test is to do an actual encryption test, e.g.
*without* the module
cat BIGFILE | openssl aes-256-cbc -e -pass pass:thisisabadpassword
| pv > /dev/null
2.93GB 0:00:05 [ 549MB/s] [ <=> ]
('pv' aka 'pipeview' is a handy tool to measure the throughput of
a UNIX pipe)
and with the module:
cat BIGFILE | ./openssl aes-256-cbc -e -pass
pass:thisisabadpassword -engine cryptodev| pv > /dev/null
engine "cryptodev" set.
2.93GB 0:00:07 [ 426MB/s] [ <=>
so you see that using the cryptodev module actually slows things
down - which is to be expected, as the application needs to do
more work using the cryptodev module.
My advice is to rerun your tests *without* the cryptodev module
and then decide wheter you really need CBC+CCM hmacs.
HTH,
JJK
Arne Schwabe <a...@rfc2549.org <mailto:a...@rfc2549.org>>
于2020年11月26日周四 下午6:40写道：
Am 26.11.20 um 10:41 schrieb Tony He:
> Hi Arne,
>
>>Since the original thread was not on the mailing list I am
missing your
>>goal but if your crypto acelator already works with
OpenSSL, then it
>>will also work with the "normal" OpenVPN
>
> Yes, it wokrs with "normal" OpenVPN(OpenVPN2), but
according to the test
> result, it's still not fast(about 60Mbps).
> The bottleneck is not encryption operation any more. It
comes from the
> switch of user space and kernel space in the OpenVPN2,
> which makes the poor CPU of embedded device very
busy. That's why we
> need OpenVPN3 running in the kernel space.
What numbers are we are talking in crypto speed? Could you
provide from
your "poor" device:
openssl speed -evp aes-128-cbc
openssl speed -evp aes-128-gcm
openssl speed -evp aes-128-ccm
openssl speed -evp sha1
openssl speed -evp chacha20-poly1305
I want to what difference/gain in terms of raw crypto speed
we are
talking here.
Arne
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