ModSelect.cc File Reference

#include "squid.h"
#include "anyp/PortCfg.h"
#include "comm/Connection.h"
#include "comm/Loops.h"
#include "fde.h"
#include "globals.h"
#include "ICP.h"
#include "mgr/Registration.h"
#include "SquidConfig.h"
#include "StatCounters.h"
#include "StatHist.h"
#include "Store.h"
#include <cerrno>

Include dependency graph for ModSelect.cc:

Go to the source code of this file.

Macros
#define	howmany(x, y)   (((x)+((y)-1))/(y))
#define	NBBY   8
#define	FD_MASK_BYTES   sizeof(fd_mask)
#define	FD_MASK_BITS   (FD_MASK_BYTES*NBBY)
#define	MAX_INCOMING_INTEGER   256
#define	INCOMING_FACTOR   5
#define	MAX_INCOMING_INTERVAL   (MAX_INCOMING_INTEGER << INCOMING_FACTOR)
#define	commCheckUdpIncoming   (++udp_io_events > (incoming_udp_interval>> INCOMING_FACTOR))
#define	commCheckDnsIncoming   (++dns_io_events > (incoming_dns_interval>> INCOMING_FACTOR))
#define	commCheckTcpIncoming   (++tcp_io_events > (incoming_tcp_interval>> INCOMING_FACTOR))

Functions
static int	examine_select (fd_set *, fd_set *)
static int	fdIsTcpListener (int fd)
static int	fdIsUdpListener (int fd)
static int	fdIsDns (int fd)
static int	comm_check_incoming_select_handlers (int nfds, int *fds)
static void	comm_select_dns_incoming (void)
static void	commUpdateReadBits (int fd, PF *handler)
static void	commUpdateWriteBits (int fd, PF *handler)
static void	comm_select_udp_incoming (void)
static void	comm_select_tcp_incoming (void)
static void	commIncomingStats (StoreEntry *sentry)

Variables
static int	MAX_POLL_TIME = 1000
static OBJH	commIncomingStats
static struct timeval	zero_tv
static fd_set	global_readfds
static fd_set	global_writefds
static int	nreadfds
static int	nwritefds
static int	udp_io_events = 0
static int	dns_io_events = 0
static int	tcp_io_events = 0
static int	incoming_udp_interval = 16 << INCOMING_FACTOR
static int	incoming_dns_interval = 16 << INCOMING_FACTOR
static int	incoming_tcp_interval = 16 << INCOMING_FACTOR

Macro Definition Documentation

commCheckDnsIncoming

#define commCheckDnsIncoming   (++dns_io_events > (incoming_dns_interval>> INCOMING_FACTOR))

Definition at line 118 of file ModSelect.cc.

commCheckTcpIncoming

#define commCheckTcpIncoming   (++tcp_io_events > (incoming_tcp_interval>> INCOMING_FACTOR))

Definition at line 119 of file ModSelect.cc.

commCheckUdpIncoming

#define commCheckUdpIncoming   (++udp_io_events > (incoming_udp_interval>> INCOMING_FACTOR))

Definition at line 117 of file ModSelect.cc.

FD_MASK_BITS

#define FD_MASK_BITS   (FD_MASK_BYTES*NBBY)

Definition at line 41 of file ModSelect.cc.

FD_MASK_BYTES

#define FD_MASK_BYTES   sizeof(fd_mask)

Definition at line 40 of file ModSelect.cc.

howmany

#define howmany	(		x,
			y
	)		(((x)+((y)-1))/(y))

Definition at line 35 of file ModSelect.cc.

INCOMING_FACTOR

#define INCOMING_FACTOR   5

Definition at line 109 of file ModSelect.cc.

MAX_INCOMING_INTEGER

#define MAX_INCOMING_INTEGER   256

Definition at line 108 of file ModSelect.cc.

MAX_INCOMING_INTERVAL

#define MAX_INCOMING_INTERVAL   (MAX_INCOMING_INTEGER << INCOMING_FACTOR)

Definition at line 110 of file ModSelect.cc.

NBBY

#define NBBY   8

Definition at line 38 of file ModSelect.cc.

Function Documentation

comm_check_incoming_select_handlers()

static int comm_check_incoming_select_handlers ( int  nfds, int *  fds  )

static

Definition at line 183 of file ModSelect.cc.

References commUpdateReadBits(), commUpdateWriteBits(), DBG_IMPORTANT, debugs, fd_table, getCurrentTime(), incoming_sockets_accepted, StatCounters::selects, statCounter, StatCounters::syscalls, and zero_tv.

Referenced by comm_select_dns_incoming(), comm_select_tcp_incoming(), and comm_select_udp_incoming().

comm_select_dns_incoming()

static void comm_select_dns_incoming ( void  )

static

Definition at line 577 of file ModSelect.cc.

References SquidConfig::average, comm_check_incoming_select_handlers(), StatCounters::comm_dns_incoming, SquidConfig::comm_incoming, Config, StatHist::count(), SquidConfig::dns, dns_io_events, DnsSocketA, DnsSocketB, incoming_dns_interval, INCOMING_DNS_MAX, MAX_INCOMING_INTERVAL, SquidConfig::min_poll, and statCounter.

comm_select_tcp_incoming()

static void comm_select_tcp_incoming ( void  )

static

Definition at line 288 of file ModSelect.cc.

References SquidConfig::average, comm_check_incoming_select_handlers(), SquidConfig::comm_incoming, StatCounters::comm_tcp_incoming, Config, StatHist::count(), HttpPortList, incoming_tcp_interval, INCOMING_TCP_MAX, Comm::IsConnOpen(), MAX_INCOMING_INTERVAL, MAXTCPLISTENPORTS, statCounter, SquidConfig::tcp, and tcp_io_events.

comm_select_udp_incoming()

static void comm_select_udp_incoming ( void  )

static

Definition at line 251 of file ModSelect.cc.

References SquidConfig::average, comm_check_incoming_select_handlers(), SquidConfig::comm_incoming, StatCounters::comm_udp_incoming, Config, StatHist::count(), Comm::Connection::fd, icpIncomingConn, icpOutgoingConn, incoming_udp_interval, INCOMING_UDP_MAX, Comm::IsConnOpen(), MAX_INCOMING_INTERVAL, statCounter, SquidConfig::udp, and udp_io_events.

commIncomingStats()

static void commIncomingStats ( StoreEntry *  sentry )

static

Definition at line 703 of file ModSelect.cc.

References StatCounters::comm_dns_incoming, StatCounters::comm_tcp_incoming, StatCounters::comm_udp_incoming, StatHist::dump(), incoming_dns_interval, INCOMING_FACTOR, incoming_tcp_interval, incoming_udp_interval, statCounter, statHistIntDumper, and storeAppendPrintf().

commUpdateReadBits()

void commUpdateReadBits ( int  fd, PF *  handler  )

static

Definition at line 722 of file ModSelect.cc.

References global_readfds, handler(), and nreadfds.

Referenced by comm_check_incoming_select_handlers().

commUpdateWriteBits()

void commUpdateWriteBits ( int  fd, PF *  handler  )

static

Definition at line 734 of file ModSelect.cc.

References global_writefds, handler(), and nwritefds.

Referenced by comm_check_incoming_select_handlers().

examine_select()

static int examine_select ( fd_set *  readfds, fd_set *  writefds  )

static

Definition at line 641 of file ModSelect.cc.

References commCallCloseHandlers(), DBG_CRITICAL, debugs, F(), fd_table, fdTypeStr, sb, ScheduleCallHere, StatCounters::selects, Squid_MaxFD, statCounter, StatCounters::syscalls, and xstrerr().

fdIsDns()

static int fdIsDns ( int  fd )

static

Definition at line 160 of file ModSelect.cc.

References DnsSocketA, and DnsSocketB.

fdIsTcpListener()

static int fdIsTcpListener ( int  fd )

static

Definition at line 172 of file ModSelect.cc.

References HttpPortList.

fdIsUdpListener()

static int fdIsUdpListener ( int  fd )

static

Definition at line 148 of file ModSelect.cc.

References Comm::Connection::fd, icpIncomingConn, and icpOutgoingConn.

Variable Documentation

commIncomingStats

OBJH commIncomingStats

static

Definition at line 48 of file ModSelect.cc.

dns_io_events

int dns_io_events = 0

static

Definition at line 112 of file ModSelect.cc.

Referenced by comm_select_dns_incoming().

global_readfds

fd_set global_readfds

static

Definition at line 55 of file ModSelect.cc.

Referenced by commUpdateReadBits().

global_writefds

fd_set global_writefds

static

Definition at line 56 of file ModSelect.cc.

Referenced by commUpdateWriteBits().

incoming_dns_interval

int incoming_dns_interval = 16 << INCOMING_FACTOR

static

Definition at line 115 of file ModSelect.cc.

Referenced by comm_select_dns_incoming(), and commIncomingStats().

incoming_tcp_interval

int incoming_tcp_interval = 16 << INCOMING_FACTOR

static

Definition at line 116 of file ModSelect.cc.

Referenced by comm_select_tcp_incoming(), and commIncomingStats().

incoming_udp_interval

int incoming_udp_interval = 16 << INCOMING_FACTOR

static

Definition at line 114 of file ModSelect.cc.

Referenced by comm_select_udp_incoming(), and commIncomingStats().

MAX_POLL_TIME

int MAX_POLL_TIME = 1000

static

Definition at line 32 of file ModSelect.cc.

nreadfds

int nreadfds

static

Definition at line 57 of file ModSelect.cc.

Referenced by commUpdateReadBits().

nwritefds

int nwritefds

static

Definition at line 58 of file ModSelect.cc.

Referenced by commUpdateWriteBits().

tcp_io_events

int tcp_io_events = 0

static

Definition at line 113 of file ModSelect.cc.

Referenced by comm_select_tcp_incoming().

udp_io_events

int udp_io_events = 0

static

Definition at line 111 of file ModSelect.cc.

Referenced by comm_select_udp_incoming().

zero_tv

struct timeval zero_tv

static

Definition at line 54 of file ModSelect.cc.

Referenced by comm_check_incoming_select_handlers().