Currently, htb rates are capped at ~34Gbps because they are internally expressed as 32-bit fields.
Move min and max rates to 64-bit fields and use TCA_HTB_RATE64 and TCA_HTB_CEIL64 to configure HTC classes to break this barrier. In order to test this, create a dummy tuntap device and set it's speed to a very high value so we can try adding a QoS queue with big rates. Reported-at: https://bugzilla.redhat.com/show_bug.cgi?id=2137619 Signed-off-by: Adrian Moreno <[email protected]> --- acinclude.m4 | 7 +++++ lib/netdev-linux.c | 61 +++++++++++++++++++++++++++++------------ tests/system-traffic.at | 31 +++++++++++++++++++++ 3 files changed, 81 insertions(+), 18 deletions(-) diff --git a/acinclude.m4 b/acinclude.m4 index ac1eab790..3bce2a652 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -211,6 +211,13 @@ AC_DEFUN([OVS_CHECK_LINUX_TC], [ ])], [AC_DEFINE([HAVE_TCA_STATS_PKT64], [1], [Define to 1 if TCA_STATS_PKT64 is available.])]) + + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([#include <linux/pkt_sched.h>], [ + int x = TCA_HTB_RATE64; + ])], + [AC_DEFINE([HAVE_TCA_HTB_RATE64], [1], + [Define to 1 if TCA_HTB_RATE64 is available.])]) ]) dnl OVS_CHECK_LINUX_SCTP_CT diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c index 60a0a8b2a..7311fd37b 100644 --- a/lib/netdev-linux.c +++ b/lib/netdev-linux.c @@ -484,9 +484,9 @@ static const struct tc_ops *const tcs[] = { NULL }; -static unsigned int tc_ticks_to_bytes(unsigned int rate, unsigned int ticks); -static unsigned int tc_bytes_to_ticks(unsigned int rate, unsigned int size); -static unsigned int tc_buffer_per_jiffy(unsigned int rate); +static unsigned int tc_ticks_to_bytes(uint64_t rate, unsigned int ticks); +static unsigned int tc_bytes_to_ticks(uint64_t rate, unsigned int size); +static unsigned int tc_buffer_per_jiffy(uint64_t rate); static uint32_t tc_time_to_ticks(uint32_t time); static struct tcmsg *netdev_linux_tc_make_request(const struct netdev *, @@ -516,7 +516,7 @@ tc_put_rtab(struct ofpbuf *msg, uint16_t type, const struct tc_ratespec *rate, uint64_t bps); static int tc_calc_cell_log(unsigned int mtu); static void tc_fill_rate(struct tc_ratespec *rate, uint64_t bps, int mtu); -static int tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes); +static int tc_calc_buffer(uint64_t Bps, int mtu, uint64_t burst_bytes); /* This is set pretty low because we probably won't learn anything from the @@ -4558,13 +4558,13 @@ static const struct tc_ops tc_ops_netem = { struct htb { struct tc tc; - unsigned int max_rate; /* In bytes/s. */ + uint64_t max_rate; /* In bytes/s. */ }; struct htb_class { struct tc_queue tc_queue; - unsigned int min_rate; /* In bytes/s. */ - unsigned int max_rate; /* In bytes/s. */ + uint64_t min_rate; /* In bytes/s. */ + uint64_t max_rate; /* In bytes/s. */ unsigned int burst; /* In bytes. */ unsigned int priority; /* Lower values are higher priorities. */ }; @@ -4652,8 +4652,8 @@ htb_setup_class__(struct netdev *netdev, unsigned int handle, if ((class->min_rate / HTB_RATE2QUANTUM) < mtu) { opt.quantum = mtu; } - opt.buffer = tc_calc_buffer(opt.rate.rate, mtu, class->burst); - opt.cbuffer = tc_calc_buffer(opt.ceil.rate, mtu, class->burst); + opt.buffer = tc_calc_buffer(class->min_rate, mtu, class->burst); + opt.cbuffer = tc_calc_buffer(class->max_rate, mtu, class->burst); opt.prio = class->priority; tcmsg = netdev_linux_tc_make_request(netdev, RTM_NEWTCLASS, NLM_F_CREATE, @@ -4666,15 +4666,28 @@ htb_setup_class__(struct netdev *netdev, unsigned int handle, nl_msg_put_string(&request, TCA_KIND, "htb"); opt_offset = nl_msg_start_nested(&request, TCA_OPTIONS); + +#ifdef HAVE_TCA_HTB_RATE64 + if (class->min_rate > UINT32_MAX) { + nl_msg_put_unspec(&request, TCA_HTB_RATE64, &class->min_rate , + sizeof(class->min_rate)); + } + if (class->max_rate > UINT32_MAX) { + nl_msg_put_unspec(&request, TCA_HTB_CEIL64, &class->max_rate , + sizeof(class->max_rate)); + } +#endif nl_msg_put_unspec(&request, TCA_HTB_PARMS, &opt, sizeof opt); - tc_put_rtab(&request, TCA_HTB_RTAB, &opt.rate, 0); - tc_put_rtab(&request, TCA_HTB_CTAB, &opt.ceil, 0); + + tc_put_rtab(&request, TCA_HTB_RTAB, &opt.rate, class->min_rate); + tc_put_rtab(&request, TCA_HTB_CTAB, &opt.ceil, class->max_rate); nl_msg_end_nested(&request, opt_offset); error = tc_transact(&request, NULL); if (error) { VLOG_WARN_RL(&rl, "failed to replace %s class %u:%u, parent %u:%u, " - "min_rate=%u max_rate=%u burst=%u prio=%u (%s)", + "min_rate=%"PRIu64" max_rate=%"PRIu64" burst=%u prio=%u " + "(%s)", netdev_get_name(netdev), tc_get_major(handle), tc_get_minor(handle), tc_get_major(parent), tc_get_minor(parent), @@ -4694,6 +4707,10 @@ htb_parse_tca_options__(struct nlattr *nl_options, struct htb_class *class) static const struct nl_policy tca_htb_policy[] = { [TCA_HTB_PARMS] = { .type = NL_A_UNSPEC, .optional = false, .min_len = sizeof(struct tc_htb_opt) }, +#ifdef HAVE_TCA_HTB_RATE64 + [TCA_HTB_RATE64] = { .type = NL_A_U64, .optional = true }, + [TCA_HTB_CEIL64] = { .type = NL_A_U64, .optional = true }, +#endif }; struct nlattr *attrs[ARRAY_SIZE(tca_htb_policy)]; @@ -4708,7 +4725,15 @@ htb_parse_tca_options__(struct nlattr *nl_options, struct htb_class *class) htb = nl_attr_get(attrs[TCA_HTB_PARMS]); class->min_rate = htb->rate.rate; class->max_rate = htb->ceil.rate; - class->burst = tc_ticks_to_bytes(htb->rate.rate, htb->buffer); +#ifdef HAVE_TCA_HTB_RATE64 + if (attrs[TCA_HTB_RATE64]) { + class->min_rate = *(uint64_t *) nl_attr_get(attrs[TCA_HTB_RATE64]); + } + if (attrs[TCA_HTB_CEIL64]) { + class->max_rate = *(uint64_t *) nl_attr_get(attrs[TCA_HTB_CEIL64]); + } +#endif + class->burst = tc_ticks_to_bytes(class->min_rate, htb->buffer); class->priority = htb->prio; return 0; } @@ -5969,7 +5994,7 @@ exit: /* Returns the number of bytes that can be transmitted in 'ticks' ticks at a * rate of 'rate' bytes per second. */ static unsigned int -tc_ticks_to_bytes(unsigned int rate, unsigned int ticks) +tc_ticks_to_bytes(uint64_t rate, unsigned int ticks) { read_psched(); return (rate * ticks) / ticks_per_s; @@ -5978,7 +6003,7 @@ tc_ticks_to_bytes(unsigned int rate, unsigned int ticks) /* Returns the number of ticks that it would take to transmit 'size' bytes at a * rate of 'rate' bytes per second. */ static unsigned int -tc_bytes_to_ticks(unsigned int rate, unsigned int size) +tc_bytes_to_ticks(uint64_t rate, unsigned int size) { read_psched(); return rate ? ((unsigned long long int) ticks_per_s * size) / rate : 0; @@ -5987,7 +6012,7 @@ tc_bytes_to_ticks(unsigned int rate, unsigned int size) /* Returns the number of bytes that need to be reserved for qdisc buffering at * a transmission rate of 'rate' bytes per second. */ static unsigned int -tc_buffer_per_jiffy(unsigned int rate) +tc_buffer_per_jiffy(uint64_t rate) { read_psched(); return rate / buffer_hz; @@ -6344,7 +6369,7 @@ tc_fill_rate(struct tc_ratespec *rate, uint64_t Bps, int mtu) /* rate->overhead = 0; */ /* New in 2.6.24, not yet in some */ /* rate->cell_align = 0; */ /* distro headers. */ rate->mpu = ETH_TOTAL_MIN; - rate->rate = Bps; + rate->rate = MIN(UINT32_MAX, Bps); } /* Appends to 'msg' an "rtab" table for the specified 'rate' as a Netlink @@ -6376,7 +6401,7 @@ tc_put_rtab(struct ofpbuf *msg, uint16_t type, const struct tc_ratespec *rate, * burst size of 'burst_bytes'. (If no value was requested, a 'burst_bytes' of * 0 is fine.) */ static int -tc_calc_buffer(unsigned int Bps, int mtu, uint64_t burst_bytes) +tc_calc_buffer(uint64_t Bps, int mtu, uint64_t burst_bytes) { unsigned int min_burst = tc_buffer_per_jiffy(Bps) + mtu; return tc_bytes_to_ticks(Bps, MAX(burst_bytes, min_burst)); diff --git a/tests/system-traffic.at b/tests/system-traffic.at index 4c378e1d0..eb2ca15aa 100644 --- a/tests/system-traffic.at +++ b/tests/system-traffic.at @@ -2354,6 +2354,37 @@ AT_CHECK([tc class show dev ovs-p1 | grep -q 'class htb .* HTB_CONF']) OVS_TRAFFIC_VSWITCHD_STOP AT_CLEANUP +AT_SETUP([QoS - 64bit]) +AT_SKIP_IF([test $HAVE_TC = no]) +OVS_TRAFFIC_VSWITCHD_START() + +ADD_NAMESPACES(at_ns0, at_ns1) +ADD_VETH(p0, at_ns0, br0, "10.1.1.1/24") +ADD_VETH(p1, at_ns1, br0, "10.1.1.2/24") + +dnl Adding a custom qdisc to ovs-p1, ovs-p0 will have the default qdisc. +AT_CHECK([tc qdisc add dev ovs-p1 root noqueue]) +AT_CHECK([tc qdisc show dev ovs-p1 | grep -q noqueue]) + +dnl Configure the QoS with rates that require 64bits, i.e: > 34Gbps. +AT_CHECK([ovs-vsctl set port ovs-p0 qos=@qos -- set port ovs-p1 qos=@qos dnl + -- --id=@qos create qos dnl + type=linux-htb other-config:max-rate=50000000000 queues:0=@queue dnl + -- --id=@queue create queue dnl + other_config:min-rate=40000000000 other_config:max-rate=50000000000 dnl + other_config:burst=50000000000], + [ignore], [ignore]) + +OVS_WAIT_UNTIL([tc qdisc show dev ovs-p0 | grep -q htb]) +OVS_WAIT_UNTIL([tc qdisc show dev ovs-p1 | grep -q htb]) + +m4_define([HTB_CONF], [rate 40Gbit ceil 50Gbit burst 1955030000b cburst 1955031250b]) +AT_CHECK([tc class show dev ovs-p0 | grep -q 'class htb .* HTB_CONF']) +AT_CHECK([tc class show dev ovs-p1 | grep -q 'class htb .* HTB_CONF']) + +OVS_TRAFFIC_VSWITCHD_STOP +AT_CLEANUP + AT_BANNER([conntrack]) AT_SETUP([conntrack - controller]) -- 2.39.2 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
