AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 04:10:51 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

selftests: mlxsw: Increase the tolerance of backlog buildup

Browse Source 
[ Upstream commit dda7f4fa55839baeb72ae040aeaf9ccf89d3e416 ]

The intention behind this test is to make sure that qdisc limit is
correctly projected to the HW. However, first, due to rounding in the
qdisc, and then in the driver, the number cannot actually be accurate. And
second, the approach to testing this is to oversubscribe the port with
traffic generated on the same switch. The actual backlog size therefore
fluctuates.

In practice, this test proved to be noisier than the rest, and spuriously
fails every now and then. Increase the tolerance to 10 % to avoid these
issues.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Petr Machata 2021-04-23 14:19:47 +02:00 committed by Greg Kroah-Hartman
parent 99d9989ee5
commit dfa0e8461e
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
tools/testing/selftests/drivers/net/mlxsw/sch_red_core.sh
View File

@ -507,8 +507,8 @@ do_red_test()
check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0." check_err $? "backlog $backlog / $limit Got $pct% marked packets, expected == 0."
local diff=$((limit - backlog)) local diff=$((limit - backlog))
pct=$((100 * diff / limit)) pct=$((100 * diff / limit))
((0 <= pct && pct <= 5)) ((0 <= pct && pct <= 10))
check_err $? "backlog $backlog / $limit expected <= 5% distance" check_err $? "backlog $backlog / $limit expected <= 10% distance"
log_test "TC $((vlan - 10)): RED backlog > limit" log_test "TC $((vlan - 10)): RED backlog > limit"
stop_traffic stop_traffic