From: Thomas Monjalon <thomas@monjalon.net>
To: ilia.kurakin@intel.com
Cc: dev@dpdk.org, jerin.jacob@caviumnetworks.com,
keith.wiles@intel.com, dmitry.galanov@intel.com
Subject: Re: [dpdk-dev] [PATCH v8] ether: add support for vtune task tracing
Date: Fri, 22 Sep 2017 19:04:36 +0200 [thread overview]
Message-ID: <3715398.bgRVv9I6lK@xps> (raw)
In-Reply-To: <20170922145229.28463-1-ilia.kurakin@intel.com>
22/09/2017 16:52, ilia.kurakin@intel.com:
> From: Ilia Kurakin <ilia.kurakin@intel.com>
>
> The patch simplifies DPDK applications analysis for developers which use
> Intel® VTune Amplifier.
>
> The empty cycles are such iterations that yielded no RX packets. As far as
> DPDK is running in poll mode, wasting cycles is equal to wasting CPU time.
> Tracing such iterations can identify that device is underutilized. Tracing
> empty cycles becomes even more critical if a system uses a lot of Ethernet
> ports.
>
> The patch gives possibility to analyze empty cycles without changing
> application code. All needs to be done is just to reconfigure and rebuild
> the DPDK itself with CONFIG_RTE_ETHDEV_PROFILE_ITT_WASTED_RX_ITERATIONS
> enbled. The important thing here is that this does not affect DPDK code.
> The profiling code is not being compiled if user does not specify config
> flag.
>
> The patch provides common way to inject RX queues profiling and VTune
> specific implementation.
>
> Signed-off-by: Ilia Kurakin <ilia.kurakin@intel.com>
Applied with previous Ack from Jerin, thanks
prev parent reply other threads:[~2017-09-22 17:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-19 17:18 [dpdk-dev] [PATCH] " ilia.kurakin
2017-06-22 9:42 ` Ananyev, Konstantin
2017-06-22 12:12 ` Kurakin, Ilia
2017-06-22 16:46 ` Galanov, Dmitry
2017-06-27 13:16 ` ilia.kurakin
2017-06-30 3:30 ` Jerin Jacob
2017-06-30 10:13 ` Ananyev, Konstantin
2017-07-06 16:42 ` [dpdk-dev] [PATCH v2] " ilia.kurakin
2017-07-10 12:30 ` Jerin Jacob
2017-07-11 17:24 ` [dpdk-dev] [PATCH v3] The patch adds tracing of loop iterations that yielded no packets in a DPDK application. It is using ITT task API: https://software.intel.com/en-us/node/544206 ilia.kurakin
2017-07-11 17:48 ` [dpdk-dev] [PATCH v3] ether: add support for vtune task tracing ilia.kurakin
2017-07-14 5:45 ` Jerin Jacob
2017-07-17 17:15 ` [dpdk-dev] [PATCH v4] " ilia.kurakin
2017-07-19 8:54 ` [dpdk-dev] [PATCH v5] " ilia.kurakin
2017-07-24 9:27 ` Jerin Jacob
2017-07-24 12:33 ` Kurakin, Ilia
2017-09-22 10:19 ` Thomas Monjalon
2017-07-24 17:06 ` [dpdk-dev] [PATCH v6] " ilia.kurakin
2017-09-08 12:57 ` [dpdk-dev] [PATCH v7] " ilia.kurakin
2017-09-22 10:42 ` Thomas Monjalon
2017-09-22 14:52 ` [dpdk-dev] [PATCH v8] " ilia.kurakin
2017-09-22 17:04 ` Thomas Monjalon [this message]
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