Turn on the ProtocolTrace, RubyGenerated, RubySlicc debug-flags and begin
tracing at few cycles before the deadlock occurs (3352000000000 should be fine
for ur case). You will get a clear idea of why the read request could not
manage to get service from the memory system
-Dibakar
On 08/09/12, jinsong wrote:
>
> BLOCKQUOTE { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; MARGIN-LEFT: 2em } OL {
> MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } UL { MARGIN-TOP: 0px; MARGIN-BOTTOM:
> 0px } P { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } BODY { LINE-HEIGHT: 1.5;
> FONT-FAMILY: 微软雅黑; COLOR: #000000; FONT-SIZE: 10.5pt }
>
> Hi All,
> I am running PARSEC on gem5 in ALPHA FS mode. With the following commands, a
> deadlock problem occurred:
> ###gem5 command line options###
> ~/gem5/build/ALPHA_MOESI_hammer/gem5.opt configs/example/ruby_fs.py
> --cpu-type=timing -n 16 --clock='1GHz' --l1i_size=32kB --l1d_size=32kB
> --l2_size=16MB --num-l2caches=16 --num-dirs=16 --cacheline_size=64 --caches
> --ruby --topology=Mesh --garnet-network=fixed --mesh-rows=4
> --kernel=vmlinux_2.6.27-gcc_4.3.4
> --script=~/gem5/configs/boot/blackscholes-ckpts.rcS
>
> ###below is the running results:###
> ...
> warn: Prefetch instructions in Alpha do not do anything
> warn: Prefetch instructions in Alpha do not do anything
> warn: Prefetch instructions in Alpha do not do anything
> hack: be nice to actually delete the event here
> info: Entering event queue @ 3352057344000. Starting simulation...
> Writing checkpoint
> info: Entering event queue @ 3352057347000. Starting simulation...
> info: Entering event queue @ 3352057347000. Starting simulation...
> panic: Possible Deadlock detected. Aborting!
> version: 0 request.paddr: 0x[0x6d48, line 0x6d40] m_readRequestTable: 1
> current time: 3352557347 issue_time: 3352057347 difference: 500000
> @ cycle 3352557347000
> [wakeup:build/ALPHA_MOESI_hammer/mem/ruby/system/Sequencer.cc, line 108]
> Memory Usage: 1325856 KBytes
> Program aborted at cycle 3352557347000
> Aborted
>
>
> So how should I fix this problem? Any help greatly appreciated!
>
> Best regards,
> Song Jin
>
> ------------------------------------------------------------------------
> Song Jin, Ph. D.
> Department of Electronic and Communication Engineering
> School of Electrical and Electronic Engineering
> North China Electric Power University, P. R. China
> Web: http://www.ncepu.edu.cn
> ------------------------------------------------------------------------
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