公司名稱 | 團隊 | 國家 |
---|---|---|
Firebase studio | USA | |
Shopify | USA | |
Replit | USA | |
D.E Shaw | Flox | USA |
Arista Network | USA | |
Anduril | USA | |
Anthropic | USA | |
Mercury.com | USA |
解決方法: 增加一個usleep在發送send()函數之前
驗證過程:增加bpf_printk, tcpdump, 更改鍵值大小
猜測:可能是ebpf從未更新快取拿到資料
理由:只要持續有封包就會使得程式無法完整釋放資源
結論:ktcp略優於ebpf 連結
對象 | 平均數 | 標準差 |
---|---|---|
kecho | 479 | 371 |
tcp-ebpf | 591 | 437 |
Learn More →
uname -a
Linux brianpan-Aspire-A14-52MT 6.11.0-17-generic #17~24.04.2-Ubuntu SMP PREEMPT_DYNAMIC Mon Jan 20 22:48:29 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
gcc --version
gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
sudo lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 42 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Vendor ID: GenuineIntel
BIOS Vendor ID: Intel(R) Corporation
Model name: Intel(R) Core(TM) Ultra 5 226V
BIOS Model name: Intel(R) Core(TM) Ultra 5 226V To Be Filled By O.E.M.
CPU @ 0.4GHz
BIOS CPU family: 773
CPU family: 6
Model: 189
Thread(s) per core: 1
Core(s) per socket: 8
Socket(s): 1
Stepping: 1
CPU(s) scaling MHz: 40%
CPU max MHz: 4500.0000
CPU min MHz: 400.0000
BogoMIPS: 6220.80
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge m
ca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 s
s ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc
art arch_perfmon pebs bts rep_good nopl xtopology nons
top_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq
dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma c
x16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt t
sc_deadline_timer aes xsave avx f16c rdrand lahf_lm ab
m 3dnowprefetch cpuid_fault epb intel_ppin ssbd ibrs i
bpb stibp ibrs_enhanced tpr_shadow flexpriority ept vp
id ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms
invpcid rdt_a rdseed adx smap clflushopt clwb intel_p
t sha_ni xsaveopt xsavec xgetbv1 xsaves split_lock_det
ect user_shstk avx_vnni lam wbnoinvd dtherm ida arat p
ln pts hwp hwp_notify hwp_act_window hwp_epp hwp_pkg_r
eq hfi vnmi umip pku ospke waitpkg gfni vaes vpclmulqd
q rdpid bus_lock_detect movdiri movdir64b fsrm md_clea
r serialize pconfig arch_lbr ibt flush_l1d arch_capabi
lities
Virtualization features:
Virtualization: VT-x
Caches (sum of all):
L1d: 320 KiB (8 instances)
L1i: 512 KiB (8 instances)
L2: 14 MiB (5 instances)
L3: 8 MiB (1 instance)
NUMA:
NUMA node(s): 1
NUMA node0 CPU(s): 0-7
Vulnerabilities:
Gather data sampling: Not affected
Itlb multihit: Not affected
L1tf: Not affected
Mds: Not affected
Meltdown: Not affected
Mmio stale data: Not affected
Reg file data sampling: Not affected
Retbleed: Not affected
Spec rstack overflow: Not affected
Spec store bypass: Mitigation; Speculative Store Bypass disabled via prct
l
Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointe
r sanitization
Spectre v2: Mitigation; Enhanced / Automatic IBRS; IBPB conditiona
l; RSB filling; PBRSB-eIBRS Not affected; BHI Not affe
cted
Srbds: Not affected
Tsx async abort: Not affected
https://github.com/sysprog21/kecho/blob/master/drop-tcp-socket.c
or
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