Re: [gem5-users] How to add shared nonblocking L3 cache in gem5?
Thanks Andreas. I have one more question regarding cache. Is it posible to create a system with multiple L2 caches each private to a specific core? On Wed, Aug 27, 2014 at 2:51 AM, Andreas Hansson andreas.hans...@arm.com wrote: Hi Prathap, You can easily create a subclass of the BaseCache and give it suitable parameters for an L3. This should be fairly straight forward and also easy to instantiate in the Python scripts (e.g. fs.py) Andreas From: Prathap Kolakkampadath via gem5-users gem5-users@gem5.org Reply-To: Prathap Kolakkampadath kvprat...@gmail.com, gem5 users mailing list gem5-users@gem5.org Date: Wednesday, 27 August 2014 05:25 To: gem5 users mailing list gem5-users@gem5.org Subject: [gem5-users] How to add shared nonblocking L3 cache in gem5? Hi Users, I am new to gem5 and I want to add nonblacking shared Last level cache(L3). I could see L3 cache options in Options.py with default values set. However there is no entry for L3 in Caches.py and CacheConfig.py. So extending Cache.py and CacheConfig.py would be enough to create L3 cache? Thanks, Prathap -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782 ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] How to add shared nonblocking L3 cache in gem5?
Hi Prathap, Definitely. The gem5 memory system let’s you build any tree-topology you like, even unbalanced (L2 for one core, and no L2 for another etc, 2 core for one L2 and a single core for the next). Just instantiate an L2 per core, connect it with a CoherentBus to the L1s of that core, and then use a CoherentBus on the memory-side of the L2 to “merge” the tree into the L3 (or use split L3’s as well). If you’ve got pydot installed gem5 generates a PDF/SVG showing the system layout to visually ensure you’ve accomplished what you intended. Andreas From: Prathap Kolakkampadath kvprat...@gmail.commailto:kvprat...@gmail.com Date: Thursday, 28 August 2014 17:47 To: Andreas Hansson andreas.hans...@arm.commailto:andreas.hans...@arm.com Cc: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: Re: [gem5-users] How to add shared nonblocking L3 cache in gem5? Thanks Andreas. I have one more question regarding cache. Is it posible to create a system with multiple L2 caches each private to a specific core? On Wed, Aug 27, 2014 at 2:51 AM, Andreas Hansson andreas.hans...@arm.commailto:andreas.hans...@arm.com wrote: Hi Prathap, You can easily create a subclass of the BaseCache and give it suitable parameters for an L3. This should be fairly straight forward and also easy to instantiate in the Python scripts (e.g. fs.py) Andreas From: Prathap Kolakkampadath via gem5-users gem5-users@gem5.orgmailto:gem5-users@gem5.org Reply-To: Prathap Kolakkampadath kvprat...@gmail.commailto:kvprat...@gmail.com, gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Date: Wednesday, 27 August 2014 05:25 To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: [gem5-users] How to add shared nonblocking L3 cache in gem5? Hi Users, I am new to gem5 and I want to add nonblacking shared Last level cache(L3). I could see L3 cache options in Options.py with default values set. However there is no entry for L3 in Caches.py and CacheConfig.py. So extending Cache.py and CacheConfig.py would be enough to create L3 cache? Thanks, Prathap -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782 -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] How to add shared nonblocking L3 cache in gem5?
In that case whether the MSHR's would be shared between 2 L2 Caches or can have separate MSHR for each L2 cache? Thanks. On Thu, Aug 28, 2014 at 11:52 AM, Andreas Hansson andreas.hans...@arm.com wrote: Hi Prathap, Definitely. The gem5 memory system let’s you build any tree-topology you like, even unbalanced (L2 for one core, and no L2 for another etc, 2 core for one L2 and a single core for the next). Just instantiate an L2 per core, connect it with a CoherentBus to the L1s of that core, and then use a CoherentBus on the memory-side of the L2 to “merge” the tree into the L3 (or use split L3’s as well). If you’ve got pydot installed gem5 generates a PDF/SVG showing the system layout to visually ensure you’ve accomplished what you intended. Andreas From: Prathap Kolakkampadath kvprat...@gmail.com Date: Thursday, 28 August 2014 17:47 To: Andreas Hansson andreas.hans...@arm.com Cc: gem5 users mailing list gem5-users@gem5.org Subject: Re: [gem5-users] How to add shared nonblocking L3 cache in gem5? Thanks Andreas. I have one more question regarding cache. Is it posible to create a system with multiple L2 caches each private to a specific core? On Wed, Aug 27, 2014 at 2:51 AM, Andreas Hansson andreas.hans...@arm.com wrote: Hi Prathap, You can easily create a subclass of the BaseCache and give it suitable parameters for an L3. This should be fairly straight forward and also easy to instantiate in the Python scripts (e.g. fs.py) Andreas From: Prathap Kolakkampadath via gem5-users gem5-users@gem5.org Reply-To: Prathap Kolakkampadath kvprat...@gmail.com, gem5 users mailing list gem5-users@gem5.org Date: Wednesday, 27 August 2014 05:25 To: gem5 users mailing list gem5-users@gem5.org Subject: [gem5-users] How to add shared nonblocking L3 cache in gem5? Hi Users, I am new to gem5 and I want to add nonblacking shared Last level cache(L3). I could see L3 cache options in Options.py with default values set. However there is no entry for L3 in Caches.py and CacheConfig.py. So extending Cache.py and CacheConfig.py would be enough to create L3 cache? Thanks, Prathap -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782 -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782 ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
Re: [gem5-users] How to add shared nonblocking L3 cache in gem5?
Hi Prathap, You can easily create a subclass of the BaseCache and give it suitable parameters for an L3. This should be fairly straight forward and also easy to instantiate in the Python scripts (e.g. fs.py) Andreas From: Prathap Kolakkampadath via gem5-users gem5-users@gem5.orgmailto:gem5-users@gem5.org Reply-To: Prathap Kolakkampadath kvprat...@gmail.commailto:kvprat...@gmail.com, gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Date: Wednesday, 27 August 2014 05:25 To: gem5 users mailing list gem5-users@gem5.orgmailto:gem5-users@gem5.org Subject: [gem5-users] How to add shared nonblocking L3 cache in gem5? Hi Users, I am new to gem5 and I want to add nonblacking shared Last level cache(L3). I could see L3 cache options in Options.py with default values set. However there is no entry for L3 in Caches.py and CacheConfig.py. So extending Cache.py and CacheConfig.py would be enough to create L3 cache? Thanks, Prathap -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England Wales, Company No: 2548782___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
[gem5-users] How to add shared nonblocking L3 cache in gem5?
Hi Users, I am new to gem5 and I want to add nonblacking shared Last level cache(L3). I could see L3 cache options in Options.py with default values set. However there is no entry for L3 in Caches.py and CacheConfig.py. So extending Cache.py and CacheConfig.py would be enough to create L3 cache? Thanks, Prathap ___ gem5-users mailing list gem5-users@gem5.org http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
