[2/3] dma/idxd: configure max batch size to high value
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Commit Message
When configuring an Intel DSA instance using the utility script
dpdk_idxd_cfg.py, explicitly set the max supported batch size value to a
high value, to ensure large bursts are supported if so desired. The
default in the linux kernel is now just 32 [1], which may not be
sufficient for all DPDK apps.
[1] https://lore.kernel.org/r/163528473483.3926048.7950067926287180976.stgit@djiang5-desk3.ch.intel.com
Cc: stable@dpdk.org
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
Note: although not fixing a bug in DPDK itself, due to kernel changes
this patch should be considered for backport as a fix, so cc'ing stable.
---
drivers/dma/idxd/dpdk_idxd_cfg.py | 1 +
1 file changed, 1 insertion(+)
Comments
On 16/02/2022 16:06, Bruce Richardson wrote:
> When configuring an Intel DSA instance using the utility script
> dpdk_idxd_cfg.py, explicitly set the max supported batch size value to a
> high value, to ensure large bursts are supported if so desired. The
> default in the linux kernel is now just 32 [1], which may not be
> sufficient for all DPDK apps.
>
> [1] https://lore.kernel.org/r/163528473483.3926048.7950067926287180976.stgit@djiang5-desk3.ch.intel.com
>
> Cc: stable@dpdk.org
>
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
> Note: although not fixing a bug in DPDK itself, due to kernel changes
> this patch should be considered for backport as a fix, so cc'ing stable.
> ---
> drivers/dma/idxd/dpdk_idxd_cfg.py | 1 +
> 1 file changed, 1 insertion(+)
>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
@@ -89,6 +89,7 @@ def configure_dsa(dsa_id, queues, prefix):
"mode": "dedicated",
"name": f"{prefix}_wq{dsa_id}.{q}",
"priority": 1,
+ "max_batch_size": 1024,
"size": int(max_work_queues_size / nb_queues)})
# enable device and then queues