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Remove tcp_input lock statistics; these are intended for debugging only

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and are not intended to ship in 8.0 as they dirty additional cache
lines in a performance-critical per-packet path.

MFC after:	3 days
This commit is contained in:
Robert Watson 2009-10-06 20:35:41 +00:00
parent e05b498065
commit f681a5fdd4
1 changed files with 2 additions and 32 deletions
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34
sys/netinet/tcp_input.c
View file

@ -180,26 +180,6 @@ int tcp_read_locking = 1;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, read_locking, CTLFLAG_RW,
&tcp_read_locking, 0, "Enable read locking strategy");
int tcp_rlock_atfirst;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, rlock_atfirst, CTLFLAG_RD,
&tcp_rlock_atfirst, 0, "");
int tcp_wlock_atfirst;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, tcp_wlock_atfirst, CTLFLAG_RD,
&tcp_wlock_atfirst, 0, "");
int tcp_wlock_upgraded;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, wlock_upgraded, CTLFLAG_RD,
&tcp_wlock_upgraded, 0, "");
int tcp_wlock_relocked;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, wlock_relocked, CTLFLAG_RD,
&tcp_wlock_relocked, 0, "");
int tcp_wlock_looped;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, wlock_looped, CTLFLAG_RD,
&tcp_wlock_looped, 0, "");
VNET_DEFINE(struct inpcbhead, tcb);
VNET_DEFINE(struct inpcbinfo, tcbinfo);
#define tcb6 tcb /* for KAME src sync over BSD*'s */
@ -505,11 +485,9 @@ tcp_input(struct mbuf *m, int off0)
tcp_read_locking == 0) {
INP_INFO_WLOCK(&V_tcbinfo);
ti_locked = TI_WLOCKED;
tcp_wlock_atfirst++;
} else {
INP_INFO_RLOCK(&V_tcbinfo);
ti_locked = TI_RLOCKED;
tcp_rlock_atfirst++;
}
findpcb:
@ -662,15 +640,11 @@ relocked:
ti_locked = TI_WLOCKED;
INP_WLOCK(inp);
if (in_pcbrele(inp)) {
tcp_wlock_looped++;
inp = NULL;
goto findpcb;
}
tcp_wlock_relocked++;
} else {
} else
ti_locked = TI_WLOCKED;
tcp_wlock_upgraded++;
}
}
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
@ -717,16 +691,12 @@ relocked:
ti_locked = TI_WLOCKED;
INP_WLOCK(inp);
if (in_pcbrele(inp)) {
tcp_wlock_looped++;
inp = NULL;
goto findpcb;
}
tcp_wlock_relocked++;
goto relocked;
} else {
} else
ti_locked = TI_WLOCKED;
tcp_wlock_upgraded++;
}
}
INP_INFO_WLOCK_ASSERT(&V_tcbinfo);
}