WO2009145098A1 - I/o接続システム、方法及びプログラム - Google Patents
I/o接続システム、方法及びプログラム Download PDFInfo
- Publication number
- WO2009145098A1 WO2009145098A1 PCT/JP2009/059302 JP2009059302W WO2009145098A1 WO 2009145098 A1 WO2009145098 A1 WO 2009145098A1 JP 2009059302 W JP2009059302 W JP 2009059302W WO 2009145098 A1 WO2009145098 A1 WO 2009145098A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- host
- hot
- hot plug
- processing
- program
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4411—Configuring for operating with peripheral devices; Loading of device drivers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/40—Bus coupling
Definitions
- the present invention relates to an Io connection system in which a plurality of hosts and one or more I / Os (input / output ports) are connected, and more particularly, to an I I ⁇ hot plug and a hot remove in this type of IZO connection system.
- Background technology :
- Connection system 300 is host 1a, 1b, Ethernet (registered trademark) switch 3, I node 06a, 6b, upstream PC I Express 1 Ethernet (registered trademark) bridge 7a, 7b (below) These consist of upstream bridges 7a and 7b), system manager 8, and downstream bridges 9a and 9b.
- Host la is loaded as software into CPU 15a, memory 1 7a, CPU 1 5a, memory 1 7a, north bridge 16a that connects upstream bridge 7a, and CPU 1 5a, IZ06 a host 1 a hot plug processing unit 1 la that processes hot plugs to a a and CPU 15 a is loaded as software, and I 06 a and 6 b hosts 1 a hot remove processing that processes hot removal Part 1 2 a. The same applies to host lb.
- Switch 3 connects the upstream bridges 7a and 7b and the downstream bridges 9a and 9b to each other.
- l Z06 a, 6 b are assigned to hosts l a, 1 b on demand.
- the upstream bridge 7a connects the host 1a and Ethernet (registered trademark).
- the upstream bridge 7 b connects the host 1 b and Ethernet (registered trademark).
- the system manager 8 sets up the connection between the upstream bridges 7a and 7b and the downstream bridges 9a and 9b.
- the downstream bridge 9 a connects the I / O 6 a and Ethernet (registered trademark).
- the flow bridge 9 b connects the I / O 6 b and Ethernet (registered trademark).
- the system manager 8 uses the control frame to set that the downstream bridge 9a is connected to the upstream bridge 7a. With this setting, the I / O 6a connected to the downstream bridge 9a is assigned to the host 1a connected to the upstream bridge 7a.
- the downstream bridge 9a that has received the control frame raises an interrupt to the CPU 15a of the host 1a in order to notify that the newly connected host 1a has been assigned the I / O 6a.
- This interrupt calls the hot plug processing unit 1 1 a to start the hot plug processing.
- I 0 6 a assigned to host 1 a is searched, the device driver corresponding to I / O 6 a is loaded, and assigned to the connection I ZO information held by host 1 a. I ⁇ 6 a is registered.
- the allocated I 6 O 6 a can be used by the host 1 a.
- the interruption to C P U 15 a performed by the downstream bridge 9 a may be performed by the upstream bridge 7 a connected to the host 1 a to which the I O 6 a is assigned.
- the upstream bridge 7 a detects that the connected downstream bridge 9 a is connected to another upstream bridge 7 b by the control bucket from the system manager 8 and raises an interrupt to C P U 15 a. This interrupt calls the hot remove processor 1 2 a and starts hot remove processing.
- I / O hot plug processing in a conventional I / O connection system, after receiving an instruction to start hot plug processing, it takes time to turn on the I ZO slot and enable it accordingly. Next, processing was performed, such as processing to feed the device driver corresponding to ⁇ ⁇ and processing to update connection I information held by the host.
- the process group that constitutes the hot plug process can be executed even if it is not connected to the I ⁇ ⁇ ⁇ to be hot plugged, and can be executed if it is not connected.
- the present invention has been made in view of such a situation, and a problem to be solved by the present invention is to shorten the time from the start of the hot plug process to the completion thereof.
- the present invention provides the following techniques.
- a hot plug process comprising a plurality of processes for connecting the nodes to the host is executed.
- the hot plug processing means completes the hot plug processing means (hot plug processing section 11) and the first hot plug processing which is one or more predetermined processes in the hot plug processing.
- a stop instruction means (hot plug synchronization unit 13) that instructs hot plug processing means to stop the hot plug processing means and a connection between the host and I / ⁇ are established, and the host can access I ⁇ .
- the hot plug processing means is notified of the first hot plug in the hot plug processing.
- the first hot plug process includes, for example, a process of turning on and enabling the power of the I slot.
- the second hot plug process includes, for example, a process of loading a device driver corresponding to ⁇ ⁇ and a process of updating connection I ⁇ information held by the host.
- the present invention provides an I node connection system including a plurality of hosts connected to each other via a network and one to a plurality of I nodes.
- I ⁇ connection system characterized in that at least a part of the process for hot-removing and the process for hot-plugging I ⁇ to a second host different from the first host are executed in parallel. I will provide a.
- an I node connection system including a plurality of hosts connected to each other via a network and a plurality of I nodes, a connection between the first host and the I node.
- First detection means hot-removal notification section of switching source host, step ⁇ 3 for detecting the completion of processing performed by the first host accessing I node
- Host switching means downstream bridge, step ⁇ 4 that switches the I / O connection destination from the first host to a second host different from the first host in response to detection by the first detection means.
- a means for initiating hot plug processing between the second host and I ⁇ ⁇ (hot plug synchronizer, step A 2) prior to completion of the entire hot remove process in the first host, and hot plug processing Out of the second Stop method (hot-plug synchronization part of the switching destination host, step A 3) that detects the completion of the process performed by the host without accessing the I / O and stops the hot-plug process, and the second host
- the second detection means upstream bridge of the switching destination host, step ⁇ 5) that detects that access to / O has become accessible, and the hot means that the stop means has stopped in response to detection by the second detection means
- a connection system characterized by comprising means for restarting plug processing (hot plug synchronization unit of switching destination host, step ⁇ 7).
- the present invention is connected to each other via a network.
- a hot plug process consisting of multiple processes for connecting I Zo to the host
- a stop phase for stopping the hot plug process and a connection between the host and the I node are established.
- Detection stage to detect that the host is accessible to the I node, and start to start the second hot plug process, which is a process other than the first hot plug process in the hot plug process, according to the detection And providing an I-NO 0 connection method.
- a host and an I can be connected to an I in a connection system including a plurality of hosts connected to each other via a network and one to a plurality of I nodes.
- the process for hot-removing I Zo from the first host and the process for hot-plugging 10 to a second host different from the first host Provide a connection method characterized by executing at least a part in parallel.
- a host and an I / O connection system including a plurality of hosts connected to each other via a network and one to a plurality of I ⁇ s.
- the first host detects the completion of the process performed by the first host accessing I 0 in the hot removal process between the first host and I node.
- the connection destination of ⁇ ⁇ is changed from the first host to the first host.
- a host switching phase downstream ridge, step ⁇ 4) to switch to a different second host and a hot plug between the second host and I ⁇ prior to the completion of the entire hot removal process on the first host
- the second host detects the completion of the process without accessing I / O and stops the hot-plug process.
- Stop stage switch destination The hot-plug synchronization part of the host, step A 3) and the second detection stage to detect that the second host can access I / O (upstream bridge of the target host, step A 5)
- the hot plug process stopped in the stop stage is restarted (at the destination host
- An I ZO connection method comprising a hot plug synchronization unit and step A 7).
- the present invention provides a program executed by a computer that operates as a host of an I I ⁇ connection system including a plurality of hosts connected to each other via a network and one or more I ⁇ .
- a hot plug processing means (hot plug processing unit 1 1) for executing hot plug processing consisting of a plurality of processes for connecting I / ⁇ to the host, a predetermined one of the hot plug processes Stop instruction means for instructing the hot plug processing means to stop hot plug processing means in response to completion of the first hot plug processing, which is a plurality of processes (hot plug synchronization section 1 3 ),
- detecting means upstream bridge 2) for detecting that the connection between the host and ⁇ ⁇ has been established and that the host can access the I node.
- hot plug processing means In response to the detection by the start instruction means for instructing the hot plug processing means to start the second hot plug process that is a process other than the first hot plug process in the hot plug process (hot plug synchronization unit 1 3) Provide a program characterized by operating a computer.
- FIG. 1 is a block diagram for explaining an I / O connection system 100 according to a first embodiment of the present invention.
- FIG. 2 is a flowchart for explaining the hot plug processing of the I / ⁇ connection system 100.
- FIG. 3 is a flow chart for explaining the hot removal process of the I / ⁇ ⁇ ⁇ ⁇ connection system 100.
- FIG. 4 is a block diagram for explaining an I / O connection system 200 which is Embodiment 2 of the present invention.
- FIG. 5 is a block diagram for explaining a conventional IZO connection system 300. Best Mode for Carrying Out the Invention:
- the I ZO connection system 1 0 0 is the host 1 a, lb, upstream PCI Express Ethernet 1 Ethernet bridge 2 a, 2 b (hereinafter referred to as upstream bridge 2 a, 2 b, respectively) ), Ethernet (registered trademark) switch 3 (hereinafter referred to as switch 3), system manager 4, downstream PCI Express 1 Ethernet (registered trademark) bridge 5a, 5b (hereinafter referred to as downstream bridge 5a, 5b) , Ino O 6 a, 6 b.
- Host 1a includes hot plug processor 1 1a, hot remove processor 1 2a, hot plug synchronizer 1 3a, hot remove notification unit 1 4a, CPU 1 5a, north bridge 1 6a, memory 1 7 Provide with a.
- the hot plug processing unit 1 1 a, hot removal processing unit 1 2 a, hot plug synchronization unit 1 3 a, and hot rim removal notification unit 1 4 a are programs that are read and executed by the CPU 15 5 a.
- the hot plug processing unit 1 1 a processes hot plugs to the host 1 a of I node 0 6 a or 6 b.
- the hot removal processing unit 1 2 b processes hot removal from the host 1 a of I 0 6 a or 6 b.
- the hot plug synchronization unit 1 3 a calls the hot plug processing unit 1 1 a under the control of the system manager 4.
- the hot plug synchronization unit 1 3 a completes the operation up to the point just before accessing the I-no 6 a or 6 b assigned to the hot plug processing unit 1 1 a force host 1 1 a, and the hot plug processing unit 1 1 a Stop the rest of the operation.
- the hot plug synchronization unit 1 3 a polls the hot plug start flag 2 1 a mapped to its own address space and confirms the assertion of the hot plug start flag 2 1 a.
- Ho The plug processing unit 1 1 a causes the remaining operations to be executed.
- the hot-removal notification unit 1 4 a notifies the operation of the hot-removal processing unit 1 2 a.
- the hot-removal notification unit 14 a detects the step when the access to the I / O 6 a of the hot-removal processing unit 12 a is completed, and in this step the hot-removal notification unit 14 a own address space Assert Mapped Hot Remove Notification Flag 22a.
- North bridge 16a connects CPU 15a, memory 17a and upstream bridge 2a to each other. The same applies to host 1 b as host 1 a.
- the upstream bridge 2a connects the host 1a and Ethernet (registered trademark). Upstream bridge 2 a tunnels TP (T r a s a c t i o n La y e r P a c k e t), which is a PC Ix press knot, with downstream bridge 5 a or 5 b to be connected.
- the upstream bridge 2a includes a hot plug start flag 21a and a hot removal notification flag 22a.
- the upstream bridge 2a detects from the control frame issued by the downstream bridge 5a or 5b that the IO 6a or 6b assigned to the host 1a is accessible, and the hot plug start flag 2 1 Assert a.
- the upstream bridge 2a is assigned to the downstream bridge 5a or 5b to the I ZO 6a or 6 Use a control frame to notify b to move to another host.
- the function and configuration of the upstream bridge 2b are the same as those of the upstream bridge 2a, so the description is omitted.
- Switch 3 connects upstream bridges 2a, 2b and downstream bridges 5a, 5b.
- the system manager 4 sets up a connection between the upstream bridges 2a and 2b and the downstream bridges 5a and 5b.
- System Manager 4 performs hot-removal to the upstream bridge connected to that host.
- the control frame is used to notify the host to which that I is assigned next.
- the control frame is used to notify the upstream bridge connected to the host to which a hot-removed I ⁇ ⁇ is newly assigned that the I ⁇ is hot-plugged in advance. Start the hot plug processing unit in the synchronization unit.
- I / O 6a is assigned to host 1a and then assigned to host ib.
- system manager 4 performs hot-removal of I ZO 6 a and follows IO 6 a.
- the upstream bridge 2b is notified using a control frame that I / O 6a is hot plugged.
- the hot plug synchronization unit 1 3 b starts the hot plug processing unit 1 1 b in the host lb.
- the downstream bridge 5 a connects the I ZO 6 a and Ethernet (registered trademark).
- the downstream bridge 5b connects INO 6b and Ethernet (registered trademark).
- the downstream bridge 5a is connected to either the upstream bridge 2a or 2b.
- the upstream bridge to be connected can be changed by the control frame of the upstream bridge. The same applies to the downstream ply 5b.
- l Z0 6a and 6b consist of computer peripherals equipped with an interface for connecting to this port in addition to the I / O port, and are assigned to the hosts 1a and 1b as required.
- the input / output port is specifically a P C I e port.
- any device having a PCI interface may be used.
- an auxiliary storage device such as a hard disk device or a magneto-optical disk device or a network interface may be used.
- the upstream bridge 2 a is notified by the control frame to start hot plug processing in preparation for allocation of I 6 O 6 a from the system manager 4 (step A 1).
- the upstream bridge 2 a calls the hot plug synchronizer 1 3 a by interrupt.
- the called hot plug synchronization unit 1 3 a performs the operation of the hot plug processing unit 1 1 a. Start (step A 2).
- the hot-plug synchronization unit 1 3 a searches for I Z0 6 a to which the hot-plug processing unit 1 1 a is assigned, and thus completes the operation of the hot-plug processing unit 1 1 a until just before accessing the I / O 6 a. Stop at that step (step A3). Prior to accessing I / O 6a, the hot plug process 1 1a completes the time-consuming process such as turning on and enabling the power of the I / O slot.
- the hot plug synchronization unit 13 a polls the hot plug start flag 21 a (step A 4). Since the hot plug start flag 2 1 a is mapped to the address space of the hot plug synchronization unit 1 3 a, the cost of the context switch does not occur at the time of polling.
- the upstream bridge 2 a establishes a connection between the upstream bridge 2 a and the downstream bridge 5 a by the control frame issued by the downstream bridge 5 a connected to the assigned I ZO 6 a. It is detected that access is possible (step A5).
- the connection between the upstream bridge 2a and the downstream bridge 5a is completed by establishing a tunnel for transmitting and receiving TLP.
- the upstream bridge 2a asserts the hot plug start flag 21a (step A6).
- the hot plug processing unit 1 1 a When the hot plug synchronization unit 1 3 a detects that the hot plug start flag 2 1 a is asserted, the hot plug processing unit 1 1 a instructs the hot plug processing unit 1 1 a to resume processing, and in response, the hot plug processing unit 1 3 a 1 1 a executes the last part that requires access to I ZO 6 a, loads the device driver corresponding to I 6 O 6 a, and updates the connection I / O information held by host 1 a (step A 7).
- the device driver loaded here is the device driver for the computer peripheral device connected to the end of the PCI port. After these processes, the hot plug process is completed (step A 8).
- step A2 to A8 The processing from step A2 to A8 is executed entirely or partly as necessary on the CPU 15a as necessary, and context switching to other processing is prevented.
- the hot plug processing unit 11a is preferably executed by exclusive control after the process is resumed.
- the operation when hot removing IO from the host in the IO connection system 100 will be described with reference to FIG.
- the case where I ZO 6a connected to host la is hot removed will be described as an example.
- the hot-removed I-no 6a is then connected to host 1b.
- the system manager 4 issues a control frame to the upstream bridge of the host to which the IO that is going to be hot-removed is currently connected, and hot-removes the I ZO. (Step ⁇ 1).
- system manager 4 can hot-remove I06a and the next connection destination of I / O 6a Issue a control frame to notify upstream bridge 2a that is host 1b.
- the upstream bridge 2a raises an interrupt to the CPU 15a and calls the hot remove processing unit 12a to start the hot remove process (step B2).
- the hot-removal notification unit 14 a detects the step where the hot-removal processing unit 12 a stops the access to I ⁇ 6 a and asserts the hot-removal notification flag 2 2 a (step B 3). Since the hot removal notification flag 2 2 a is mapped to the address space of the hot removal notification unit 1 4 a, the cost of the context switch is not incurred during the assertion.
- step B1 to B3 The processing from step B1 to B3 is executed as a whole or a part of it on the CPU 15a as necessary, and the context switch to other processing is prevented.
- Upstream bridge 2a is connected to IO 6a, whose assignment is changed when hot remove notification flag 2 2a is asserted.
- a control frame is issued to the flow bridge 5a and then notified to start connection with the host 1b to which the IO 6a is assigned (step B4).
- the downstream bridge 5a that has received the control frame starts connection processing with the upstream bridge 2b that is connected to the host ib to which the I O 6a is assigned next by the control frame (step B5).
- the hot removal processing unit 12a of the host 1a continues the processing until the hot removal processing is completed (step B6).
- the hot-removal processing unit 1 2 a performs time-consuming processing such as disabling the I 0 slot and stopping the power supply.
- the system manager 4 issues a control frame to the upstream bridge 2a on the host '1a side to which I ZO 6a is currently connected, hot-removes I 0 6a, and I ZO 6 Notify that the next connection destination of a is host 1b (step B1). In response to this, the above-described hot remove processing is performed between the host 1 a and the I node 0 6 a.
- the system manager 4 issues a control frame for instructing the upstream bridge 2b to start the hot plug process in preparation for allocation of I Z0 6a. (Step A1). In response to this, the above-described hot plug processing is performed between the host 1 b and the I O 6 a.
- hot removal processing unit 1 2a force
- hot removal notification unit 1 4a detects and asserts hot removal notification flag 2 2a, asserts
- the upstream bridge 2a issues a control frame instructing connection to the host 1b to the downstream bridge 5a.
- the host 1 b starts the hot plug process without waiting for the completion of the hot remove process in parallel with the hot remove process in the host 1 a. After executing a process in which access to I 0 6 a is not essential, wait until 1 0 6 a becomes accessible. When hot-removal processing on host 1a is completed and host 1b becomes accessible to IZO 6a, hot-plug processing is resumed.
- the hot plug start flags 2 1 a and 2 1 b are mounted on the upstream bridges 2 a and 2 b, respectively.
- the hot plug start flag 1 7 1 a is mounted in the memory 1 7 a and the hot plug start is started.
- the hot flag start flag 1 7 1 a is mapped to the memory space of the hot plug synchronizer 1 3 a. For this reason, the cost of the context switch does not occur when the hot plug synchronization unit 1 3 a polls the hot plug start flag 2 1 a.
- the hot plug start flag 1 7 1 b is the memory space of the hot plug synchronization unit 1 3 b. When the hot plug synchronization unit 1 3 b polls the hot plug start flag 2 1 b, the cost of the context switch is not incurred.
- Ethernet registered trademark
- the present invention is not limited to this, and an equivalent function is described. It may be other network means to realize
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/736,808 US8990468B2 (en) | 2008-05-28 | 2009-05-14 | I/O connection system, method and program |
JP2010514449A JP5645014B2 (ja) | 2008-05-28 | 2009-05-14 | I/o接続システム、方法及びプログラム |
Applications Claiming Priority (2)
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JP2008-139315 | 2008-05-28 | ||
JP2008139315 | 2008-05-28 |
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WO2009145098A1 true WO2009145098A1 (ja) | 2009-12-03 |
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PCT/JP2009/059302 WO2009145098A1 (ja) | 2008-05-28 | 2009-05-14 | I/o接続システム、方法及びプログラム |
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US (1) | US8990468B2 (ja) |
JP (1) | JP5645014B2 (ja) |
WO (1) | WO2009145098A1 (ja) |
Cited By (1)
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CN103415845A (zh) * | 2011-03-09 | 2013-11-27 | 日本电气株式会社 | 网络系统 |
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US8443126B2 (en) * | 2010-09-22 | 2013-05-14 | Wilocity, Ltd. | Hot plug process in a distributed interconnect bus |
KR102147629B1 (ko) * | 2013-11-18 | 2020-08-27 | 삼성전자 주식회사 | 플렉시블 서버 시스템 |
CN105701051B (zh) * | 2016-01-15 | 2019-10-15 | 华为技术有限公司 | 一种热插拔方法、主机控制器、主机及PCIe桥设备 |
CN108139924B (zh) | 2016-05-31 | 2021-10-08 | 安华高科技股份有限公司 | 热插拔硬件及软件实施方案 |
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- 2009-05-14 WO PCT/JP2009/059302 patent/WO2009145098A1/ja active Application Filing
- 2009-05-14 US US12/736,808 patent/US8990468B2/en active Active
- 2009-05-14 JP JP2010514449A patent/JP5645014B2/ja active Active
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CN103415845A (zh) * | 2011-03-09 | 2013-11-27 | 日本电气株式会社 | 网络系统 |
EP2685385A1 (en) * | 2011-03-09 | 2014-01-15 | Nec Corporation | Network system |
US20140059250A1 (en) * | 2011-03-09 | 2014-02-27 | Nec Corporation | Network system |
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Also Published As
Publication number | Publication date |
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JP5645014B2 (ja) | 2014-12-24 |
US20110072182A1 (en) | 2011-03-24 |
US8990468B2 (en) | 2015-03-24 |
JPWO2009145098A1 (ja) | 2011-10-13 |
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