From: Heiko Carstens <hca@linux.ibm.com>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Harald Freudenberger <freude@linux.ibm.com>,
Stefan Liebler <stli@linux.ibm.com>,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-s390@vger.kernel.org
Subject: Re: [PATCH 7/7] s390/vdso: Wire up getrandom() vdso implementation
Date: Fri, 13 Sep 2024 19:37:46 +0200 [thread overview]
Message-ID: <20240913173746.30385-D-hca@linux.ibm.com> (raw)
In-Reply-To: <ZuRS0sz_9_mkHsnl@zx2c4.com>
On Fri, Sep 13, 2024 at 04:57:22PM +0200, Jason A. Donenfeld wrote:
> On Fri, Sep 13, 2024 at 04:16:51PM +0200, Heiko Carstens wrote:
> > On Fri, Sep 13, 2024 at 03:53:43PM +0200, Jason A. Donenfeld wrote:
> > > On Fri, Sep 13, 2024 at 03:05:43PM +0200, Heiko Carstens wrote:
> > > > The vdso testcases vdso_test_getrandom and vdso_test_chacha pass.
> > >
> > > I'd be curious to see the results of ./vdso_test_getrandom bench-single
> > > and such.
> >
> > It looks like this with two layers of hypervisors in between, but that
> > shouldn't matter too much for this type of workload:
> >
> > $ ./vdso_test_getrandom bench-single
> > vdso: 25000000 times in 0.493703559 seconds
> > libc: 25000000 times in 6.371764073 seconds
> > syscall: 25000000 times in 6.584025337 seconds
>
> Cool. I'll amend that to the commit message, perhaps, so we have some
> historical snapshot of what it does. What cpu generation/model is this?
That was on a z16 machine.
next prev parent reply other threads:[~2024-09-13 17:37 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-13 13:05 [PATCH 0/7] s390/vdso: getrandom() vdso implementation Heiko Carstens
2024-09-13 13:05 ` [PATCH 1/7] s390/facility: Disable compile time optimization for decompressor code Heiko Carstens
2024-09-13 13:05 ` [PATCH 2/7] s390/alternatives: Remove ALT_FACILITY_EARLY Heiko Carstens
2024-09-13 13:05 ` [PATCH 3/7] s390/facility: Let test_facility() generate static branch if possible Heiko Carstens
2024-09-13 13:05 ` [PATCH 4/7] s390/module: Provide find_section() helper Heiko Carstens
2024-09-13 13:05 ` [PATCH 5/7] s390/vdso: Allow alternatives in vdso code Heiko Carstens
2024-09-13 13:05 ` [PATCH 6/7] s390/vdso: Move vdso symbol handling to separate header file Heiko Carstens
2024-09-13 13:05 ` [PATCH 7/7] s390/vdso: Wire up getrandom() vdso implementation Heiko Carstens
2024-09-13 13:53 ` Jason A. Donenfeld
2024-09-13 14:16 ` Heiko Carstens
2024-09-13 14:57 ` Jason A. Donenfeld
2024-09-13 17:37 ` Heiko Carstens [this message]
2024-09-13 14:13 ` Harald Freudenberger
2024-09-13 15:13 ` Jason A. Donenfeld
2024-09-13 15:22 ` Jason A. Donenfeld
2024-09-13 15:24 ` Jason A. Donenfeld
2024-09-13 17:32 ` Heiko Carstens
2024-09-13 19:23 ` Jason A. Donenfeld
2024-09-14 17:42 ` Heiko Carstens
2024-09-14 23:11 ` [PATCH] selftests: vDSO: check cpu caps before running chacha test Jason A. Donenfeld
2024-09-16 9:08 ` [PATCH 7/7] s390/vdso: Wire up getrandom() vdso implementation Jason A. Donenfeld
2024-09-16 11:01 ` Heiko Carstens
2024-09-16 11:23 ` Jason A. Donenfeld
2024-09-13 13:52 ` [PATCH 0/7] s390/vdso: " Jason A. Donenfeld
2024-09-13 13:56 ` Jason A. Donenfeld
2024-09-13 14:29 ` Heiko Carstens
2024-09-13 14:57 ` Jason A. Donenfeld
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