Latência wi-fi instável

Question

Estou tendo problemas estranhos de latência com minha conexão de rede.

Aqui estão os resultados do ping do servidor do Google, o mesmo vale para qualquer servidor remoto que permita ping.

C:\Users>ping -t -l 1000 8.8.8.8

Pinging 8.8.8.8 with 1000 bytes of data:
Reply from 8.8.8.8: bytes=1000 time=97ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=118ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=137ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=45ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=43ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=35ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=96ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=105ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=117ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=135ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=43ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=64ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=74ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=93ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=102ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=115ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=144ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=47ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=69ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=71ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=74ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=102ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=116ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=40ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=42ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=61ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=71ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=81ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=101ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=111ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=131ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=39ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=50ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=70ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=81ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=202ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=109ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=129ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=139ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=57ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=32ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=93ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=105ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=124ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=134ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=52ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=61ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=81ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=92ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=103ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=125ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=134ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=51ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=60ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=75ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=97ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=109ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=136ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=144ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=47ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=58ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=72ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=70ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=100ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=121ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=128ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=38ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=58ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=69ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=89ms TTL=54
Reply from 8.8.8.8: bytes=1000 time=97ms TTL=54

Ping statistics for 8.8.8.8:
    Packets: Sent = 71, Received = 71, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 32ms, Maximum = 202ms, Average = 88ms
Control-C

Eu também notei o padrão crescente que de repente cai para ~ 35ms & repete-se regularmente.

Meu laptop é Acer V 17 com adaptador sem fio Qualcomm Atheros QCA61x4. Tentei atualizar o driver para a versão 12.0.0.230 sem diferença.

Se eu usar o PC com fio, a latência média para 8.8.8.8 é de 25 ms com desvio mínimo. Mesmo com o meu telefone Android usando a mesma rede sem fio, a latência varia de 25 a 35 ms. Eu até tentei outro laptop na outra sala muito mais longe do roteador e ele tem 25ms estáveis com pacotes perdidos ocasionais devido à distância provável.

Quando faço ping no gateway local a partir do laptop usando a rede sem fio, parece bastante normal:

C:\Users\David>ping -t -l 1000 10.0.0.138

Pinging 10.0.0.138 with 1000 bytes of data:
Reply from 10.0.0.138: bytes=1000 time=3ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=4ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=3ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=4ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=14ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=11ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=9ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=5ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=8ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=3ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=8ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=8ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=5ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=71ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=11ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=4ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=8ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=5ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=9ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=8ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=7ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=15ms TTL=255
Reply from 10.0.0.138: bytes=1000 time=6ms TTL=255

Ping statistics for 10.0.0.138:
    Packets: Sent = 97, Received = 97, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 3ms, Maximum = 71ms, Average = 7ms
Control-C

Meu roteador wi-fi é o Zyxel vmg1312 do ISP, mas como eu disse, o problema é exclusivo do meu laptop até agora. Estou usando o Windows 10 build 10586 no PC & laptop.

Editar: Tentei conectar usando fio - sem problemas. Pouco depois de conectar-se novamente ao wi-fi, funcionou bem por um tempo, depois começou a oscilar novamente.

experimentou esta solução , novamente funciona para alguns pings e depois volta:

C:\Users\David>ping -t 8.8.8.8

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=24ms TTL=54
Reply from 8.8.8.8: bytes=32 time=22ms TTL=54
Reply from 8.8.8.8: bytes=32 time=22ms TTL=54
Reply from 8.8.8.8: bytes=32 time=22ms TTL=54
Reply from 8.8.8.8: bytes=32 time=21ms TTL=54
Reply from 8.8.8.8: bytes=32 time=95ms TTL=54
Reply from 8.8.8.8: bytes=32 time=49ms TTL=54
Reply from 8.8.8.8: bytes=32 time=62ms TTL=54
Reply from 8.8.8.8: bytes=32 time=66ms TTL=54
Reply from 8.8.8.8: bytes=32 time=81ms TTL=54
Reply from 8.8.8.8: bytes=32 time=37ms TTL=54
Reply from 8.8.8.8: bytes=32 time=105ms TTL=54
Reply from 8.8.8.8: bytes=32 time=114ms TTL=54
Reply from 8.8.8.8: bytes=32 time=123ms TTL=54
Reply from 8.8.8.8: bytes=32 time=51ms TTL=54
Reply from 8.8.8.8: bytes=32 time=37ms TTL=54
Reply from 8.8.8.8: bytes=32 time=46ms TTL=54
Reply from 8.8.8.8: bytes=32 time=54ms TTL=54
Reply from 8.8.8.8: bytes=32 time=51ms TTL=54
Reply from 8.8.8.8: bytes=32 time=71ms TTL=54
Reply from 8.8.8.8: bytes=32 time=90ms TTL=54
Reply from 8.8.8.8: bytes=32 time=102ms TTL=54
Reply from 8.8.8.8: bytes=32 time=108ms TTL=54
Reply from 8.8.8.8: bytes=32 time=117ms TTL=54
Reply from 8.8.8.8: bytes=32 time=128ms TTL=54
Reply from 8.8.8.8: bytes=32 time=34ms TTL=54
Reply from 8.8.8.8: bytes=32 time=43ms TTL=54
Reply from 8.8.8.8: bytes=32 time=53ms TTL=54
Reply from 8.8.8.8: bytes=32 time=63ms TTL=54
Reply from 8.8.8.8: bytes=32 time=81ms TTL=54
Reply from 8.8.8.8: bytes=32 time=44ms TTL=54
Reply from 8.8.8.8: bytes=32 time=41ms TTL=54

Ping statistics for 8.8.8.8:
    Packets: Sent = 32, Received = 32, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 21ms, Maximum = 128ms, Average = 64ms
Control-C

Exatamente a mesma coisa acontece quando eu reconfixo WlanSvc service usando o gerenciador de tarefas. Funciona por um tempo e depois volta.

    

Answer 1

Problema resolvido, foi uma configuração de gerenciamento de energia. Qualquer um que tenha os mesmos problemas, tente ir para Control Panel -> Power managment -> schema settings (for the one selected) -> Advanced settings -> Wireless adapter e alterá-lo para o desempenho máximo.

Eu tenho janelas localizadas para que o caminho não seja exatamente igual.