Hi all; In according to my investigation on the ats read performance,NetHandler::mainNetEvent is the top function. On my system lots of buffer over run is exist. In my system net input interface has 250 Mbps traffic but on the client output only 125 Mbps is exist. Half of the downloaded content is returning to client.
Does anyone knows the reason of this case? And how can I fixe it? This is the "perf top" output: 4.82% libpcre.so.3.13.1 [.] match 3.27% [kernel] [k] native_write_msr_safe 2.09% [kernel] [k] ipt_do_table 1.60% [kernel] [k] __schedule 1.57% [kernel] [k] menu_select 1.43% libc-2.13.so [.] 0x00000000000e92b0 1.35% [kernel] [k] find_busiest_group 1.16% traffic_server [.] EThread::execute() 1.12% [kernel] [k] copy_user_generic_string 1.10% [kernel] [k] nf_iterate 1.04% [kernel] [k] _raw_spin_lock_irqsave 1.03% [kernel] [k] int_sqrt *1.02% traffic_server [.] NetHandler::mainNetEvent(int, Event*)* 0.96% [bnx2x] [k] bnx2x_rx_int 0.93% [kernel] [k] _raw_spin_lock 0.90% [kernel] [k] htable_selective_cleanup 0.86% [kernel] [k] cpuidle_enter_state 0.83% [kernel] [k] enqueue_task_fair 0.83% [kernel] [k] tcp_packet 0.76% [kernel] [k] apic_timer_interrupt 0.76% [kernel] [k] timerqueue_add 0.76% [kernel] [k] idle_cpu 0.71% [bnx2x] [k] bnx2x_start_xmit 0.67% [kernel] [k] rb_erase *0.64% traffic_server [.] read_from_net(NetHandler*, UnixNetVConnection*, EThread*) * On Thu, Oct 23, 2014 at 12:33 PM, Ergin Ozekes <ergin.oze...@gmail.com> wrote: > Hi all; > > My current working network bandwidth is 350 Mbps. > My netstat -st output prints out below value increasingly. > > 1555903887 packets collapsed in receive queue due to low socket buffer > 1555908175 packets collapsed in receive queue due to low socket buffer > 1555912925 packets collapsed in receive queue due to low socket buffer > 1555920054 packets collapsed in receive queue due to low socket buffer > 1555929162 packets collapsed in receive queue due to low socket buffer > 1555938162 packets collapsed in receive queue due to low socket buffer > 1555945682 packets collapsed in receive queue due to low socket buffer > 1555951783 packets collapsed in receive queue due to low socket buffer > 1555959318 packets collapsed in receive queue due to low socket buffer > 1555962474 packets collapsed in receive queue due to low socket buffer > 1555969574 packets collapsed in receive queue due to low socket buffer > > I've increased to socket buffer size, backlog queue size and memlock value > was set to unlimited for ats user. How can I fix it completely? > BTW, How can I increase read from socket(connection) performance of the > ATS? > > > Best Regards, > Ergin Ozekes > > On Thu, Oct 23, 2014 at 12:16 PM, Ergin Ozekes <ergin.oze...@gmail.com> > wrote: > >> Hi all; >> >> My current working network bandwidth is 350 Mbps. >> My netstat -st output prints out below value increasingly. >> >> 1555903887 packets collapsed in receive queue due to low socket buffer >> 1555908175 packets collapsed in receive queue due to low socket buffer >> 1555912925 packets collapsed in receive queue due to low socket buffer >> 1555920054 packets collapsed in receive queue due to low socket buffer >> 1555929162 packets collapsed in receive queue due to low socket buffer >> 1555938162 packets collapsed in receive queue due to low socket buffer >> 1555945682 packets collapsed in receive queue due to low socket buffer >> 1555951783 packets collapsed in receive queue due to low socket buffer >> 1555959318 packets collapsed in receive queue due to low socket buffer >> 1555962474 packets collapsed in receive queue due to low socket buffer >> 1555969574 packets collapsed in receive queue due to low socket buffer >> >> I've increased to socket buffer size, backlog queue size and memlock >> value was set to unlimited for ats user. How can I fix it completely? >> >> Best Regards, >> Ergin Ozekes >> > >
