FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-13 11:51:32 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

sch_htb: Stats for offloaded HTB

Browse Source 
This commit adds support for statistics of offloaded HTB. Bytes and
packets counters for leaf and inner nodes are supported, the values are
taken from per-queue qdiscs, and the numbers that the user sees should
have the same behavior as the software (non-offloaded) HTB.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Maxim Mikityanskiy 2021-01-19 14:08:14 +02:00 committed by Jakub Kicinski
parent d03b195b5a
commit 8327158624
1 changed files with 53 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
net/sched/sch_htb.c
View File

@ -114,6 +114,7 @@ struct htb_class {
* Written often fields
*/
struct gnet_stats_basic_packed bstats;
struct gnet_stats_basic_packed bstats_bias;
struct tc_htb_xstats xstats; /* our special stats */
/* token bucket parameters */
@ -1220,6 +1221,7 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
struct sk_buff *skb, struct tcmsg *tcm)
{
struct htb_class *cl = (struct htb_class *)arg;
struct htb_sched *q = qdisc_priv(sch);
struct nlattr *nest;
struct tc_htb_opt opt;
@ -1246,6 +1248,8 @@ static int htb_dump_class(struct Qdisc *sch, unsigned long arg,
opt.level = cl->level;
if (nla_put(skb, TCA_HTB_PARMS, sizeof(opt), &opt))
goto nla_put_failure;
if (q->offload && nla_put_flag(skb, TCA_HTB_OFFLOAD))
goto nla_put_failure;
if ((cl->rate.rate_bytes_ps >= (1ULL << 32)) &&
nla_put_u64_64bit(skb, TCA_HTB_RATE64, cl->rate.rate_bytes_ps,
TCA_HTB_PAD))
@ -1262,10 +1266,39 @@ nla_put_failure:
return -1;
}
static void htb_offload_aggregate_stats(struct htb_sched *q,
struct htb_class *cl)
{
struct htb_class *c;
unsigned int i;
memset(&cl->bstats, 0, sizeof(cl->bstats));
for (i = 0; i < q->clhash.hashsize; i++) {
hlist_for_each_entry(c, &q->clhash.hash[i], common.hnode) {
struct htb_class *p = c;
while (p && p->level < cl->level)
p = p->parent;
if (p != cl)
continue;
cl->bstats.bytes += c->bstats_bias.bytes;
cl->bstats.packets += c->bstats_bias.packets;
if (c->level == 0) {
cl->bstats.bytes += c->leaf.q->bstats.bytes;
cl->bstats.packets += c->leaf.q->bstats.packets;
}
}
}
}
static int
htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d)
{
struct htb_class *cl = (struct htb_class *)arg;
struct htb_sched *q = qdisc_priv(sch);
struct gnet_stats_queue qs = {
.drops = cl->drops,
.overlimits = cl->overlimits,
@ -1280,6 +1313,19 @@ htb_dump_class_stats(struct Qdisc *sch, unsigned long arg, struct gnet_dump *d)
cl->xstats.ctokens = clamp_t(s64, PSCHED_NS2TICKS(cl->ctokens),
INT_MIN, INT_MAX);
if (q->offload) {
if (!cl->level) {
if (cl->leaf.q)
cl->bstats = cl->leaf.q->bstats;
else
memset(&cl->bstats, 0, sizeof(cl->bstats));
cl->bstats.bytes += cl->bstats_bias.bytes;
cl->bstats.packets += cl->bstats_bias.packets;
} else {
htb_offload_aggregate_stats(q, cl);
}
}
if (gnet_stats_copy_basic(qdisc_root_sleeping_running(sch),
d, NULL, &cl->bstats) < 0 ||
gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 ||
@ -1464,6 +1510,11 @@ static int htb_destroy_class_offload(struct Qdisc *sch, struct htb_class *cl,
WARN_ON(old != q);
}
if (cl->parent) {
cl->parent->bstats_bias.bytes += q->bstats.bytes;
cl->parent->bstats_bias.packets += q->bstats.packets;
}
offload_opt = (struct tc_htb_qopt_offload) {
.command = !last_child ? TC_HTB_LEAF_DEL :
destroying ? TC_HTB_LEAF_DEL_LAST_FORCE :
@ -1803,6 +1854,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
htb_graft_helper(dev_queue, old_q);
goto err_kill_estimator;
}
parent->bstats_bias.bytes += old_q->bstats.bytes;
parent->bstats_bias.packets += old_q->bstats.packets;
qdisc_put(old_q);
}
new_q = qdisc_create_dflt(dev_queue, &pfifo_qdisc_ops,