linux-kernel - Re: [PATCH] irqchip/sifive-plic: add irq_mask and irq

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Date:   Fri, 20 Sep 2019 16:28:48 +0300
From:   David Abdurachmanov <david.abdurachmanov@...ive.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>
Cc:     Marc Zyngier <maz@...nel.org>, Palmer Dabbelt <palmer@...ive.com>,
        Darius Rad <darius@...espec.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        tglx@...utronix.de, jason@...edaemon.net
Subject: Re: [PATCH] irqchip/sifive-plic: add irq_mask and irq_unmask

On Tue, Sep 17, 2019 at 3:26 PM Paul Walmsley <paul.walmsley@...ive.com> wrote:
>
>
> Just tested this on the SiFive HiFive Unleashed.  Seems to work OK;
> however I did not stress-test it.
>
> Tested-by: Paul Walmsley <paul.walmsley@...ive.com> # HiFive Unleashed
>
>
> - Paul
>
>
> # !cat
> cat /proc/interrupts
>            CPU0       CPU1       CPU2       CPU3
>   1:          0          0          0          0  SiFive PLIC   5  10011000.serial
>   3:          0          0          0          0  SiFive PLIC  51  10040000.spi
>   4:       6266          0          0          0  SiFive PLIC   4  10010000.serial
>   5:        102          0          0          0  SiFive PLIC   6  10050000.spi
>   6:         37          0          0          0  SiFive PLIC  53  eth0
> IPI0:      1134      21128       9024     220261  Rescheduling interrupts
> IPI1:        10        143         18          7  Function call interrupts
> IPI2:         0          0          0          0  CPU stop interrupts
> #

I have applied the patch on top of 5.2.9 kernel and tried to stress it
with stress-ng interrupt stressors for 2:30+ hours.

# cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3
  1:          0          0          0          0  SiFive PLIC   5
10011000.serial
  3:          0          0          0          0  SiFive PLIC  51  10040000.spi
  4:      34240          0          0          0  SiFive PLIC   4
10010000.serial
  5:        102          0          0          0  SiFive PLIC   6  10050000.spi
  6:          0          0          0          0  SiFive PLIC  53  eth0
  7:          0          0          0          0  SiFive PLIC  32
microsemi-pcie
IPI0:  32013933   28068736   29345256   23346339  Rescheduling interrupts
IPI1:     78514      78586      63144     100317  Function call interrupts
IPI2:         0          0          0          0  CPU stop interrupts