From: Yanteng Si <siyanteng@loongson.cn>
To: corbet@lwn.net
Cc: Yanteng Si <siyanteng@loongson.cn>,
alexs@kernel.org, chenhuacai@kernel.org, jiaxun.yang@flygoat.com,
linux-doc@vger.kernel.org, realpuyuwang@gmail.com,
bobwxc@email.cn, siyanteng01@gmail.com
Subject: [PATCH v7 02/11] docs/zh_CN: add core-api irq irq-affinity.rst translation
Date: Fri, 16 Apr 2021 18:32:25 +0800 [thread overview]
Message-ID: <d235db96434baf472441877fc8ffca0f6f70a9f5.1618568135.git.siyanteng@loongson.cn> (raw)
In-Reply-To: <cover.1618568135.git.siyanteng@loongson.cn>
This patch translates Documentation/core-api/irq/irq-affinity.rst into Chinese.
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Wu XiangCheng <bobwxc@email.cn>
---
.../zh_CN/core-api/irq/irq-affinity.rst | 76 +++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 Documentation/translations/zh_CN/core-api/irq/irq-affinity.rst
diff --git a/Documentation/translations/zh_CN/core-api/irq/irq-affinity.rst b/Documentation/translations/zh_CN/core-api/irq/irq-affinity.rst
new file mode 100644
index 000000000000..82a4428f22fd
--- /dev/null
+++ b/Documentation/translations/zh_CN/core-api/irq/irq-affinity.rst
@@ -0,0 +1,76 @@
+.. include:: ../../disclaimer-zh_CN.rst
+
+:Original: :doc:`../../../../core-api/irq/irq-affinity`
+:Translator: Yanteng Si <siyanteng@loongson.cn>
+
+.. _cn_irq-affinity.rst:
+
+
+==============
+SMP IRQ 亲和性
+==============
+
+变更记录:
+ - 作者:最初由Ingo Molnar <mingo@redhat.com>开始撰写
+ - 后期更新维护: Max Krasnyansky <maxk@qualcomm.com>
+
+
+/proc/irq/IRQ#/smp_affinity和/proc/irq/IRQ#/smp_affinity_list指定了哪些CPU能
+够关联到一个给定的IRQ源,这两个文件包含了这些指定cpu的cpu位掩码(smp_affinity)和cpu列
+表(smp_affinity_list)。它不允许关闭所有CPU, 同时如果IRQ控制器不支持中断请求亲和
+(IRQ affinity),那么所有cpu的默认值将保持不变(即关联到所有CPU).
+
+/proc/irq/default_smp_affinity指明了适用于所有非激活IRQ的默认亲和性掩码。一旦IRQ被
+分配/激活,它的亲和位掩码将被设置为默认掩码。然后可以如上所述改变它。默认掩码是0xffffffff。
+
+下面是一个先将IRQ44(eth1)限制在CPU0-3上,然后限制在CPU4-7上的例子(这是一个8CPU的SMP box)
+
+::
+
+ [root@moon 44]# cd /proc/irq/44
+ [root@moon 44]# cat smp_affinity
+ ffffffff
+
+ [root@moon 44]# echo 0f > smp_affinity
+ [root@moon 44]# cat smp_affinity
+ 0000000f
+ [root@moon 44]# ping -f h
+ PING hell (195.4.7.3): 56 data bytes
+ ...
+ --- hell ping statistics ---
+ 6029 packets transmitted, 6027 packets received, 0% packet loss
+ round-trip min/avg/max = 0.1/0.1/0.4 ms
+ [root@moon 44]# cat /proc/interrupts | grep 'CPU\|44:'
+ CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
+ 44: 1068 1785 1785 1783 0 0 0 0 IO-APIC-level eth1
+
+从上面一行可以看出,IRQ44只传递给前四个处理器(0-3)。
+现在让我们把这个IRQ限制在CPU(4-7)。
+
+::
+
+ [root@moon 44]# echo f0 > smp_affinity
+ [root@moon 44]# cat smp_affinity
+ 000000f0
+ [root@moon 44]# ping -f h
+ PING hell (195.4.7.3): 56 data bytes
+ ..
+ --- hell ping statistics ---
+ 2779 packets transmitted, 2777 packets received, 0% packet loss
+ round-trip min/avg/max = 0.1/0.5/585.4 ms
+ [root@moon 44]# cat /proc/interrupts | 'CPU\|44:'
+ CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
+ 44: 1068 1785 1785 1783 1784 1069 1070 1069 IO-APIC-level eth1
+
+这次IRQ44只传递给最后四个处理器。
+即CPU0-3的计数器没有变化。
+
+下面是一个将相同的irq(44)限制在cpus 1024到1031的例子
+
+::
+
+ [root@moon 44]# echo 1024-1031 > smp_affinity_list
+ [root@moon 44]# cat smp_affinity_list
+ 1024-1031
+
+需要注意的是,如果要用位掩码来做这件事,就需要32个为0的位掩码来追踪其相关的一个。
--
2.27.0
next prev parent reply other threads:[~2021-04-16 10:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 10:32 [PATCH v7 00/11] docs/zh_CN: add core api and openrisc translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 01/11] docs/zh_CN: add core-api irq concepts.rst translation Yanteng Si
2021-04-16 10:32 ` Yanteng Si [this message]
2021-04-16 10:32 ` [PATCH v7 03/11] docs/zh_CN: add core-api irq irq-domain.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 04/11] docs/zh_CN: add core-api irq irqflags-tracing.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 05/11] docs/zh_CN: add core-api irq index.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 06/11] docs/zh_CN: add core-api " Yanteng Si
2021-04-16 10:32 ` [PATCH v7 07/11] docs/zh_CN: add core api translation to zh_CN index Yanteng Si
2021-04-16 10:32 ` [PATCH v7 08/11] docs/zh_CN: add openrisc openrisc_port.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 09/11] docs/zh_CN: add openrisc todo.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 10/11] docs/zh_CN: add openrisc index.rst translation Yanteng Si
2021-04-16 10:32 ` [PATCH v7 11/11] docs/zh_CN: add openrisc translation to zh_CN index Yanteng Si
2021-04-16 11:58 ` Wu X.C.
2021-04-20 22:10 ` [PATCH v7 00/11] docs/zh_CN: add core api and openrisc translation Jonathan Corbet
2021-04-21 1:34 ` teng sterling
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