Re: [PATCH] arm64: defconfig: enable fine-grained task level IRQ time accounting

2017-08-03 Thread Gregory CLEMENT
Hi Marcin, On lun., juil. 31 2017, Marcin Wojtas wrote: > Tests showed, that under certain conditions, the summary number of jiffies > spent on softirq/idle, which are counted by system statistics can be even > below 10% of expected value, resulting in false load presentation. > > The issue wa

Re: [PATCH] arm64: defconfig: enable fine-grained task level IRQ time accounting

2017-08-02 Thread Catalin Marinas
On Wed, Aug 02, 2017 at 03:11:43PM +0200, Gregory CLEMENT wrote: > On lun., juil. 31 2017, Marcin Wojtas wrote: > > Tests showed, that under certain conditions, the summary number of jiffies > > spent on softirq/idle, which are counted by system statistics can be even > > below 10% of expected va

Re: [PATCH] arm64: defconfig: enable fine-grained task level IRQ time accounting

2017-08-02 Thread Gregory CLEMENT
Hi, (Adding Arnd and Olof) On lun., juil. 31 2017, Marcin Wojtas wrote: > Tests showed, that under certain conditions, the summary number of jiffies > spent on softirq/idle, which are counted by system statistics can be even > below 10% of expected value, resulting in false load presentation.

[PATCH] arm64: defconfig: enable fine-grained task level IRQ time accounting

2017-07-31 Thread Marcin Wojtas
Tests showed, that under certain conditions, the summary number of jiffies spent on softirq/idle, which are counted by system statistics can be even below 10% of expected value, resulting in false load presentation. The issue was observed on the quad-core Marvell Armada 8k SoC, whose two 10G ports