- 27 Mar, 2017 11 commits
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Alexander Duyck authored
Update the driver code so that we do bulk updates of the page reference count instead of just incrementing it by one reference at a time. The advantage to doing this is that we cut down on atomic operations and this in turn should give us a slight improvement in cycles per packet. In addition if we eventually move this over to using build_skb the gains will be more noticeable. I also found and fixed a store forwarding stall from where we were assigning "*new_buff = *old_buff". By breaking it up into individual copies we can avoid this and as a result the performance is slightly improved. Change-ID: I1d3880dece4133eca3c32423b04a5467321ccc52 Signed-off-by:
Alexander Duyck <alexander.h.duyck@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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David Lebrun authored
When CONFIG_IPV6_SEG6_LWTUNNEL is selected, automatically select DST_CACHE. This allows to remove multiple ifdefs. Signed-off-by:
David Lebrun <david.lebrun@uclouvain.be> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tobias Klauser authored
The ibmvnic driver keeps its statistics in net_device->stats, so the net_stats member in struct ibmvnic_adapter is unused. Remove it. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Tobias Klauser authored
The ibmveth driver keeps its statistics in net_device->stats, so the stats member in struct ibmveth_adapter is unused. Remove it. Signed-off-by:
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Tobias Klauser authored
The bfin_mac driver keeps its statistics in net_device->stats, so the stats member in struct bfin_mac_local is unused. Remove it, as well as the accompanying comment. Cc: adi-buildroot-devel@lists.sourceforge.net Signed-off-by:
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Colin Ian King authored
ndev is being checked to see if it is a null pointer however before the null check ndev is being dereferenced; hence there is a potential null pointer dereference bug that needs fixing. Fix this by only dereferencing ndev after the null check. Detected by CoverityScan, CID#1420760, CID#140761 ("Dereference before null check") Signed-off-by:Colin Ian King <colin.king@canonical.com> Reviewed-by:
Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by:
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Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. As I don't have the hardware, I'd be very pleased if someone may test this patch. Signed-off-by:Philippe Reynes <tremyfr@gmail.com> Signed-off-by:
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Philippe Reynes authored
The ethtool api {get|set}_settings is deprecated. We move this driver to new api {get|set}_link_ksettings. As I don't have the hardware, I'd be very pleased if someone may test this patch. Signed-off-by: -
David S. Miller authored
David Ahern says: ==================== net: mpls: multipath route cleanups When a device associated with a nexthop is deleted, the nexthop in the route is effectively removed, so remove it from the route dump. Further, when all nexhops have been deleted the route is effectively done, so remove the route. ==================== Signed-off-by: -
David Ahern authored
When all devices for all nexthops in a route have been deleted, the route is effectively dead, so remove it. Signed-off-by:
David Ahern <dsa@cumulusnetworks.com> Acked-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
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David Ahern authored
If the device for a nexthop in a multipath route is deleted, the nexthop is effectively removed from the route. Currently, a route dump still returns the nexhop though without the device set: $ ip -f mpls ro ls 100 nexthopvia inet 10.11.1.2 dev br0 nexthopvia inet 10.100.3.1 dev eth3 $ ip li del br0 $ ip -f mpls ro ls 100 nexthopvia inet 10.11.1.2 dev * dead linkdown nexthopvia inet 10.100.3.1 dev eth3 Since the nexthop is effectively deleted, drop the hop from the route dump. Signed-off-by:
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- 26 Mar, 2017 10 commits
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David S. Miller authored
K. Y. Srinivasan says: ==================== netvsc: Fix miscellaneous issues Fix miscellaneous issues. ==================== Signed-off-by: -
K. Y. Srinivasan authored
Initialize the return value correctly. Signed-off-by:
K. Y. Srinivasan <kys@microsoft.com> Signed-off-by:
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K. Y. Srinivasan authored
All netvsc channels are handled via NAPI. Setup the "read mode" correctly for the netvsc sub-channels. Signed-off-by:
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David S. Miller authored
Jonas Bonn says: ==================== GTP SGSN-side tunnel Changes since v4: * Respin the series on top of net-next; the conflicts were trivial, amounting to just code having been shifted about ==================== Signed-off-by: -
Jonas Bonn authored
The GTP-tunnel driver is explicitly GGSN-side as it searches for PDP contexts based on the incoming packets _destination_ address. If we want to place ourselves on the SGSN side of the tunnel, then we want to be identifying PDP contexts based on _source_ address. Let it be noted that in a "real" configuration this module would never be used: the SGSN normally does not see IP packets as input. The justification for this functionality is for PGW load-testing applications where the input to the SGSN is locally generally IP traffic. This patch adds a "role" argument at GTP-link creation time to specify whether we are on the GGSN or SGSN side of the tunnel; this flag is then used to determine which part of the IP packet to use in determining the PDP context. Signed-off-by:
Jonas Bonn <jonas@southpole.se> Acked-by:
Pablo Neira Ayuso <pablo@netfilter.org> Acked-by:
Harald Welte <laforge@gnumonks.org> Signed-off-by:
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Jonas Bonn authored
This is a mostly cosmetic rename of the SGSN netlink attribute to the GTP link. The justification for this is that we will be making the module support decapsulation of "downstream" SGSN packets, in which case the netlink parameter actually refers to the upstream GGSN peer. Renaming the parameter makes the relationship clearer. The legacy name is maintained as a define in the header file in order to not break existing code. Signed-off-by:
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David S. Miller authored
Daniele Palmas says: ==================== net: usb: qmi_wwan: add qmap mux protocol support This patch adds support for qmap mux protocol available in recent Qualcomm based modems. The qmap mux protocol can be used for multiplexing data packets in order to have multiple ip streams through the same physical device. Two new sysfs files are added for adding/removing the qmap mux based interfaces (named qmimux): /sys/class/net/<iface>/qmi/add_mux /sys/class/net/<iface>/qmi/del_mux Main patch author is Bjørn Mork <bjorn@mork.no> An userspace implementation of the qmi requests needed to support multiple ip streams is already available (namely libqmi since version 1.18.0). The qmap mux feature has been recently implemented in Codeaurora gobinet out-of-kernel driver that was the inspiration for this development. Tests have been performed with Telit LE922A6 (PID 0x1040) ==================== Signed-off-by: -
Daniele Palmas authored
This patch updates the documentation related to the new files added for qmap mux support. Signed-off-by:
Daniele Palmas <dnlplm@gmail.com> Signed-off-by:
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Daniele Palmas authored
This patch adds support for qmap mux protocol available in recent Qualcomm based modems. The qmap mux protocol can be used for multiplexing data packets in order to have multiple ip streams through the same physical device. Two new sysfs files are added for adding/removing the qmap mux based interfaces (named qmimux): - /sys/class/net/<iface>/qmi/add_mux - /sys/class/net/<iface>/qmi/del_mux Main patch author is Bjørn Mork <bjorn@mork.no> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
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Arkadi Sharshevsky authored
Currently the return allocated index and err value are multiplexed. This patch changes the API to decouple the ret value from the allocated index. Signed-off-by:
Arkadi Sharshevsky <arkadis@mellanox.com> Reviewed-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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- 25 Mar, 2017 19 commits
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David S. Miller authored
Alexander Duyck says: ==================== Add busy poll support for epoll This patch set adds support for using busy polling with epoll. The main idea behind this is that we record the NAPI ID for the last event that is moved onto the ready list for the epoll context and then when we no longer have any events on the ready list we begin polling with that ID. If the busy polling does not yield any events then we will reset the NAPI ID to 0 and wait until a new event is added to the ready list with a valid NAPI ID before we will resume busy polling. Most of the changes in this set authored by me are meant to be cleanup or fixes for various things. For example, I am trying to make it so that we don't perform hash look-ups for the NAPI instance when we are only working with sender_cpu and the like. At the heart of this set is the last 3 patches which enable epoll support and add support for obtaining the NAPI ID of a given socket. With these it becomes possible for an application to make use of epoll and get optimal busy poll utilization by stacking multiple sockets with the same NAPI ID on the same epoll context. v1: The first version of this series only allowed epoll to busy poll if all of the sockets with a NAPI ID shared the same NAPI ID. I feel we were too strict with this requirement, so I changed the behavior for v2. v2: The second version was pretty much a full rewrite of the first set. The main changes consisted of pulling apart several patches to better address the need to clean up a few items and to make the code easier to review. In the set however I went a bit overboard and was trying to fix an issue that would only occur with 500+ years of uptime, and in the process limited the range for busy_poll/busy_read unnecessarily. v3: Split off the code for limiting busy_poll and busy_read into a separate patch for net. Updated patch that changed busy loop time tracking so that it uses "local_clock() >> 10" as we originally did. Tweaked "Change return type.." patch by moving declaration of "work" inside the loop where is was accessed and always reset to 0. Added "Acked-by" for patches that received acks. ==================== Signed-off-by: -
Sridhar Samudrala authored
This socket option returns the NAPI ID associated with the queue on which the last frame is received. This information can be used by the apps to split the incoming flows among the threads based on the Rx queue on which they are received. If the NAPI ID actually represents a sender_cpu then the value is ignored and 0 is returned. Signed-off-by:
Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Sridhar Samudrala authored
This patch adds busy poll support to epoll. The implementation is meant to be opportunistic in that it will take the NAPI ID from the last socket that is added to the ready list that contains a valid NAPI ID and it will use that for busy polling until the ready list goes empty. Once the ready list goes empty the NAPI ID is reset and busy polling is disabled until a new socket is added to the ready list. In addition when we insert a new socket into the epoll we record the NAPI ID and assume we are going to receive events on it. If that doesn't occur it will be evicted as the active NAPI ID and we will resume normal behavior. An application can use SO_INCOMING_CPU or SO_REUSEPORT_ATTACH_C/EBPF socket options to spread the incoming connections to specific worker threads based on the incoming queue. This enables epoll for each worker thread to have only sockets that receive packets from a single queue. So when an application calls epoll_wait() and there are no events available to report, busy polling is done on the associated queue to pull the packets. Signed-off-by:
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Sridhar Samudrala authored
Move the core functionality in sk_busy_loop() to napi_busy_loop() and make it independent of sk. This enables re-using this function in epoll busy loop implementation. Signed-off-by:
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Alexander Duyck authored
This patch flips the logic we were using to determine if the busy polling has timed out. The main motivation for this is that we will need to support two different possible timeout values in the future and by recording the start time rather than when we would want to end we can focus on making the end_time specific to the task be it epoll or socket based polling. Signed-off-by:
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Alexander Duyck authored
checking the return value of sk_busy_loop. As there are only a few consumers of that data, and the data being checked for can be replaced with a check for !skb_queue_empty() we might as well just pull the code out of sk_busy_loop and place it in the spots that actually need it. Signed-off-by:
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Alexander Duyck authored
Instead of defining two versions of skb_mark_napi_id I think it is more readable to just match the format of the sk_mark_napi_id functions and just wrap the contents of the function instead of defining two versions of the function. This way we can save a few lines of code since we only need 2 of the ifdef/endif but needed 5 for the extra function declaration. Signed-off-by:
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Alexander Duyck authored
While working on some recent busy poll changes we found that child sockets were being instantiated without NAPI ID being set. In our first attempt to fix it, it was suggested that we should just pull programming the NAPI ID into the function itself since all callers will need to have it set. In addition to the NAPI ID change I have dropped the code that was populating the Rx hash since it was actually being populated in tcp_get_cookie_sock. Reported-by:
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Alexander Duyck authored
This patch is a cleanup/fix for NAPI IDs following the changes that made it so that sender_cpu and napi_id were doing a better job of sharing the same location in the sk_buff. One issue I found is that we weren't validating the napi_id as being valid before we started trying to setup the busy polling. This change corrects that by using the MIN_NAPI_ID value that is now used in both allocating the NAPI IDs, as well as validating them. Signed-off-by:
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David S. Miller authored
Saeed Mahameed says: ==================== Mellanox mlx5e XDP performance optimization This series provides some preformancee optimizations for mlx5e driver, especially for XDP TX flows. 1st patch is a simple change of rmb to dma_rmb in CQE fetch routine which shows a huge gain for both RX and TX packet rates. 2nd patch removes write combining logic from the driver TX handler and simplifies the TX logic while improving TX CPU utilization. All other patches combined provide some refactoring to the driver TX flows to allow some significant XDP TX improvements. More details and performance numbers per patch can be found in each patch commit message compared to the preceding patch. Overall performance improvemnets System: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz Test case Baseline Now improvement --------------------------------------------------------------- TX packets (24 threads) 45Mpps 54Mpps 20% TC stack Drop (1 core) 3.45Mpps 3.6Mpps 5% XDP Drop (1 core) 14Mpps 16.9Mpps 20% XDP TX (1 core) 10.4Mpps 13.7Mpps 31% ==================== Acked-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Saeed Mahameed authored
Different SQ types (tx, xdp, ico) are growing apart, we separate them and remove unwanted parts in each one of them, to simplify data path and utilize data cache. Remove DB union from SQ structures since it is not needed anymore as we now have different SQ data type for each SQ. Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Reviewed-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Saeed Mahameed authored
In the next patches we will introduce different SQ types, and we would want to reuse those functions, in this patch we make them agnostic to SQ type (txq, xdp, ico). Signed-off-by:
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Saeed Mahameed authored
Rename mlx5e_{create,destroy}_{sq,rq,cq} to mlx5e_{alloc,free}_{sq,rq,cq}. Rename mlx5e_{enable,disable}_{sq,rq,cq} to mlx5e_{create,destroy}_{sq,rq,cq}. mlx5e_{enable,disable}_{sq,rq,cq} used to actually create/destroy the SQ in FW, so we rename them to align the functions names with FW semantics. Signed-off-by: -
Saeed Mahameed authored
In the next patches we will introduce different SQ types, for that we here generalize some TX helper functions to work with more basic SQ parameters, in order to re-use them for the different SQ types. Signed-off-by:
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Saeed Mahameed authored
XDP SQ has a fixed size WQE (MLX5E_XDP_TX_WQEBBS = 1) and only posts one kind of WQE (MLX5_OPCODE_SEND), Also we initialize SQ descriptors static fields once on open_xdpsq, rather than every time on critical path. Optimize the code in light of those facts and add a prefetch of the TX descriptor first thing in the xdp xmit function. Performance improvement: System: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz Test case Before Now improvement --------------------------------------------------------------- XDP TX (1 core) 13Mpps 13.7Mpps 5% Signed-off-by:
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Saeed Mahameed authored
Handle XDP TX completions before handling RX packets, to make sure more free space is available for XDP TX packets a moment before handling RX packets. Performance improvement: System: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz Test case Before Now improvement --------------------------------------------------------------- XDP Drop (1 core) 16.9Mpps 16.9Mpps No change XDP TX (1 core) 12Mpps 13Mpps 8% Signed-off-by:
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Saeed Mahameed authored
To save many rq->channel->sq dereferences in fast-path. And rename it to xdpsq. Signed-off-by:
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Saeed Mahameed authored
Move struct mlx5e_rq and friends to appear after mlx5e_sq declaration in en.h. We will need this for next patch to move the mlx5e_sq instance into mlx5e_rq struct for XDP SQs. Signed-off-by:
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Saeed Mahameed authored
XDP code belongs to RX path, move mlx5e_poll_xdp_tx_cq and mlx5e_free_xdp_tx_descs to en_rx.c. Rename them to mlx5e_poll_xdpsq_cq and mlx5e_free_xdpsq_descs. Signed-off-by:
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