Re: [gem5-users] Uncachable Load

Andreas Hansson Sat, 27 Jun 2015 08:37:50 -0700

Hi Shamik,

That's the one.

Andreas

From: Shamik Saha <shmk_s...@yahoo.co.in>
Reply-To: Shamik Saha , gem5 users mailing list <shmk_s...@yahoo.co.in>
Date: 6/27/15, 11:39:09 AM GMT+2
To: gem5-users@gem5.org <gem5-users@gem5.org>
Subject: Re: [gem5-users] Uncachable Load

Hi,

hg clone http://repo.gem5.org/gem5

Is this the one you are talking about?

Regards,

Shamik

On Saturday, 27 June 2015 2:38 AM, Shamik Saha <shmk_s...@yahoo.co.in> wrote:

Hi,

I have been trying to simulate an ARM platform on gem5 using ASIM benchmarks.

My command line is very simple and as follows:

command line: /home/A02047272/SmartCharge/gem5/build/ARM/gem5.opt --stats-file=adobe.o3stats.txt /home/A02047272/SmartCharge/gem5/configs/example/fs.py -b adobe -n 4 --cpu-type=detailed --caches --l2cache --kernel=vmlinux.smp.ics.arm.asimbench.2.6.35 --disk-image=ARMv7a-ICS-Android.SMP.Asimbench-v3.img --checkpoint-dir=/home/A02047272/SmartCharge/gem5/configs/boot/adobe --maxinsts=999999999

And I am getting the following error message:

panic: Uncachable load [sn:3579b98] PC (0xc016b5c0=>0xc016b5c4).(0=>1)

@ cycle 35895648

[invoke:build/ARM/arch/generic/debugfaults.hh, line 94]

Memory Usage: 35895648 KBytes

Program aborted at cycle 869721495000

Aborted

The problem stems from the following snippet of code at /home/A02047272/SmartCharge/gem5/src/cpu/o3/lsq_unit.hh

if (req->isUncacheable() &&

(load_idx != loadHead || !load_inst->isAtCommit())) {

iewStage->rescheduleMemInst(load_inst);

++lsqRescheduledLoads;

DPRINTF(LSQUnit, "Uncachable load [sn:%lli] PC %s\n",

load_inst->seqNum, load_inst->pcState());

// Must delete request now that it wasn't handed off to

// memory. This is quite ugly. @todo: Figure out the proper

// place to really handle request deletes.

delete req;

if (TheISA::HasUnalignedMemAcc && sreqLow) {

delete sreqLow;

delete sreqHigh;

}

return new GenericISA::M5PanicFault(

"Uncachable load [sn:%llx] PC %s\n",

load_inst->seqNum, load_inst->pcState());

}

Is there a fix for this?

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