Dual-CPU Waits with high idle percentage

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Hello,

I'm troubleshooting some slow performance on a RHEL ES4 build.  Problem is "slow SSH logins".  None of the usual configuration culprits are at fault (kernel configs, name resolution, PAM modules, network config).  I started running vmstat and found that I was getting CPU waits at high idle times, on a dual-CPU system.  Anyway, here's the output of vmstat - let me know if anything strikes you as odd.

Thanks,
Mike.

bash-3.00# vmstat 5
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 0  0     32  68208 335840 6276452    0    0     1    41    3     1  1  0 99  0
 0  1     32  68208 335840 6276452    0    0     0    26 1095   346  0  0 100  0
 0  0     32  66440 335840 6276452    0    0     0    52 1080   491  0  0 98  1
 1  0     32  67640 335840 6276452    0    0     0   122 1123   854 10  1 88  1
 0  0     32  67664 335840 6276452    0    0     0   166 1078   497  5  0 95  0
 0  0     32  67736 335840 6276452    0    0     0    19 1093   331  0  0 99  1
 0  0     32  67744 335840 6276452    0    0     0     0 1066   334  7  0 93  0
 0  0     32  67728 335840 6276452    0    0     0    21 1096   383  1  0 98  1
 0  0     32  67728 335840 6276452    0    0     0    18 1066   309  0  0 100  0
 0  0     32  67744 335840 6276452    0    0     0    36 1098   353  0  0 100  1
 0  0     32  67760 335840 6276452    0    0     0     6 1070   341  0  0 99  0
 0  0     32  67760 335840 6276452    0    0     0    32 1106   344  0  0 100  0
 0  0     32  67728 335840 6276452    0    0     0    46 1074   332  0  0 100  0
 0  0     32  67728 335840 6276452    0    0     0     5 1094   344  0  0 99  0
 0  0     32  67712 335840 6276452    0    0     0    25 1082   378  0  0 99  0
 0  0     32  67352 335844 6276584    0    0     0    30 1126   445  1  0 99  0
 0  0     32  66584 335864 6277380    0    0    10   130 1117   403  2  0 97  1
 0  0     32  66608 335864 6277380    0    0     0   239 1119   533  1  0 98  1
 0  0     32  66344 335864 6277380    0    0     0   155 1081   369  8  0 91  1
 0  0     32  66216 335868 6277444    0    0     0    87 1101   337  1  0 99  0
 0  0     32  66160 335872 6277576    0    0     0     0 1069   314  0  0 100  0
 0  0     32  66224 335872 6277644    0    0     0    51 1092   490 37  1 61  0
 0  0     32  66088 335876 6277640    0    0     0    53 1069   322  0  0 99  1
 1  0     32  61464 335892 6279120    0    0     0    53 1148   439  3  0 96  1
 0  0     32  59864 335896 6280544    0    0     0   636 1103   342  0  0 98  1
 0  0     32  58888 335896 6280680    0    0     0    53 1160  1005 14  1 84  1
 0  0     32  58824 335896 6280748    0    0     0    48 1073   332  1  0 99  0
 0  0     32  58432 335896 6280748    0    0     0   186 1115   392  2  0 97  1
 0  1     32  58304 335900 6280948    0    0     0    98 1098   480  2  0 97  1
 0  0     32  55680 335900 6281016    0    0     0   226 1165   492  1  0 98  1
 0  0     32  55624 335900 6281016    0    0     0    54 1074   386  8  0 92  0
 0  1     32  56232 335900 6281016    0    0     0   148 1121   384  1  0 97  2
 0  0     32  57520 335900 6281016    0    0     0    66 1066   327  0  0 99  1
 0  0     32  58624 335900 6281016    0    0     0    18 1094   438  0  0 99  0
 0  0     32  58424 335904 6281148    0    0     0    36 1095   363  1  0 99  0
 0  0     32  58368 335912 6281276    0    0     0    78 1101   335  0  0 99  1
 0  0     32  73344 335664 6266496    0    0     0    30 1069   381 24  1 76  0
 0  0     32  74504 335664 6266496    0    0     0    53 1098   447 27  1 72  1
 0  0     32  74568 335664 6266496    0    0     0    71 1070   313  0  0 99  1
 1  0     32  73584 335664 6266496    0    0     0    86 1110   393  1  0 98  1
 0  0     32  73008 335664 6266496    0    0     0    47 1123   834 10  0 89  1
 0  0     32  72296 335664 6266496    0    0     0   246 1120   399  1  0 98  1
 0  0     32  72296 335664 6266496    0    0     0     5 1065   332  7  0 93  0
 0  0     32  72040 335664 6266496    0    0     0     3 1090   348  1  0 99  0
 0  0     32  72040 335664 6266496    0    0     0     3 1073   305  0  0 100  0


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