JP4410795B2 - 共有リソースの同時アクセス - Google Patents
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- JP4410795B2 JP4410795B2 JP2006506127A JP2006506127A JP4410795B2 JP 4410795 B2 JP4410795 B2 JP 4410795B2 JP 2006506127 A JP2006506127 A JP 2006506127A JP 2006506127 A JP2006506127 A JP 2006506127A JP 4410795 B2 JP4410795 B2 JP 4410795B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/14—Protection against unauthorised use of memory or access to memory
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- 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
- G06F9/46—Multiprogramming arrangements
- G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
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Description
Claims (13)
- コンピュータの共有リソースにアクセスする方法であって、前記共有リソースを使用する複数の要求を非同期的に発することが可能な複数のプロセスのうちの第1のプロセスにおいて、
(a)前記共有リソースを使用する現在の要求に固有の識別子をアトミックに割当てるステップであって、前記固有の識別子を、前記複数のプロセスによって発せられた他の要求に対し前記現在の要求が受け取られる順番に基づいて前記現在の要求に割当てるステップと、
(b)前記固有の識別子を用いる前記現在の要求を準備することにより当該現在の要求の処理を完了させるステップと、
(c)前記現在の要求の処理が完了した後に、完了した要求のカウントをアトミックに増分させるステップと、
(d)前記現在の要求の処理が完了した後に、最近完了した要求より前に発せられた他の要求の処理が完了したかどうかをアトミックに判別するステップと、
(e)前記最近完了した要求より前に発せられた他の要求の処理が完了したという判別に応答して、処理が完了したディスパッチされていない要求の各々をディスパッチするステップと、
を含む方法。 - 前記ステップ(b)が、非アトミックに行われる、請求項1に記載の方法。
- 前記第1のプロセスにおいて、前記現在の要求の処理が完了した後に、前記現在の要求が前記最近完了した要求であるかどうかをアトミックに判別するステップをさらに含む、請求項1に記載の方法。
- 前記第1のプロセスにおいて、前記現在の要求の処理が完了した後に、前記現在の要求が最後のディスパッチ動作の後に発せられた最初の要求であるかどうかをアトミックに判別するステップと、
前記現在の要求が前記最後のディスパッチ動作の後に発せられた最初の要求であるという判別に応答して前記現在の要求をディスパッチするステップをさらに含む、請求項1に記載の方法。 - 前記ステップ(e)が、複数の要求をバッチでディスパッチするステップを含む、請求項1に記載の方法。
- 前記ステップ(a)が、要求カウンタを増分させるステップを含み、
前記ステップ(c)が、完了カウンタを増分させるステップを含み、
前記方法が、
前記現在の要求が最近完了した要求であるという判別に応答して、前記現在の要求の処理が完了した後に、前記現在の要求の前記固有の識別子と同値になるように最後の完了カウンタをアトミックに更新するステップをさらに含み、
前記ステップ(d)が、前記最後の完了カウンタを前記完了カウンタと比較するステップを含み、
前記ステップ(e)が、前記最後の完了カウンタと同値になるように最後のディスパッチ・カウンタを更新するステップを含む、請求項1に記載の方法。 - 前記要求カウンタ、前記完了カウンタ、前記最後の完了カウンタ、及び前記最後のディスパッチ・カウンタの各々が、単調に増加する一連の番号を用いて更新される、請求項6に記載の方法。
- 前記最近完了した要求より前に発せられた他の要求の処理がまだ完了されていないという前記ステップ(d)の否定的な判別に応答して、処理が完了したディスパッチされていない要求の各々のディスパッチを据え置くステップをさらに含み、
前記複数のプロセスのうちの第2のプロセスにおいて、
前記現在の要求より前に割当てられた固有の識別子を有する、前記現在の要求に対し先行する要求の処理を完了させるステップと、
前記先行する要求の処理が完了した後に、前記最近完了した要求より前に発せられた他の要求の処理が完了されたことをアトミックに判別するステップと、
前記最近完了した要求より前に発せられた他の要求の処理が完了されたという判別に応答して、処理が完了したディスパッチされていない要求の各々をディスパッチするステップと、
を含む、請求項1に記載の方法。 - 前記共有リソースが、入力/出力アダプタのフレーム・バッファの少なくとも1つのスロットを含み、
前記ステップ(b)が、前記スロットを用いてデータを通信するステップを含み、
前記ステップ(e)が、前記通信されるデータの受信をクライアントに通知するステップを含む、請求項1に記載の方法。 - 前記コンピュータが、論理的に区画化されたコンピュータを含み、
前記入力/出力アダプタが、前記論理的に区画化されたコンピュータの区画間通信のために用いられる仮想ローカル・エリア・ネットワークに結合された仮想入力/出力アダプタである、請求項9に記載の方法。 - 前記共有リソースが、プロセッサ、ハードウェア・デバイス、入力/出力デバイス、ストレージ・デバイス、アダプタ、コントローラ、データベース、ファイルシステム、サービス、及びこれらのコンポーネントからなる群から選択される、請求項1に記載の方法。
- 共有リソースと、
前記共有リソースを使用する複数の要求を非同期的に発することが可能な複数のプロセスを実行するように構成された少なくとも1つのプロセッサと、
第1のプロセスにおいて、前記共有リソースを使用する現在の要求に固有の識別子をアトミックに割当てるステップと、前記固有の識別子を用いる前記現在の要求を準備することにより当該現在の要求の処理を完了させるステップと、前記現在の要求の処理が完了した後に、完了した要求のカウントをアトミックに増分させるステップと、前記現在の要求の処理が完了した後に、最近完了した要求より前に発せられた他の要求の処理が完了したかどうかをアトミックに判別するステップと、前記最近完了した要求より前に発せられた他の要求の処理が完了されたという判別に応答して、処理が完了したディスパッチされていない要求の各々をディスパッチするステップとを行うために、前記少なくとも1つのプロセッサ上で実行されるように構成されたプログラム・コードと、
を含み、前記固有の識別子は、前記複数のプロセスによって発せられた他の要求に対し前記現在の要求が受け取られる順番に基づいて当該現在の要求に割当てられる、装置。 - 請求項1ないし請求項11の何れか1項に記載の方法の各ステップをコンピュータに実行させるためのコンピュータ・プログラム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/422,193 US7047337B2 (en) | 2003-04-24 | 2003-04-24 | Concurrent access of shared resources utilizing tracking of request reception and completion order |
PCT/GB2004/001624 WO2004094863A2 (en) | 2003-04-24 | 2004-04-15 | Concurrent access of shared resources |
Publications (3)
Publication Number | Publication Date |
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JP2006524381A JP2006524381A (ja) | 2006-10-26 |
JP2006524381A5 JP2006524381A5 (ja) | 2007-06-07 |
JP4410795B2 true JP4410795B2 (ja) | 2010-02-03 |
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JP2006506127A Expired - Fee Related JP4410795B2 (ja) | 2003-04-24 | 2004-04-15 | 共有リソースの同時アクセス |
Country Status (8)
Country | Link |
---|---|
US (1) | US7047337B2 (ja) |
EP (1) | EP1620801A2 (ja) |
JP (1) | JP4410795B2 (ja) |
KR (1) | KR100843548B1 (ja) |
CN (1) | CN1774699B (ja) |
CA (1) | CA2522096C (ja) |
TW (1) | TWI265412B (ja) |
WO (1) | WO2004094863A2 (ja) |
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CN1774699A (zh) | 2006-05-17 |
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