Atomic mode is the simplest CPU you can get in gem5. Bbench takes roughly 8 hours to complete in this mode, of which 1-2 hours are needed for booting. If you use the command on the bbench wiki page, this cpu is used by default. If you specify "--cpu-type arm_detailed" on your command line (check the help output for the available cpu types, I used arm_detailed as an example) the simulation takes 3.5 days (on my machine that is). You can shave off a day by simulating the part upto the boot-up in simple cpu mode, checkpointing it and restoring from that checkpoint using the arm_detailed CPU.
On Fri, Apr 20, 2012 at 8:13 PM, Anthony Gutierrez <[email protected]>wrote: > The instructions at http://gem5.org/BBench-gem5 assumes the reader > already has some familiarity with gem5. In gem5 there are options for > running certain portions of a benchmark using the fast atomic mode, then > running the region of interest using the detailed mode. Search the wiki > and/or mailing list for topics concerning fast-forwarding and checkpointing. > > -Tony > > > On Fri, Apr 20, 2012 at 10:25 AM, Ira Ray Jenkins <[email protected] > > wrote: > >> I'm not totally familiar with gem5, so I'm not sure exactly what you >> mean with "boot in atomic" and "run with arm_detailed"? I just >> followed the directions at: http://www.m5sim.org/BBench-gem5 >> >> >> >> On Fri, Apr 20, 2012 at 10:17 AM, Andreas Hansson >> <[email protected]> wrote: >> > If you boot in atomic and then run Bbench with arm_detailed I would >> envision roughly three days. >> > >> > You can have a look at the terminal and framebuffer output. >> > >> > Andreas >> > >> > -----Original Message----- >> > From: [email protected] [mailto:[email protected]] >> On Behalf Of Ira Ray Jenkins >> > Sent: 20 April 2012 13:36 >> > To: [email protected] >> > Subject: [gem5-users] BBench running time >> > >> > I ran the BBench benchmark as described online for about 8 hours. The >> > only output I got was "Warn xyz instruction not implemented", is this >> > normal? How long does this benchmark take to run? I know it is >> > dependent on the host machine, but I'm just looking for a ball-park? >> > Is 8 hours enough, did I do something wrong? >> > _______________________________________________ >> > gem5-users mailing list >> > [email protected] >> > 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. >> > >> > _______________________________________________ >> > gem5-users mailing list >> > [email protected] >> > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> _______________________________________________ >> gem5-users mailing list >> [email protected] >> http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >> > > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users >
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