Hi guys, If we want to stick to a x8 4Gb part, then perhaps K4A4G085WD-BCRC would make sense?
Andreas From: Majid Jalili <majid...@gmail.com<mailto:majid...@gmail.com>> Reply-To: gem5 users mailing list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>> Date: Thursday, 12 March 2015 07:17 To: omar naji <naji_o...@hotmail.com<mailto:naji_o...@hotmail.com>> Cc: gem5 users mailing list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>> Subject: Re: [gem5-users] Negative value for system.mem_ctrls_1.actEnergy Dear Omar and Andreas, Yes you are right. I changed the --mem-type to DDR3_1600_x64 and the problem was solved. The value for IDDs in DRAMCtrl.py are set to: for DDR3_1600_x64 IDD0 = '75mA' and IDD3N = '57mA' for DDR4_2400_x64, IDD0 = '64mA' and IDD3N = '67mA' It seems that IDDs for DDR4_2400_x64 need to be revised. Regards On Wed, Mar 11, 2015 at 9:20 PM, omar naji <naji_o...@hotmail.com<mailto:naji_o...@hotmail.com>> wrote: Hi Majid, The problem is that the IDD0 value is smaller than the active background current IDD3n as defined in the used datasheet. This leads to a negative value in the activation energy. I suppose this is a bug in the used DDR4 datasheet. I would propose that you set the latency and current parameters of DDR4 using another datasheet. Regards, Omar > Date: Wed, 11 Mar 2015 15:37:25 +0000 > From: andreas.hans...@arm.com<mailto:andreas.hans...@arm.com> > To: majid...@gmail.com<mailto:majid...@gmail.com>; > gem5-users@gem5.org<mailto:gem5-users@gem5.org> > Subject: Re: [gem5-users] Negative value for system.mem_ctrls_1.actEnergy > > Hi Majid, > > First I would suggest to check the IDD values. Perhaps there is a typo > somewhere, or even an inconsistency in the actual data sheet. > > Second it would be good to know if you're doing any form of check pointing. > If so there could be something not getting reset properly. > > Andreas > > ----- > On Mar 11, 2015 at 12:44 PM, Majid Jalili > <majid...@gmail.com<mailto:majid...@gmail.com>> wrote: > > > Dears, > > I run most recent version of gem5 without any modification to source code > and with following command in SE mode: > > ./build/ALPHA/gem5.opt ./configs/example/cmp.py -b > lbm,lbm,lbm,lbm,lbm,lbm,lbm,lbm --mem-type=DDR4_2400_x64 --mem-size=16GB -n > 8 --caches --l2cache --cpu-type=detailed --l2_size=4MB --cacheline_size=64 > --l1i_size=64kB --l1d_size=64kB -I 1000000 > > then in the stat file I see weired result for activation energy: > system.mem_ctrls_1.actEnergy -1076645.169600 > # Energy for activate commands per rank (pJ) > > I am wondering if someone could help me with this problem. > > > Regards > Majid > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org<mailto:gem5-users@gem5.org> > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users -- 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
