RE: [PATCH] doc: add limitation in using segment-sz in crypto-perf

[Hemant Agrawal <hemant.agrawal@nxp.com>]

> -----Original Message-----
> From: Anoob Joseph <anoobj@marvell.com>
> Sent: 16 May 2025 20:11
> To: Akhil Goyal <gakhil@marvell.com>; dev@dpdk.org
> Cc: suanmingm@nvidia.com; kai.ji@intel.com; Hemant Agrawal
> <hemant.agrawal@nxp.com>; brian.dooley@intel.com; Akhil Goyal
> <gakhil@marvell.com>
> Subject: RE: [PATCH] doc: add limitation in using segment-sz in crypto-perf
> Importance: High
> 
> > Subject: [PATCH] doc: add limitation in using segment-sz in
> > crypto-perf
> >
> > When segment-sz is given as parameter, use buffer-sz in descending
> > order.
> > The reason is, same scatter gather buffer list is being used for all
> > packet sizes which is initialized once in the beginning.
> > Now if a small packet case is run first, mbuf SG list will be trimmed
> > to a smaller number of SG and rest of the SGs are lost resulting in segfault.
> > Buffers cannot be re-initialized as that will come in datapath and will be
> costly.
> > So to workaround this, if segment-sz is passed as argument, use values
> > in buffer-sz in descending order.
> >
> > Signed-off-by: Akhil Goyal <gakhil@marvell.com>
> 
> Acked-by: Anoob Joseph <anoobj@marvell.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>