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Defines | |
| #define | MAXRATE 25000000.0 |
| #define | SAMLLFLOAT 0.0000001 |
Functions | |
| static double | p_to_b (double p, double rtt, double tzero, int psize, int bval) |
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Definition at line 1 of file formula.h. Referenced by p_to_b(). |
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Definition at line 2 of file formula.h. Referenced by p_to_b(). |
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Definition at line 8 of file formula.h. References MAXRATE, and SAMLLFLOAT. Referenced by b_to_p(), and TfrcAgent::recv(). 00009 { 00010 double tmp1, tmp2, res; 00011 00012 if (p < 0 || rtt < 0) { 00013 return MAXRATE ; 00014 } 00015 res=rtt*sqrt(2*bval*p/3); 00016 tmp1=3*sqrt(3*bval*p/8); 00017 if (tmp1>1.0) tmp1=1.0; 00018 tmp2=tzero*p*(1+32*p*p); 00019 res+=tmp1*tmp2; 00020 // if (formula_ == 1 && p > 0.25) { 00021 // // Get closer to RFC 3714, Table 1. 00022 // // This is for TCP-friendliness with a TCP flow without ECN 00023 // // and without timestamps. 00024 // // Just for experimental purposes. 00025 // if p > 0.70) { 00026 // res=res*18.0; 00027 // } else if p > 0.60) { 00028 // res=res*7.0; 00029 // } else if p > 0.50) { 00030 // res=res*5.0; 00031 // } else if p > 0.45) { 00032 // res=res*4.0; 00033 // } else if p > 0.40) { 00034 // res=res*3.0; 00035 // } else if p > 0.25) { 00036 // res=res*2.0; 00037 // } 00038 // } 00039 // At this point, 1/res gives the sending rate in pps: 00040 // 1/(rtt*sqrt(2*bval*p/3) + 3*sqrt(3*bval*p/8)*tzero*p*(1+32*p*p)) 00041 if (res < SAMLLFLOAT) { 00042 res=MAXRATE; 00043 } else { 00044 // change from 1/pps to Bps. 00045 res=psize/res; 00046 } 00047 if (res > MAXRATE) { 00048 res = MAXRATE ; 00049 } 00050 return res; 00051 }
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1.4.6