linux-kernel - Re: [v2 PATCH] crypto: powerpc/poly1305

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250510060219.GC505731@sol>
Date: Fri, 9 May 2025 23:02:19 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: Herbert Xu <herbert@...dor.apana.org.au>
Cc: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>,
	Thorsten Leemhuis <linux@...mhuis.info>,
	Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Next Mailing List <linux-next@...r.kernel.org>,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Danny Tsen <dtsen@...ux.ibm.com>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [v2 PATCH] crypto: powerpc/poly1305 - Add poly1305_emit_arch
 wrapper

On Sat, May 10, 2025 at 01:50:02PM +0800, Herbert Xu wrote:
> On Sat, May 10, 2025 at 01:49:13PM +0800, Herbert Xu wrote:
> >
> > Did I do something wrong?
> 
> OK perhaps it's just that the qemu emulation being slow.

Yes, non-native QEMU usually isn't any good for benchmarking the
architecture-optimized code, due to the instructions it uses having to be
emulated.  Just to give another random example, in (non-native) QEMU the RISC-V
CRC code is much slower than the generic CRC code.  But when run on an actual
RISC-V processor it's much faster.

- Eric