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net: sch: red: Change offloaded xstats to be incremental 

Change the value of the xstats requested from the driver for offloaded RED
to be incremental, like the normal stats.
It increases consistency - if a qdisc stops being offloaded its xstats
don't change.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Reviewed-by: Yuval Mintz <yuvalm@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nogah Frankel 2018-01-10 14:59:59 +01:00 committed by David S. Miller
parent f34b4aac46
commit f8253df553
2 changed files with 20 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
View File

@ -212,6 +212,7 @@ mlxsw_sp_qdisc_get_red_xstats(struct mlxsw_sp_port *mlxsw_sp_port, u32 handle,
{
struct red_stats *xstats_base = &mlxsw_sp_qdisc->xstats_base;
struct mlxsw_sp_port_xstats *xstats;
int early_drops, marks, pdrops;
if (mlxsw_sp_qdisc->handle != handle ||
mlxsw_sp_qdisc->type != MLXSW_SP_QDISC_RED)
@ -219,9 +220,17 @@ mlxsw_sp_qdisc_get_red_xstats(struct mlxsw_sp_port *mlxsw_sp_port, u32 handle,
xstats = &mlxsw_sp_port->periodic_hw_stats.xstats;
res->prob_drop = xstats->wred_drop[tclass_num] - xstats_base->prob_drop;
res->prob_mark = xstats->ecn - xstats_base->prob_mark;
res->pdrop = xstats->tail_drop[tclass_num] - xstats_base->pdrop;
early_drops = xstats->wred_drop[tclass_num] - xstats_base->prob_drop;
marks = xstats->ecn - xstats_base->prob_mark;
pdrops = xstats->tail_drop[tclass_num] - xstats_base->pdrop;
res->pdrop += pdrops;
res->prob_drop += early_drops;
res->prob_mark += marks;
xstats_base->pdrop += pdrops;
xstats_base->prob_drop += early_drops;
xstats_base->prob_mark += marks;
return 0;
}

24
net/sched/sch_red.c
View File

@ -344,32 +344,24 @@ static int red_dump_stats(struct Qdisc *sch, struct gnet_dump *d)
{
struct red_sched_data *q = qdisc_priv(sch);
struct net_device *dev = qdisc_dev(sch);
struct tc_red_xstats st = {
.early = q->stats.prob_drop + q->stats.forced_drop,
.pdrop = q->stats.pdrop,
.other = q->stats.other,
.marked = q->stats.prob_mark + q->stats.forced_mark,
};
struct tc_red_xstats st = {0};
if (sch->flags & TCQ_F_OFFLOADED) {
struct red_stats hw_stats = {0};
struct tc_red_qopt_offload hw_stats_request = {
.command = TC_RED_XSTATS,
.handle = sch->handle,
.parent = sch->parent,
{
.xstats = &hw_stats,
.xstats = &q->stats,
},
};
if (!dev->netdev_ops->ndo_setup_tc(dev,
TC_SETUP_QDISC_RED,
&hw_stats_request)) {
st.early += hw_stats.prob_drop + hw_stats.forced_drop;
st.pdrop += hw_stats.pdrop;
st.other += hw_stats.other;
st.marked += hw_stats.prob_mark + hw_stats.forced_mark;
}
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_RED,
&hw_stats_request);
}
st.early = q->stats.prob_drop + q->stats.forced_drop;
st.pdrop = q->stats.pdrop;
st.other = q->stats.other;
st.marked = q->stats.prob_mark + q->stats.forced_mark;
return gnet_stats_copy_app(d, &st, sizeof(st));
}