From: Thomas Monjalon <thomas@monjalon.net>
To: ferruh.yigit@intel.com, bruce.richardson@intel.com,
konstantin.ananyev@intel.com
Cc: stable@dpdk.org, keith.wiles@intel.com,
Yongseok Koh <yskoh@mellanox.com>,
dev@dpdk.org, Shahaf Shuler <shahafs@mellanox.com>,
anatoly.burakov@intel.com, justin.parus@microsoft.com,
christian.ehrhardt@canonical.com, david.coronel@canonical.com,
josh.powers@canonical.com, jay.vosburgh@canonical.com,
dan.streetman@canonical.com
Subject: Re: [dpdk-stable] AVX512 bug on SkyLake
Date: Sat, 10 Nov 2018 03:13:29 +0100 [thread overview]
Message-ID: <15598804.PupyfcORSR@xps> (raw)
In-Reply-To: <1612642.At0RDolh7h@xps>
Below is my conclusion for this bug.
An expert of x86 is required to follow-up.
Summary:
- CPU: Intel Skylake
- Linux environment: Ubuntu 18.04
- Compiler: GCC 7 or 8
- Scenario: testpmd crashes when it starts forwarding
- Behaviour: AVX2 version of rte_memcpy() fails if optimized for AVX512
- Context: inline rte_memcpy() is called from
inline rte_mempool_put_bulk(), called from
mlx5_tx_complete() (inline or not)
- Analysis: AVX512 optimization changes vmovdqu to vmovdqu8
Latest status can be found in Bugzilla:
https://bugs.dpdk.org/show_bug.cgi?id=97#c35
next prev parent reply other threads:[~2018-11-10 2:13 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-23 21:23 [PATCH] build: disable compiler AVX512F support Yongseok Koh
2018-11-01 23:11 ` Thomas Monjalon
2018-11-02 12:42 ` [dpdk-stable] " Ferruh Yigit
2018-11-02 13:48 ` Ferruh Yigit
2018-11-02 20:59 ` Yongseok Koh
2018-11-02 21:46 ` Ferruh Yigit
2018-11-02 23:31 ` Yongseok Koh
2018-11-02 21:04 ` [PATCH v2] " Yongseok Koh
2018-11-05 14:06 ` Wiles, Keith
2018-11-06 21:30 ` Yongseok Koh
2018-11-07 9:04 ` Wiles, Keith
2018-11-08 15:59 ` AVX512 bug on SkyLake Thomas Monjalon
2018-11-08 17:21 ` Ferruh Yigit
2018-11-08 23:01 ` Yongseok Koh
2018-11-09 6:27 ` Christian Ehrhardt
2018-11-09 9:49 ` Ferruh Yigit
2018-11-09 11:35 ` Thomas Monjalon
2018-11-09 10:03 ` Ferruh Yigit
2018-11-09 13:17 ` [dpdk-stable] " Thomas Monjalon
2018-11-09 14:27 ` Thomas Monjalon
2018-11-09 20:06 ` Ferruh Yigit
2018-11-09 18:46 ` Stephen Hemminger
2018-11-10 2:13 ` Thomas Monjalon [this message]
2018-11-11 14:15 ` [dpdk-stable] " Ananyev, Konstantin
2018-11-11 18:15 ` Thomas Monjalon
2018-11-12 9:09 ` Christian Ehrhardt
2018-11-12 9:21 ` Thomas Monjalon
2018-11-12 9:26 ` Ananyev, Konstantin
2018-11-03 1:06 ` [PATCH v3] build: disable gcc AVX512F support Yongseok Koh
2018-11-04 20:56 ` Thomas Monjalon
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