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There's a lot of code in netdev-dpdk which is not at all related to the
netdev interface, mostly the library initialization code.
This commit moves it to a new 'dpdk' module, to simplify 'netdev-dpdk'.
Also a new module 'dpdk-stub' is introduced to implement some functions
when DPDK is not available. This replaces the old 'netdev-nodpdk'
module.
Some redundant includes are removed or reorganized as a consequence.
No functional change.
CC: Aaron Conole <aconole@redhat.com>
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Tested-by: Aaron Conole <aconole@redhat.com>
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Looks like we forgot to add the copyright headers to netdev-dpdk.h.
Looking at the contribution history of the file, this commit adds the
header with Nicira copyright.
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Acked-by: Ben Pfaff <blp@ovn.org>
Acked-by: Aaron Conole <aconole@redhat.com>
Tested-by: Aaron Conole <aconole@redhat.com>
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This commit moves the code that sets the pmd threads affinity from
netdev-dpdk to ovs-numa. There's one small part left in netdev-dpdk, to
set the lcore_id.
Now dpif-netdev will call both modules (ovs-numa and netdev-dpdk) when
starting a pmd thread.
This change will allow having a dummy implementation of the set affinity
call, for testing purposes.
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Acked-by: Ilya Maximets <i.maximets@samsung.com>
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Existing DPDK integration is provided by use of command line options which
must be split out and passed to librte in a special manner. However, this
forces any configuration to be passed by way of a special DPDK flag, and
interferes with ovs+dpdk packaging solutions.
This commit delays dpdk initialization until after the OVS database
connection is established, at which point ovs initializes librte. It
pulls all of the config data from the OVS database, and assembles a
new argv/argc pair to be passed along.
Signed-off-by: Aaron Conole <aconole@redhat.com>
Acked-by: Kevin Traynor <kevin.traynor@intel.com>
Acked-by: Daniele Di Proietto <diproiettod@vmware.com>
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We used to reserve DPDK lcore 0 for non pmd operations, making it
difficult to use core 0 for packet processing.
DPDK 2.0 properly support non EAL threads with lcore LCORE_ID_ANY.
Using non EAL threads for non pmd threads, we do not need to reserve
any core for non pmd operations
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
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DPDK lcore_id is unsigned. We need to support big values like
LCORE_ID_ANY (=UINT32_MAX). Therefore I am changing the type everywhere
in OVS.
Signed-off-by: Daniele Di Proietto <diproiettod@vmware.com>
Signed-off-by: Ethan Jackson <ethan@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>
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dp_packet is short and better name for datapath packet
structure.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
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For testing purpose, developers may want to change the NON_PMD_CORE_ID
and use a different core for non-pmd threads. Since the netdev-dpdk
module is hard-coded to assert the non-pmd threads using core 0, such
change will cause abortion of OVS.
This commit fixes the assertion and allows changing NON_PMD_CORE_ID.
Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
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With DPDK compiled in, when the --dpdk option was given other than as the
first command-line argument, ovs-vswitchd silently ignored it. Without
DPDK compiled in, when the --dpdk option was given anywhere, ovs-vswitchd
silently ignored it. However, in each case any options following --dpdk
were not ignored, and since --dpdk is normally followed by additional
DPDK-specific options, this caused even more confusing trouble.
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Daniele Di Proietto <ddiproietto@vmware.com>
Tested-by: Daniele Di Proietto <ddiproietto@vmware.com>
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DPDK mempools rely on rte_lcore_id() to implement a thread-local cache.
Our non pmd threads had rte_lcore_id() == 0. This allowed concurrent access to
the "thread-local" cache, causing crashes.
This commit resolves the issue with the following changes:
- Every non pmd thread has the same lcore_id (0, for management reasons), which
is not shared with any pmd thread (lcore_id for pmd threads now start from 1)
- DPDK mbufs must be allocated/freed in pmd threads. When there is the need to
use mempools in non pmd threads, like in dpdk_do_tx_copy(), a mutex must be
held.
- The previous change does not allow us anymore to pass DPDK mbufs to handler
threads: therefore this commit partially revert 143859ec63d45e. Now packets
are copied for upcall processing. We can remove the extra memcpy by
processing upcalls in the pmd thread itself.
With the introduction of the extra locking, the packet throughput will be lower
in the following cases:
- When using internal (tap) devices with DPDK devices on the same datapath.
Anyway, to support internal devices efficiently, we needed DPDK KNI devices,
which will be proper pmd devices and will not need this locking.
- When packets are processed in the slow path by non pmd threads. This overhead
can be avoided by handling the upcalls directly in pmd threads (a change that
has already been proposed by Ryan Wilson)
Also, the following two fixes have been introduced:
- In dpdk_free_buf() use rte_pktmbuf_free_seg() instead of rte_mempool_put().
This allows OVS to run properly with CONFIG_RTE_LIBRTE_MBUF_DEBUG DPDK option
- Do not bulk free mbufs in a transmission queue. They may belong to different
mempools
Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
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Shared memory ring patch
This patch enables the client dpdk rings within the netdev-dpdk. It adds
a new dpdk device called dpdkr (other naming suggestions?). This allows
for the use of shared memory to communicate with other dpdk applications,
on the host or within a virtual machine. Instructions for use are in
INSTALL.DPDK.
This has been tested on Intel multi-core platforms and with the client
application within the host.
Signed-off-by: Gerald Rogers <gerald.rogers@intel.com>
Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
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This commit introduces a new data structure used for receiving packets from
netdevs and passing them to dpifs.
The purpose of this change is to allow storing some private data for each
packet. The subsequent commits make use of it.
Signed-off-by: Daniele Di Proietto <ddiproietto@vmware.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
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Building OVS tree without DPDK produced the following warning message:
lib/dpif-netdev.c:1868:5: error: statement with no effect
This error message is complaining the return value of the following
macro not being used.
#define pmd_thread_setaffinity_cpu(c) (0)
The patch fixed this warnning by making the stub functions
as inline funtions.
Signed-off-by: Andy Zhou <azhou@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
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DPDK need to set _lcore_id for using multiple core.
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@redhat.com>
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Following patch adds DPDK netdev-class to userspace datapath. Now
OVS can use DPDK port for IO by just configuring DPDK port and then
adding dpdk type port to userspace datapath.
Refer to INSTALL.DPDK doc for further info.
This is based a patch from Gerald Rogers.
Signed-off-by: Gerald Rogers <gerald.rogers@intel.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Thomas Graf <tgraf@redhat.com>
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