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https://github.com/openvswitch/ovs
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43307ad0e2
This commit re-introduces the concept of shared mempools as the default memory model for DPDK devices. Per port mempools are still available but must be enabled explicitly by a user. OVS previously used a shared mempool model for ports with the same MTU and socket configuration. This was replaced by a per port mempool model to address issues flagged by users such as: https://mail.openvswitch.org/pipermail/ovs-discuss/2016-September/042560.html However the per port model potentially requires an increase in memory resource requirements to support the same number of ports and configuration as the shared port model. This is considered a blocking factor for current deployments of OVS when upgrading to future OVS releases as a user may have to redimension memory for the same deployment configuration. This may not be possible for users. This commit resolves the issue by re-introducing shared mempools as the default memory behaviour in OVS DPDK but also refactors the memory configuration code to allow for per port mempools. This patch adds a new global config option, per-port-memory, that controls the enablement of per port mempools for DPDK devices. ovs-vsctl set Open_vSwitch . other_config:per-port-memory=true This value defaults to false; to enable per port memory support, this field should be set to true when setting other global parameters on init (such as "dpdk-socket-mem", for example). Changing the value at runtime is not supported, and requires restarting the vswitch daemon. The mempool sweep functionality is also replaced with the sweep functionality from OVS 2.9 found in commits c77f692 (netdev-dpdk: Free mempool only when no in-use mbufs.) a7fb0a4 (netdev-dpdk: Add mempool reuse/free debug.) A new document to discuss the specifics of the memory models and example memory requirement calculations is also added. Signed-off-by: Ian Stokes <ian.stokes@intel.com> Acked-by: Kevin Traynor <ktraynor@redhat.com> Acked-by: Tiago Lam <tiago.lam@intel.com> Tested-by: Tiago Lam <tiago.lam@intel.com>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
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* Copyright (c) 2014, 2015, 2016 Nicira, Inc.
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* Copyright (c) 2016 Red Hat, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "dpdk.h"
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#include "smap.h"
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#include "ovs-thread.h"
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#include "openvswitch/vlog.h"
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#include "vswitch-idl.h"
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VLOG_DEFINE_THIS_MODULE(dpdk);
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void
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dpdk_init(const struct smap *ovs_other_config)
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{
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if (smap_get_bool(ovs_other_config, "dpdk-init", false)) {
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static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
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if (ovsthread_once_start(&once)) {
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VLOG_ERR("DPDK not supported in this copy of Open vSwitch.");
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ovsthread_once_done(&once);
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}
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}
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}
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void
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dpdk_set_lcore_id(unsigned cpu OVS_UNUSED)
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{
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/* Nothing */
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}
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const char *
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dpdk_get_vhost_sock_dir(void)
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{
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return NULL;
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}
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bool
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dpdk_vhost_iommu_enabled(void)
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{
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return false;
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}
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bool
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dpdk_per_port_memory(void)
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{
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return false;
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}
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void
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print_dpdk_version(void)
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{
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}
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void
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dpdk_status(const struct ovsrec_open_vswitch *cfg)
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{
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if (cfg) {
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ovsrec_open_vswitch_set_dpdk_initialized(cfg, false);
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ovsrec_open_vswitch_set_dpdk_version(cfg, "none");
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}
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}
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