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[TCP] H-TCP: Use msecs_to_jiffies

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Use functions to calculate jiffies from milliseconds and not the old,
crude method of dividing HZ by a value. Ensures more accurate values
even in the face of strange HZ values.

Signed-off-By: Baruch Even <baruch@ev-en.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Baruch Even 2006-03-20 22:22:20 -08:00 committed by David S. Miller
parent b191ba0d59
commit c33ad6e476
1 changed files with 2 additions and 2 deletions
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4
net/ipv4/tcp_htcp.c
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@ -80,7 +80,7 @@ static inline void measure_rtt(struct sock *sk)
if (icsk->icsk_ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) { if (icsk->icsk_ca_state == TCP_CA_Open && tp->snd_ssthresh < 0xFFFF && ca->ccount > 3) {
if (ca->maxRTT < ca->minRTT) if (ca->maxRTT < ca->minRTT)
ca->maxRTT = ca->minRTT; ca->maxRTT = ca->minRTT;
if (ca->maxRTT < srtt && srtt <= ca->maxRTT+HZ/50) if (ca->maxRTT < srtt && srtt <= ca->maxRTT+msecs_to_jiffies(20))
ca->maxRTT = srtt; ca->maxRTT = srtt;
} }
} }
@ -135,7 +135,7 @@ static inline void htcp_beta_update(struct htcp *ca, u32 minRTT, u32 maxRTT)
} }
} }
if (ca->modeswitch && minRTT > max(HZ/100, 1) && maxRTT) { if (ca->modeswitch && minRTT > msecs_to_jiffies(10) && maxRTT) {
ca->beta = (minRTT<<7)/maxRTT; ca->beta = (minRTT<<7)/maxRTT;
if (ca->beta < BETA_MIN) if (ca->beta < BETA_MIN)
ca->beta = BETA_MIN; ca->beta = BETA_MIN;