The default number of ethernet queues per port is currently set to
1k which is more than enough for most applications, but still is lower
than the total number of queues which may be available on modern NICs.
Rather than increasing the max queues further, which will increase
the memory footprint (since the value is used in array dimensioning),
we can instead make the value a meson tunable option - and reduce the
default value to 256 in the process. This means that:
* most apps which don't need hundreds of queues will see lower mem use.
* apps which do need to use thousands of queues can configure DPDK to
allow this, without having to modify DPDK files (i.e. rte_config.h)
Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
---
config/meson.build | 1 +
config/rte_config.h | 1 -
meson_options.txt | 2 ++
3 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/config/meson.build b/config/meson.build
index 8c8b019c25..e9e40ce874 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -352,6 +352,7 @@ endforeach
# set other values pulled from the build options
dpdk_conf.set('RTE_MAX_ETHPORTS', get_option('max_ethports'))
+dpdk_conf.set('RTE_MAX_QUEUES_PER_PORT', get_option('max_queues_per_ethport'))
dpdk_conf.set('RTE_LIBEAL_USE_HPET', get_option('use_hpet'))
dpdk_conf.set('RTE_ENABLE_STDATOMIC', get_option('enable_stdatomic'))
dpdk_conf.set('RTE_ENABLE_TRACE_FP', get_option('enable_trace_fp'))
diff --git a/config/rte_config.h b/config/rte_config.h
index dd7bb0d35b..eec1932d0f 100644
--- a/config/rte_config.h
+++ b/config/rte_config.h
@@ -64,7 +64,6 @@
#define RTE_MBUF_DEFAULT_MEMPOOL_OPS "ring_mp_mc"
/* ether defines */
-#define RTE_MAX_QUEUES_PER_PORT 1024
#define RTE_ETHDEV_QUEUE_STAT_CNTRS 16 /* max 256 */
#define RTE_ETHDEV_RXTX_CALLBACKS 1
#define RTE_MAX_MULTI_HOST_CTRLS 4
diff --git a/meson_options.txt b/meson_options.txt
index e49b2fc089..e5e94dc4bf 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -44,6 +44,8 @@ option('max_lcores', type: 'string', value: 'default',
description:
'Set maximum number of cores/threads supported by EAL; "default" is
different per-arch, "detect" detects the number of cores on the build machine.')
option('max_numa_nodes', type: 'string', value: 'default', description:
'Set the highest NUMA node supported by EAL; "default" is different
per-arch, "detect" detects the highest NUMA node on the build machine.')
+option('max_queues_per_ethport', type: 'integer', value: 256, description:
+ 'maximum number of queues on an Ethernet device')
option('enable_iova_as_pa', type: 'boolean', value: true, description:
'Support the use of physical addresses for IO addresses, such as used
by UIO or VFIO in no-IOMMU mode. When disabled, DPDK can only run with IOMMU
support for address mappings, but will have more space available in the mbuf
structure.')
option('mbuf_refcnt_atomic', type: 'boolean', value: true, description:
--
2.43.0
