Tech-issues

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  1. 21 April 2011:High packet loss (ping) on:
SSID: ND-WiFi-Testbed

Ping Dest. : Server 

Ping fr. : pc03-pc10

23 packets transmitted, 13 received, 43% packet loss, time 22016ms
rtt min/avg/max/mdev = 108.488/154.857/221.417/38.580 ms

11 packets transmitted, 8 received, 27% packet loss, time 10008ms
rtt min/avg/max/mdev = 37.572/191.744/284.143/93.390 ms

    2. 25 May 2011: rx FIFO overrun (changes to the driver - compiled on pc02 - Experimental)

 +++ if_athvar.h

-#define        ATH_RXBUF       100              /* number of RX buffers */
+#define        ATH_RXBUF       200              /* number of RX buffers */

/* default number of beacon buffers */
-#define ATH_MAXVAPS_DEFAULT             4
+#define ATH_MAXVAPS_DEFAULT             8

3. 1 July 2011: pc02 ping works but no ssh/clush:

Jul  1 17:33:59 pc02 kernel: [ 8855.641813] CPU    0: hi:    0, btch:   1 usd:   0
Jul  1 17:33:59 pc02 kernel: [ 8855.658993] CPU    1: hi:    0, btch:   1 usd:   0
Jul  1 17:33:59 pc02 kernel: [ 8855.676177] Node 0 DMA32 per-cpu:
Jul  1 17:33:59 pc02 kernel: [ 8855.688946] CPU    0: hi:  186, btch:  31 usd:  46
Jul  1 17:33:59 pc02 kernel: [ 8855.706132] CPU    1: hi:  186, btch:  31 usd:   0
Jul  1 17:33:59 pc02 kernel: [ 8855.723315] active_anon:733 inactive_anon:1243 isolated_anon:65
Jul  1 17:33:59 pc02 kernel: [ 8855.723318]  active_file:1 inactive_file:132 isolated_file:0
Jul  1 17:33:59 pc02 kernel: [ 8855.723320]  unevictable:0 dirty:0 writeback:0 unstable:0
Jul  1 17:33:59 pc02 kernel: [ 8855.723322]  free:3227 slab_reclaimable:1424 slab_unreclaimable:236844
Jul  1 17:33:59 pc02 kernel: [ 8855.723324]  mapped:1 shmem:1312 pagetables:871 bounce:0
Jul  1 17:33:59 pc02 kernel: [ 8855.823803] Node 0 DMA free:3956kB min:60kB low:72kB high:88kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15364kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:12008kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jul  1 17:33:59 pc02 kernel: [ 8855.942236] lowmem_reserve[]: 0 984 984 984
Jul  1 17:33:59 pc02 kernel: [ 8855.957686] Node 0 DMA32 free:8952kB min:3980kB low:4972kB high:5968kB active_anon:2932kB inactive_anon:4972kB active_file:4kB inactive_file:528kB unevictable:0kB isolated(anon):260kB isolated(file):0kB present:1008508kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB shmem:5248kB slab_reclaimable:5696kB slab_unreclaimable:935368kB kernel_stack:944kB pagetables:3484kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:33 all_unreclaimable? no
Jul  1 17:33:59 pc02 kernel: [ 8856.084705] lowmem_reserve[]: 0 0 0 0
Jul  1 17:33:59 pc02 kernel: [ 8856.098585] Node 0 DMA: 1*4kB 0*8kB 1*16kB 1*32kB 1*64kB 2*128kB 2*256kB 2*512kB 0*1024kB 1*2048kB 0*4096kB = 3956kB
Jul  1 17:33:59 pc02 kernel: [ 8856.133219] Node 0 DMA32: 1730*4kB 188*8kB 13*16kB 0*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 8952kB
Jul  1 17:33:59 pc02 kernel: [ 8856.169935] 1456 total pagecache pages
Jul  1 17:33:59 pc02 kernel: [ 8856.183992] 17 pages in swap cache
Jul  1 17:33:59 pc02 kernel: [ 8856.196999] Swap cache stats: add 1159991, delete 1159974, find 69246/333288
Jul  1 17:33:59 pc02 kernel: [ 8856.220941] Free swap  = 1965528kB
Jul  1 17:33:59 pc02 kernel: [ 8856.233944] Total swap = 2031612kB
Jul  1 17:33:59 pc02 kernel: [ 8856.254725] 259717 pages RAM
Jul  1 17:33:59 pc02 kernel: [ 8856.266185] 6460 pages reserved
Jul  1 17:33:59 pc02 kernel: [ 8856.278415] 1496 pages shared
Jul  1 17:33:59 pc02 kernel: [ 8856.290124] 248440 pages non-shared
Jul  1 17:33:59 pc02 kernel: [ 8856.303393] Out of memory: kill process 3200 (sh) score 5074 or a child
Jul  1 17:33:59 pc02 kernel: [ 8856.326022] Killed process 3209 (bash) vsz:108260kB, anon-rss:0kB, file-rss:0kB
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