xdp
所属分类：Linux/Unix编程
开发工具：GO
文件大小：0KB
下载次数：0
上传日期：2023-02-25 07:48:50
上 传 者：
sh-1993
说明： Package-xdp允许使用Go编程语言中的xdp套接字。
(Package xdp allows one to use XDP sockets from the Go programming language.)
文件列表:
LICENSE (1531, 2022-02-12)
examples/ (0, 2022-02-12)
examples/dumpframes/ (0, 2022-02-12)
examples/dumpframes/dumpframes.go (3735, 2022-02-12)
examples/dumpframes/ebpf/ (0, 2022-02-12)
examples/dumpframes/ebpf/Dockerfile (528, 2022-02-12)
examples/dumpframes/ebpf/Makefile (128, 2022-02-12)
examples/dumpframes/ebpf/include/ (0, 2022-02-12)
examples/dumpframes/ebpf/include/Makefile (224, 2022-02-12)
examples/dumpframes/ebpf/include/bpf/ (0, 2022-02-12)
examples/dumpframes/ebpf/include/bpf/bpf_endian.h (3750, 2022-02-12)
examples/dumpframes/ebpf/include/bpf/bpf_helper_defs.h (121588, 2022-02-12)
examples/dumpframes/ebpf/include/bpf/bpf_helpers.h (1875, 2022-02-12)
examples/dumpframes/ebpf/ipproto.go (946, 2022-02-12)
examples/dumpframes/ebpf/ipproto_bpfeb.go (48969, 2022-02-12)
examples/dumpframes/ebpf/ipproto_bpfel.go (48975, 2022-02-12)
examples/dumpframes/ebpf/single_protocol_filter.c (2058, 2022-02-12)
examples/dumpframes/ebpf/single_protocol_filter.go (1069, 2022-02-12)
examples/l2fwd/ (0, 2022-02-12)
examples/l2fwd/l2fwd.go (6068, 2022-02-12)
examples/l2fwd/vagrant/ (0, 2022-02-12)
examples/l2fwd/vagrant/client/ (0, 2022-02-12)
examples/l2fwd/vagrant/client/Vagrantfile (743, 2022-02-12)
examples/l2fwd/vagrant/client/setup_experiment.sh (186, 2022-02-12)
examples/l2fwd/vagrant/l2fwd/ (0, 2022-02-12)
examples/l2fwd/vagrant/l2fwd/50-memlock.conf (20, 2022-02-12)
examples/l2fwd/vagrant/l2fwd/Vagrantfile (1246, 2022-02-12)
examples/l2fwd/vagrant/l2fwd/setup_experiment.sh (277, 2022-02-12)
examples/l2fwd/vagrant/server/ (0, 2022-02-12)
examples/l2fwd/vagrant/server/Vagrantfile (710, 2022-02-12)
examples/l2fwd/vagrant/server/setup_experiment.sh (186, 2022-02-12)
examples/rebroadcast/ (0, 2022-02-12)
examples/rebroadcast/rebroadcast.go (4571, 2022-02-12)
examples/senddnsqueries/ (0, 2022-02-12)
... ...
# xdp
[](https://pkg.go.dev/github.com/asavie/xdp)
Package github.com/asavie/xdp allows one to use [XDP sockets](https://lwn.net/Articles/750845/) from the Go programming language.
For usage examples, see the [documentation](https://pkg.go.dev/github.com/asavie/xdp) or the [examples/](https://github.com/asavie/xdp/tree/master/examples) directory.
## Performance
### examples/sendudp
With the default UDP payload size of 1400 bytes, running on Linux kernel
5.1.20, on a
[tg3](https://github.com/torvalds/linux/blob/master/drivers/net/ethernet/broadcom/tg3.c)
(so no native XDP support) gigabit NIC,
[sendudp.go](https://github.com/asavie/xdp/blob/master/examples/sendudp/sendudp.go)
does around 980 Mb/s, so practically line rate.
### examples/senddnsqueries
TL;DR: in the same environment, sending a pre-generated DNS query using an
ordinary UDP socket yields around 30 MiB/s whereas sending it using the
[senddnsqueries.go](https://github.com/asavie/xdp/blob/master/examples/senddnsqueries/senddnsqueries.go)
example program yields around 77 MiB/s.
Connecting a PC with Intel Core i7-7700 CPU running Linux kernel 5.0.17 and igb
driver to a laptop with Intel Core i7-5600U CPU running Linux kernel 5.0.9 with
e1000e with a cat 5E gigabit ethernet cable and using the following program
```go
package main
import (
"net"
"github.com/miekg/dns"
)
func main() {
query := new(dns.Msg)
query.SetQuestion(dns.Fqdn("asavie.com"), dns.TypeA)
payload, err := query.Pack()
if err != nil {
panic(err)
}
conn, err := net.ListenPacket("udp", ":0")
if err != nil {
panic(err)
}
defer conn.Close()
dst, err := net.ResolveUDPAddr("udp", "192.168.111.10:53")
if err != nil {
panic(err)
}
for {
_, err = conn.WriteTo(payload, dst)
if err != nil {
panic(err)
}
}
}
```
which uses an ordinary UDP socket to send a pre-generated DNS query from PC to
laptop as quickly as possible - I get about 30 MiB/s at laptop side.
Using the [senddnsqueries.go](https://github.com/asavie/xdp/blob/master/examples/senddnsqueries/senddnsqueries.go)
example program - I get about 77 MiB/s at laptop side.
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