From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
dev@dpdk.org, alialnu@mellanox.com, orgerlitz@mellanox.com,
wenzhuo.lu@intel.com, beilei.xing@intel.com,
bernard.iremonger@intel.com
Cc: hemant.agrawal@nxp.com, jerinj@marvell.com,
viacheslavo@mellanox.com, thomas@monjalon.net,
ruifeng.wang@arm.com, phil.yang@arm.com, nd@arm.com,
zhihong.wang@intel.com, stable@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 1/3] app/testpmd: clock gettime call in throughput calculation
Date: Tue, 7 Jul 2020 18:47:21 +0100 [thread overview]
Message-ID: <448ae078-47d7-0287-7fc9-63d8d026664f@intel.com> (raw)
In-Reply-To: <20200706233231.25881-1-honnappa.nagarahalli@arm.com>
On 7/7/2020 12:32 AM, Honnappa Nagarahalli wrote:
> The throughput calculation requires a counter that measures
> passing of time. However, the kernel saves and restores the PMU
> state when a thread is unscheduled and scheduled. This ensures
> that the PMU cycles are not counted towards a thread that is
> not scheduled. Hence, when RTE_ARM_EAL_RDTSC_USE_PMU is enabled,
> the PMU cycles do not represent the passing of time.
> This results in incorrect calculation of throughput numbers.
> Use clock_gettime system call to calculate the time passed since
> last call.
>
> Bugzilla ID: 450
> Fixes: 0e106980301d ("app/testpmd: show throughput in port stats")
> Cc: zhihong.wang@intel.com
> 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>
> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
> Tested-by: Phil Yang <phil.yang@arm.com>
> Tested-by: Ali Alnubani <alialnu@mellanox.com>
Series applied to dpdk-next-net/master, thanks.
prev parent reply other threads:[~2020-07-07 17:47 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-17 14:43 [dpdk-dev] [PATCH 1/5] " 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
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 ` Ferruh Yigit [this message]
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