* [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot
@ 2021-04-12 9:23 bugzilla at busybox.net
2021-04-12 20:07 ` [Buildroot] [Bug 13751] " bugzilla at busybox.net
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-04-12 9:23 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
Bug ID: 13751
Summary: libopenssl (static): huge drop in performance in newer
versions of buildroot
Product: buildroot
Version: 2021.02.1
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned at buildroot.uclibc.org
Reporter: maksis33 at gmail.com
CC: buildroot at uclibc.org
Target Milestone: ---
I've done some benchmarking with different TLS 1.3 ciphers with an Intel
Celeron N3150 CPU that has support for the AES-NI instruction set. I used
static builds of AirDC++ Web Client (http://airdcpp-web.github.io) that were
built with different versions of buildroot. Target architecture is x86_64
(nocona). Transfer speeds are limited by the CPU (one core is maxed out).
Encrypted download speeds (Buildroot 2021.02.1):
TLS_AES_128_GCM_SHA256: 27 MB/s
TLS_AES_256_GCM_SHA384: 24 MB/s
TLS_CHACHA20_POLY1305_SHA256: 41 MB/s
Encrypted download speeds (Buildroot 2019.02):
TLS_AES_128_GCM_SHA256: 62 MB/s
TLS_AES_256_GCM_SHA384: 59 MB/s
TLS_CHACHA20_POLY1305_SHA256: 54 MB/s
Note that those are actual network file transfers with additional overhead, so
the plain decrypt speed difference should be much bigger than that ("openssl
speed -evp aes-128-cbc" is about 5x faster than "openssl speed aes-128-cbc" on
the same system).
I'd assume that the issue has something to do with
http://lists.busybox.net/pipermail/buildroot/2019-October/263030.html as the
OpenSSL target arch is "gcc no-asm" in Buildroot 2021.02.1 while 2019.02
targets "linux-x86_64" and also has various *_ASM flags present in the
Makefile. I also confirmed with objdump that the binary built with 2021.02.1 is
missing all references to aesenc/aesdec/other AES-NI instructions while those
instructions are present in the binary built with 2019.02.
I read
https://github.com/openssl/openssl/commit/87bea6550ae0dda7c40937cff2e86cc2b0b09491
and https://github.com/openssl/openssl/issues/9839 but I don't fully understand
why the target architecture was changed. I'd say that ASM support is a must for
applications similar to AirDC++.
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* [Buildroot] [Bug 13751] libopenssl (static): huge drop in performance in newer versions of buildroot
2021-04-12 9:23 [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot bugzilla at busybox.net
@ 2021-04-12 20:07 ` bugzilla at busybox.net
2021-05-04 5:50 ` bugzilla at busybox.net
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-04-12 20:07 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
--- Comment #1 from Arnout Vandecappelle <arnout@mind.be> ---
(In reply to maksis33 from comment #0)
> I'd assume that the issue has something to do with
> http://lists.busybox.net/pipermail/buildroot/2019-October/263030.html
> as the OpenSSL target arch is "gcc no-asm" in Buildroot 2021.02.1 while 2019.02
> targets "linux-x86_64" and also has various *_ASM flags present in the Makefile.
The culprit is actually the following commit:
commit 8c2c959b028d44f5518d4445f864aedae3d90406
Author: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Fri May 31 15:39:28 2019
package/libopenssl: fix static build
no-dso option has been removed with
https://github.com/openssl/openssl/commit/31b6ed76dfd53529b74e79830c81372d0b756929
To fix this error, use "gcc" target in static builds. This target is
very minimalistic, we need to manually pass -lpthread and
-DOPENSSL_THREADS however we can also remove libdl workarounds
Fixes:
-
http://autobuild.buildroot.org/results/96d6b89d20980e8f7fa450b832474a81d492b315
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
The problem is that in a static build, you don't have shared libraries so also
no DSO (the shared library provided by the kernel).
The upstream commit also adds a preprocessor symbol DSO_NONE (which is not set
by anything). So you could try reverting buildroot commit
8c2c959b028d44f5518d4445f864aedae3d90406 and add -DDSO_NONE to
LIBOPENSSL_CFLAGS.
Of course the revert is not entirely trivial, because the code was refactored
and has moved to Config.in...
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* [Buildroot] [Bug 13751] libopenssl (static): huge drop in performance in newer versions of buildroot
2021-04-12 9:23 [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot bugzilla at busybox.net
2021-04-12 20:07 ` [Buildroot] [Bug 13751] " bugzilla at busybox.net
@ 2021-05-04 5:50 ` bugzilla at busybox.net
2021-05-04 8:54 ` bugzilla at busybox.net
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-05-04 5:50 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
--- Comment #2 from Fabrice Fontaine <fontaine.fabrice@gmail.com> ---
Could you try
https://patchwork.ozlabs.org/project/buildroot/patch/20210425133845.2459496-1-fontaine.fabrice at gmail.com/?
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* [Buildroot] [Bug 13751] libopenssl (static): huge drop in performance in newer versions of buildroot
2021-04-12 9:23 [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot bugzilla at busybox.net
2021-04-12 20:07 ` [Buildroot] [Bug 13751] " bugzilla at busybox.net
2021-05-04 5:50 ` bugzilla at busybox.net
@ 2021-05-04 8:54 ` bugzilla at busybox.net
2021-05-04 19:26 ` bugzilla at busybox.net
2021-05-07 8:40 ` bugzilla at busybox.net
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-05-04 8:54 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
--- Comment #3 from maksis33 at gmail.com ---
I tested the patch and it seems to fix the issue. Performance is now similar to
Buildroot 2019.02.
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* [Buildroot] [Bug 13751] libopenssl (static): huge drop in performance in newer versions of buildroot
2021-04-12 9:23 [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot bugzilla at busybox.net
` (2 preceding siblings ...)
2021-05-04 8:54 ` bugzilla at busybox.net
@ 2021-05-04 19:26 ` bugzilla at busybox.net
2021-05-07 8:40 ` bugzilla at busybox.net
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-05-04 19:26 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
Yann E. MORIN <yann.morin.1998@free.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
CC| |yann.morin.1998 at free.fr
Status|NEW |RESOLVED
--- Comment #4 from Yann E. MORIN <yann.morin.1998@free.fr> ---
Hello,
Thanks for your report. We believe this has now been fixed with commit
67d19f6014 (package/libopenssl: fix performance issue in static build)
as provided by Fabrice.
Thanks!
Regards,
Yann E. MORIN.
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* [Buildroot] [Bug 13751] libopenssl (static): huge drop in performance in newer versions of buildroot
2021-04-12 9:23 [Buildroot] [Bug 13751] New: libopenssl (static): huge drop in performance in newer versions of buildroot bugzilla at busybox.net
` (3 preceding siblings ...)
2021-05-04 19:26 ` bugzilla at busybox.net
@ 2021-05-07 8:40 ` bugzilla at busybox.net
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla at busybox.net @ 2021-05-07 8:40 UTC (permalink / raw)
To: buildroot
https://bugs.busybox.net/show_bug.cgi?id=13751
--- Comment #5 from Peter Korsgaard <jacmet@uclibc.org> ---
Also backported to 2021.02.x and will be part of the upcoming 2021.02.2 release
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