Re: [lwip-users] TCP Sessions Scale Limit

[Jan Menzel]

The error is cased by a failed call to memp_malloc(MEMP_TCP_SEG). So
you're running out of "simultaneously queued TCP segments". Try
increasing MEMP_NUM_TCP_SEG. Default is 16. Also check the statistics
more closely. After the protocol related block use pasted the TCP part
from a memory and memory pool related block follows which contains
numbers about "TCP_SEG". There you probably have errors as well.

        Jan

On 27.02.2018 15:09, Anil kumar wrote:
> I have 128 gig RAM , I feel i have been restricted by some macro.
> 
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> tcp_create_segment:192 tcp_create_segment: no memory.
> tcp_write:779 tcp_write: 0 (with mem err)
> 
> 
> address@hidden:~$ cat /proc/meminfo 
> MemTotal:       132024188 kB
> MemFree:        101949284 kB
> MemAvailable:   119384708 kB
> Buffers:         1616608 kB
> Cached:         15111964 kB
> SwapCached:            0 kB
> Active:         11114268 kB
> Inactive:        8722364 kB
> Active(anon):    3108632 kB
> Inactive(anon):     1368 kB
> Active(file):    8005636 kB
> Inactive(file):  8720996 kB
> Unevictable:           0 kB
> Mlocked:               0 kB
> SwapTotal:      134205436 kB
> SwapFree:       134205436 kB
> Dirty:               548 kB
> Writeback:             0 kB
> AnonPages:       3108060 kB
> Mapped:          2152924 kB
> Shmem:              1936 kB
> Slab:            1435644 kB
> SReclaimable:    1329316 kB
> SUnreclaim:       106328 kB
> KernelStack:       10192 kB
> PageTables:        31252 kB
> NFS_Unstable:          0 kB
> Bounce:                0 kB
> WritebackTmp:          0 kB
> CommitLimit:    196023224 kB
> Committed_AS:   34203972 kB
> VmallocTotal:   34359738367 kB
> VmallocUsed:           0 kB
> VmallocChunk:          0 kB
> HardwareCorrupted:     0 kB
> AnonHugePages:   2727936 kB
> CmaTotal:              0 kB
> CmaFree:               0 kB
> HugePages_Total:    4096
> HugePages_Free:     4032
> HugePages_Rsvd:        0
> HugePages_Surp:        0
> Hugepagesize:       2048 kB
> DirectMap4k:      272572 kB
> DirectMap2M:    18591744 kB
> DirectMap1G:    115343360 kB
> address@hidden:~$ 
> 
> 
> On 27 February 2018 at 19:29, Jan Menzel <address@hidden
> <mailto:address@hidden>> wrote:
> 
>     On 27.02.2018 14:54, Anil kumar wrote:
>     [...]
>     >         memerr: 20829
>     [...]
> 
>     You have memory (RAM) problems.
> 
>             Jan
> 
>     _______________________________________________
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> 
> 
> 
> 
> -- 
> With Regards
> Anil Kumar S N
> 
> 
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