Re: [Gems-users] Error with a CMP configuration

[Mike Marty <mikem@xxxxxxxxxxx>]

Which protocol?  Our CMP protocols included with the release are
MOESI_CMP_token, MSI_MOSI_CMP_directory, and MOESI_CMP_directory.  The
latter two are especially complex and you might have uncovered a bug.

--Mike


> hi,
>     I am using ruby to setup a CMP 32 processor system (16 CMP's) along
> with simics. I got the following error (only while running 32 threads, a
> configuration with lesser threads seems to run fine )
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:119: Possible Deadlock detected
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:119: Possible Deadlock detected
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:120: request is [CacheMsg: Address=[0xb93ae54, line
> 0xb93ae40] Type=ATOMIC ProgramCounter=[0xff242660, line 0xff242640]
> AccessMode=UserMode Size=1 Prefetch=No Version=0 Aborted=0 Time=894780000 ]
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:120: request is [CacheMsg: Address=[0xb93ae54, line
> 0xb93ae40] Type=ATOMIC ProgramCounter=[0xff242660, line 0xff242640]
> AccessMode=UserMode Size=1 Prefetch=No Version=0 Aborted=0 Time=894780000 ]
>
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:125: keys.size() is 1
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:126: *m_writeRequestTable_ptr is [ [0xb93ae40, line
> 0xb93ae40]=[CacheMsg: Address=[0xb93ae54, line 0xb93ae40] Type=ATOMIC
> ProgramCounter=[0xff242660, line 0xff242640] AccessMode=UserMode Size=1
> Prefetch=No Version=0 Aborted=0 Time=894780000 ] ]
> Warning: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:126: *m_writeRequestTable_ptr is [ [0xb93ae40, line
> 0xb93ae40]=[CacheMsg: Address=[0xb93ae54, line 0xb93ae40] Type=ATOMIC
> ProgramCounter=[0xff242660, line 0xff242640] AccessMode=UserMode Size=1
> Prefetch=No Version=0 Aborted=0 Time=894780000 ] ]
> Fatal Error: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:127: Aborting
> Fatal Error: in fn virtual void Sequencer::wakeup() in
> system/Sequencer.C:127: Aborting
> ***  Simics getting shaky, switching to 'safe' mode.
> ***  Simics (main thread) received an abort signal, probably an assertion.
> <Simics is running in 'safe' mode>
>
> My configuration is pretty standard , I am using PT_TO_POINT topology
> network. I havent made any changes in the ruby code . The program is a
> simple LU benchmark from the splash 2 suite.
> I am using simics 2.0.16 on host x86-linux.
> Can you give me some idea about this error so that I can try to fix it.
> salil
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