From: Stephen Hemminger <stephen@networkplumber•org>
To: Eric Dumazet <eric.dumazet@gmail•com>
Cc: netdev <netdev@vger•kernel.org>,
Neal Cardwell <ncardwell@google•com>,
Soheil Hassas Yeganeh <soheil@google•com>
Subject: Re: [PATCH iproute2] tc: fq: support low_rate_threshold attribute
Date: Wed, 20 Sep 2017 17:53:05 -0700 [thread overview]
Message-ID: <20170920175305.105544f7@xeon-e3> (raw)
In-Reply-To: <1504905179.15310.101.camel@edumazet-glaptop3.roam.corp.google.com>
On Fri, 08 Sep 2017 14:12:59 -0700
Eric Dumazet <eric.dumazet@gmail•com> wrote:
> From: Eric Dumazet <edumazet@google•com>
>
> TCA_FQ_LOW_RATE_THRESHOLD sch_fq attribute was added in linux-4.9
>
> Tested:
>
> lpaa5:/tmp# tc -qd add dev eth1 root fq
> lpaa5:/tmp# tc -s qd sh dev eth1
> qdisc fq 8003: root refcnt 5 limit 10000p flow_limit 1000p buckets 4096 \
> orphan_mask 4095 bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 quantum 3648 \
> initial_quantum 18240 low_rate_threshold 550Kbit refill_delay 40.0ms
> Sent 62139 bytes 395 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
> 116 flows (114 inactive, 0 throttled)
> 1 gc, 0 highprio, 0 throttled
>
> lpaa5:/tmp# ./netperf -H lpaa6 -t TCP_RR -l10 -- -q 500000 -r 300,300 -o P99_LATENCY
> 99th Percentile Latency Microseconds
> 7081
>
> lpaa5:/tmp# tc qd replace dev eth1 root fq low_rate_threshold 10Mbit
> lpaa5:/tmp# ./netperf -H lpaa6 -t TCP_RR -l10 -- -q 500000 -r 300,300 -o P99_LATENCY
> 99th Percentile Latency Microseconds
> 858
>
>
> Signed-off-by: Eric Dumazet <edumazet@google•com>
Applied
prev parent reply other threads:[~2017-09-21 0:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-08 21:12 [PATCH iproute2] tc: fq: support low_rate_threshold attribute Eric Dumazet
2017-09-08 21:16 ` Soheil Hassas Yeganeh
2017-09-21 0:53 ` Stephen Hemminger [this message]
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