[Cake] cake flenter results round 2
Georgios Amanakis
gamanakis at gmail.com
Wed Nov 29 09:43:32 EST 2017
I am troubled by the number of data points flent reports for some pings and
uploads in this setup. A typical ack-filter result, similar to rrul2 I
posted before, looks like this:
Summary of rrul test run 'rrul_cakeeth_ds3_900mbit_45mbit_ack' (at
2017-11-29 14:37:5
5.719180):
avg median # data pts
Ping (ms) ICMP : 100.29 100.00 ms 337
Ping (ms) UDP BE : 297.62 100.20 ms 156
Ping (ms) UDP BK : 409.84 100.20 ms 109
Ping (ms) UDP EF : 414.94 100.20 ms 121
Ping (ms) avg : 374.13 100.05 ms 343
TCP download BE : 206.39 217.48 Mbits/s 301
TCP download BK : 163.05 163.81 Mbits/s 301
TCP download CS5 : 206.40 217.50 Mbits/s 301
TCP download EF : 203.18 215.23 Mbits/s 301
TCP download avg : 194.75 202.59 Mbits/s 301
TCP download sum : 779.02 810.36 Mbits/s 301
TCP totals : 781.55 810.66 Mbits/s 301
TCP upload BE : 1.86 24.68 Mbits/s 23
TCP upload BK : 0.15 1.72 Mbits/s 24
TCP upload CS5 : 0.25 2.26 Mbits/s 30
TCP upload EF : 0.27 2.15 Mbits/s 29
TCP upload avg : 0.63 7.59 Mbits/s 36
TCP upload sum : 2.53 30.38 Mbits/s 36
Shouldn't all "# data pts" be ~300?
George
On Wed, Nov 29, 2017 at 9:34 AM, Georgios Amanakis <gamanakis at gmail.com>
wrote:
> With ack-filter-aggressive I get results similar to rrul1 in ~10% of the
> runs, 90% are similar to rrul2.
> With ack-filter I haven't managed yet to get a rrul1 result, all of them
> are similar to rrul2.
> Will experiment more today.
>
> George
>
> On Tue, Nov 28, 2017 at 11:01 PM, Dave Taht <dave.taht at gmail.com> wrote:
>
>> the astounding figure is dropping ~70% of all packets, and tcp still
>> works at all.
>>
>> 682411 pkt (dropped 1511579 ...)
>>
>> is your 2nd result repeatable? What happens with just "ack-filter" not
>> aggressive?
>>
>> I keep thinking that a way to coax more performance out of 40GigE+
>> might be to drop more acks (as correctly as possible) before they even
>> hit the server.
>>
>>
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