# US 2017/0285985 A1 · Providing service address space for diagnostics collection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285985 A1 - Document ID: US20170285985A1 - Status: Published application - Kind: A1 - Application number: 15/630,669 - Filed: 2017-06-22 - Published: 2017-10-05 - Earliest claimed: 2012-08-10 - Assignees: International Business Machines Corporation - Applicants: International Business Machines Corporation - Inventors: David J. Harman; Neil W. Leedham; Kim P. Walsh; Andrew Wright - Web page: https://patentgrep.com/patent/US20170285985A1 ## CPC - G06F 3/0619: {in relation to data integrity, e.g. data losses, bit errors} - G06F 3/065: {Replication mechanisms} - G06F 3/0659: {Command handling arrangements, e.g. command buffers, queues, command scheduling} - G06F 3/067: {Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]} - G06F 9/3867: {using instruction pipelines} - G06F 11/0724: {in a multiprocessor or a multi-core unit (multiprocessors per se G06F15/80)} - G06F 11/0778: {Dumping, i.e. gathering error/state information after a fault for later diagnosis} - G06F 11/3476: {Data logging (G06F11/14, G06F11/2205 take precedence)} - G06F 12/063: {for I/O modules, e.g. memory mapped I/O (I/O protocol G06F13/42)} - G06F 11/34: Recording or statistical evaluation of computer activity, e.g. of down time, of input/output operation {; Recording or statistical evaluation of user activity, e.g. usability assessment} - G06F 11/3648: {using additional hardware} - G06F 12/0615: {Address space extension} - G06F 12/0842: for multiprocessing or multitasking - G06F 2212/1032: Reliability improvement, data loss prevention, degraded operation etc - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A method and technique are provided for providing a service address space. The method includes providing a service co-processor with a service address space attached to a main processor. The main processor is provided with a main address space. Instructions that modify the main address space are intercepted, storage delta packets are generated based on intercepted instructions, and the storage delta packets are sent to a service co-processor maintaining a service address space. ## Claims ### Claim 1 A method for providing service address space, comprising: providing a main processor having a main address space; intercepting instructions that modify the main address space; generating storage delta packets based on intercepted instructions; and sending the storage delta packets to a service co-processor maintaining a service address space. ### Claim 2 (depends on 1) The method of claim 1, further comprising delegating collection of diagnostic data to the service co-processor ### Claim 3 (depends on 1) The method of claim 1, further comprising sending a collection command from the main processor to the service co-processor for collection of data from the service address space. ### Claim 4 (depends on 1) The method of claim 1, further comprising, at the main processor: monitoring for instructions that modify the main address space; and sending the storage delta packets on an instruction pipe to the service co-processor. ### Claim 5 (depends on 1) The method of claim 1, further comprising, at the service co-processor: monitoring an instruction pipe for the storage delta packets; and applying the storage delta packets to the service address space. ### Claim 6 (depends on 1) The method of claim 1, further comprising: queuing the storage delta packets in an instruction pipe from the main processor to the service co-processor such that the service co-processor runs behind the main processor; and wherein the service address space contains a historical copy of the main address space. ### Claim 7 (depends on 1) The method of claim 1, wherein at least one of the storage delta packets includes: a storage address to be updated; a new value of storage to be updated; and associated information including a system clock value. ### Claim 8 (depends on 3) The method of claim 3, further comprising prioritizing the collection command over the storage delta packets. ### Claim 9 (depends on 3) The method of claim 3, further comprising receiving the collection command over a command pipe from the main processor. ### Claim 10 (depends on 3) The method of claim 3, further comprising instructing the collection of diagnostic data at a particular system clock value. ### Claim 11 (depends on 3) The method of claim 3, further comprising: receiving the collection command with a given system clock value; and actioning the collection command at the service co-processor when a storage delta packet pertaining to the clock value is processed. ### Claim 12 (depends on 3) The method of claim 3, wherein the collection of diagnostic data includes one or more of the group of: a system dump, a system trace, and a collection of monitoring and statistics data. ### Claim 13 (depends on 3) The method of claim 3, further comprising after carrying out the collection of diagnostic data, the service co-processor resetting the service address space by copying the contents of the main address space to the service address space and re-starting the process of mirroring all storage updates to the service co-processor. ### Claim 14 (depends on 3) The method of claim 3, further comprising enabling direct access to service address registers of the service co-processor for analysis. ### Claim 15 A method for providing service address space, comprising: providing a service co-processor attached to a main processor, wherein the service co-processor has a service address space, wherein the main processor is provided with a main address space, wherein the service co-processor creates and maintains an independent copy of the main address space in the form of the service address space; updating the service address space by receiving storage delta packets from the main processor and applying the storage delta packets to the service address space; and performing diagnostic services by the service co-processor based on command packets received from the main processor. ### Claim 16 (depends on 15) The method of claim 15, further comprising delegating, by a service delegation component of the main processor, collection of diagnostic data to the co-processor. ### Claim 17 (depends on 15) The method of claim 15, further comprising prioritizing, by the service co-processor, the command packets over the storage delta packets. ### Claim 18 (depends on 15) The method of claim 15, further comprising performing, by the service co-processor, a service function at a particular value of a system clock. ### Claim 19 (depends on 15) The method of claim 15, further comprising initiating a service function baaed on a particular value of a system clock indicated in a respective command packet. ### Claim 20 (depends on 15) The method of claim 15, further comprising initiating a delayed service function in response to processing a storage delta packet having a time stamp corresponding to a particular system clock value.