DPDK patches and discussions
 help / color / mirror / Atom feed
From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: Ferruh Yigit <ferruh.yigit@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>,
	"alialnu@mellanox.com" <alialnu@mellanox.com>,
	"orgerlitz@mellanox.com" <orgerlitz@mellanox.com>,
	"wenzhuo.lu@intel.com" <wenzhuo.lu@intel.com>,
	"beilei.xing@intel.com" <beilei.xing@intel.com>,
	"bernard.iremonger@intel.com" <bernard.iremonger@intel.com>
Cc: "hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	"viacheslavo@mellanox.com" <viacheslavo@mellanox.com>,
	"thomas@monjalon.net" <thomas@monjalon.net>,
	Ruifeng Wang <Ruifeng.Wang@arm.com>,
	Phil Yang <Phil.Yang@arm.com>, nd <nd@arm.com>,
	"stable@dpdk.org" <stable@dpdk.org>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v2 2/5] app/testpmd: enable burst stats for flowgen mode rx path
Date: Mon, 6 Jul 2020 18:46:50 +0000
Message-ID: <DB6PR0802MB2216A523F2AD68066DE2A7FC98690@DB6PR0802MB2216.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <d9b6d66d-2deb-1292-f6b0-731455664b4d@intel.com>

<snip>

> >
> >> Subject: Re: [PATCH v2 2/5] app/testpmd: enable burst stats for
> >> flowgen mode rx path
> >>
> >> On 6/26/2020 11:09 PM, Honnappa Nagarahalli wrote:
> >>> Enable missing burst stats for rx path for flowgen mode.
> >>>
> >>> Fixes: e9e23a617eb8 ("app/testpmd: add flowgen forwarding engine")
> >>> Cc: stable@dpdk.org
> >>>
> >>> Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> >>> Reviewed-by: Phil Yang <phil.yang@arm.com>
> >>> Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
> >>> Tested-by: Phil Yang <phil.yang@arm.com>
> >>> ---
> >>>  app/test-pmd/flowgen.c | 4 ++++
> >>>  1 file changed, 4 insertions(+)
> >>>
> >>> diff --git a/app/test-pmd/flowgen.c b/app/test-pmd/flowgen.c index
> >>> 4bd351e67..011887c61 100644
> >>> --- a/app/test-pmd/flowgen.c
> >>> +++ b/app/test-pmd/flowgen.c
> >>> @@ -111,6 +111,10 @@ pkt_burst_flow_gen(struct fwd_stream *fs)
> >>>  	/* Receive a burst of packets and discard them. */
> >>>  	nb_rx = rte_eth_rx_burst(fs->rx_port, fs->rx_queue, pkts_burst,
> >>>  				 nb_pkt_per_burst);
> >>> +#ifdef RTE_TEST_PMD_RECORD_BURST_STATS
> >>> +	fs->rx_burst_stats.pkt_burst_spread[nb_rx]++;
> >>> +#endif
> >>> +
> >>
> >> Flow generator is for Tx, what is the point of getting stats for the Rx?
> > Is there any reason for this mode to receive the packets?
> > The reason I ask is, the core cycles include the RX call as well. So, we have
> cycles/packet that includes the RX call and burst stats that does not show the
> RX burst stats.
> > Do we need to remove the call to rte_eth_rx_burst API?
> >
> 
> The implementation receives packets and frees them immediately.
> I assume the Rx is implemented in case port receives packets, like if other end
> forwards the generated packets back to same port.
I tried to find more info, there is not a lot. The original commit message says 'it is similar to 'txonly' engine, but will generate multiple L4 flows'.
Your assumption seems reasonable to me. In that case, I think it makes sense to include 'core cycles' only for TX. Otherwise, there is not enough information to debug any issues.

> Yes it consumes cycles for Rx but received packets are ignored, I am not sure if
> received packets have any meaning in flowgen to get additional burst stats.
Please see above, I think we need to adjust how the 'core cycles' are counted in this case.

  reply	other threads:[~2020-07-06 18:47 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-17 14:43 [dpdk-dev] [PATCH 1/5] app/testpmd: clock gettime call in throughput calculation Honnappa Nagarahalli
2020-06-17 14:43 ` [dpdk-dev] [PATCH 2/5] app/testpmd: enable burst stats for flowgen mode rx path Honnappa Nagarahalli
2020-06-18 14:57   ` Phil Yang
2020-06-17 14:43 ` [dpdk-dev] [PATCH 3/5] app/testpmd: enable burst stats for noisy vnf mode Honnappa Nagarahalli
2020-06-18  7:16   ` Jens Freimann
2020-06-17 14:43 ` [dpdk-dev] [PATCH 4/5] app/testpmd: fix burst percentage calculation Honnappa Nagarahalli
2020-06-18 15:01   ` Phil Yang
2020-06-23 13:33   ` Ali Alnubani
2020-06-17 14:43 ` [dpdk-dev] [PATCH 5/5] app/testpmd: enable empty polls in burst stats Honnappa Nagarahalli
2020-06-18 15:05   ` Phil Yang
2020-06-23 13:34   ` Ali Alnubani
2020-06-17 15:16 ` [dpdk-dev] [PATCH 1/5] app/testpmd: clock gettime call in throughput calculation Jerin Jacob
2020-06-18  4:03   ` Honnappa Nagarahalli
2020-06-18 10:16     ` Jerin Jacob
2020-06-18 15:08 ` Phil Yang
2020-06-23 13:33 ` Ali Alnubani
2020-06-26 22:09 ` [dpdk-dev] [PATCH v2 " Honnappa Nagarahalli
2020-06-26 22:09   ` [dpdk-dev] [PATCH v2 2/5] app/testpmd: enable burst stats for flowgen mode rx path Honnappa Nagarahalli
2020-07-06 16:02     ` Ferruh Yigit
2020-07-06 17:06       ` Honnappa Nagarahalli
2020-07-06 17:17         ` Ferruh Yigit
2020-07-06 18:46           ` Honnappa Nagarahalli [this message]
2020-06-26 22:09   ` [dpdk-dev] [PATCH v2 3/5] app/testpmd: enable burst stats for noisy vnf mode Honnappa Nagarahalli
2020-07-06 16:08     ` Ferruh Yigit
2020-07-06 16:59       ` Honnappa Nagarahalli
2020-07-06 17:11         ` Ferruh Yigit
2020-07-06 17:41           ` Honnappa Nagarahalli
2020-06-26 22:09   ` [dpdk-dev] [PATCH v2 4/5] app/testpmd: fix burst percentage calculation Honnappa Nagarahalli
2020-07-06 16:10     ` Ferruh Yigit
2020-06-26 22:09   ` [dpdk-dev] [PATCH v2 5/5] app/testpmd: enable empty polls in burst stats Honnappa Nagarahalli
2020-07-06 17:05     ` Ferruh Yigit
2020-07-06 19:11       ` Honnappa Nagarahalli
2020-07-07  9:32         ` Ferruh Yigit
2020-07-06 15:36   ` [dpdk-dev] [PATCH v2 1/5] app/testpmd: clock gettime call in throughput calculation Ferruh Yigit
2020-07-06 16:53     ` Honnappa Nagarahalli
2020-07-06 17:19       ` Ferruh Yigit
2020-07-06 23:32 ` [dpdk-dev] [PATCH v3 1/3] " Honnappa Nagarahalli
2020-07-06 23:32   ` [dpdk-dev] [PATCH v3 2/3] app/testpmd: fix burst percentage calculation Honnappa Nagarahalli
2020-07-06 23:32   ` [dpdk-dev] [PATCH v3 3/3] app/testpmd: enable empty polls in burst stats Honnappa Nagarahalli
2020-07-07 17:47   ` [dpdk-dev] [PATCH v3 1/3] app/testpmd: clock gettime call in throughput calculation Ferruh Yigit

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=DB6PR0802MB2216A523F2AD68066DE2A7FC98690@DB6PR0802MB2216.eurprd08.prod.outlook.com \
    --to=honnappa.nagarahalli@arm.com \
    --cc=Phil.Yang@arm.com \
    --cc=Ruifeng.Wang@arm.com \
    --cc=alialnu@mellanox.com \
    --cc=beilei.xing@intel.com \
    --cc=bernard.iremonger@intel.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=hemant.agrawal@nxp.com \
    --cc=jerinj@marvell.com \
    --cc=nd@arm.com \
    --cc=orgerlitz@mellanox.com \
    --cc=stable@dpdk.org \
    --cc=thomas@monjalon.net \
    --cc=viacheslavo@mellanox.com \
    --cc=wenzhuo.lu@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git