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e9f0fb8849
The aggresive load balancing causes packet re-ordering as active
flows are moved from a slave to another within the group. Sometime
this aggresive lb is not necessary if the preference is for less
re-ordering. This parameter if used with value "0" disables
this dynamic flow shuffling minimizing packet re-ordering. Of course
the side effect is that it has to live with the static load balancing
that the hashing distribution provides. This impact is less severe if
the correct xmit-hashing-policy is used for the tlb setup.
The default value of the parameter is set to "1" mimicing the earlier
behavior.
Ran the netperf test with 200 stream for 1 min between two hosts with
4x1G trunk (xmit-lb mode with xmit-policy L3+4) before and after these
changes. Following was the command used for those 200 instances -
netperf -t TCP_RR -l 60 -s 5 -H <host> -- -r81920,81920
Transactions per second:
Before change: 1,367.11
After change: 1,470.65
Change-Id: Ie3f75c77282cf602e83a6e833c6eb164e72a0990
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/*
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* drivers/net/bond/bond_options.h - bonding options
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* Copyright (c) 2013 Nikolay Aleksandrov <nikolay@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _BOND_OPTIONS_H
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#define _BOND_OPTIONS_H
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#define BOND_OPT_MAX_NAMELEN 32
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#define BOND_OPT_VALID(opt) ((opt) < BOND_OPT_LAST)
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#define BOND_MODE_ALL_EX(x) (~(x))
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/* Option flags:
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* BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting
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* BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting
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* BOND_OPTFLAG_RAWVAL - the option parses the value itself
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*/
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enum {
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BOND_OPTFLAG_NOSLAVES = BIT(0),
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BOND_OPTFLAG_IFDOWN = BIT(1),
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BOND_OPTFLAG_RAWVAL = BIT(2)
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};
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/* Value type flags:
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* BOND_VALFLAG_DEFAULT - mark the value as default
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* BOND_VALFLAG_(MIN|MAX) - mark the value as min/max
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*/
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enum {
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BOND_VALFLAG_DEFAULT = BIT(0),
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BOND_VALFLAG_MIN = BIT(1),
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BOND_VALFLAG_MAX = BIT(2)
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};
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/* Option IDs, their bit positions correspond to their IDs */
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enum {
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BOND_OPT_MODE,
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BOND_OPT_PACKETS_PER_SLAVE,
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BOND_OPT_XMIT_HASH,
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BOND_OPT_ARP_VALIDATE,
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BOND_OPT_ARP_ALL_TARGETS,
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BOND_OPT_FAIL_OVER_MAC,
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BOND_OPT_ARP_INTERVAL,
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BOND_OPT_ARP_TARGETS,
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BOND_OPT_DOWNDELAY,
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BOND_OPT_UPDELAY,
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BOND_OPT_LACP_RATE,
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BOND_OPT_MINLINKS,
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BOND_OPT_AD_SELECT,
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BOND_OPT_NUM_PEER_NOTIF,
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BOND_OPT_MIIMON,
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BOND_OPT_PRIMARY,
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BOND_OPT_PRIMARY_RESELECT,
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BOND_OPT_USE_CARRIER,
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BOND_OPT_ACTIVE_SLAVE,
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BOND_OPT_QUEUE_ID,
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BOND_OPT_ALL_SLAVES_ACTIVE,
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BOND_OPT_RESEND_IGMP,
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BOND_OPT_LP_INTERVAL,
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BOND_OPT_SLAVES,
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BOND_OPT_TLB_DYNAMIC_LB,
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BOND_OPT_LAST
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};
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/* This structure is used for storing option values and for passing option
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* values when changing an option. The logic when used as an arg is as follows:
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* - if string != NULL -> parse it, if the opt is RAW type then return it, else
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* return the parse result
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* - if string == NULL -> parse value
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*/
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struct bond_opt_value {
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char *string;
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u64 value;
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u32 flags;
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};
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struct bonding;
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struct bond_option {
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int id;
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const char *name;
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const char *desc;
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u32 flags;
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/* unsuppmodes is used to denote modes in which the option isn't
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* supported.
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*/
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unsigned long unsuppmodes;
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/* supported values which this option can have, can be a subset of
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* BOND_OPTVAL_RANGE's value range
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*/
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const struct bond_opt_value *values;
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int (*set)(struct bonding *bond, const struct bond_opt_value *val);
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};
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int __bond_opt_set(struct bonding *bond, unsigned int option,
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struct bond_opt_value *val);
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int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf);
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const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
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struct bond_opt_value *val);
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const struct bond_option *bond_opt_get(unsigned int option);
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const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val);
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/* This helper is used to initialize a bond_opt_value structure for parameter
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* passing. There should be either a valid string or value, but not both.
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* When value is ULLONG_MAX then string will be used.
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*/
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static inline void __bond_opt_init(struct bond_opt_value *optval,
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char *string, u64 value)
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{
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memset(optval, 0, sizeof(*optval));
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optval->value = ULLONG_MAX;
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if (value == ULLONG_MAX)
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optval->string = string;
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else
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optval->value = value;
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}
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#define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value)
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#define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX)
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void bond_option_arp_ip_targets_clear(struct bonding *bond);
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#endif /* _BOND_OPTIONS_H */
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