This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

RTL synthesis fault

nokta over 4 years ago

Dear All,
While I am trying to synthesis from Verilog file with Genus, I find some faults. After I set my files, rest of my Tcl file is like at below.

elaborate

# Apply Constraints
set clock [define_clock -period ${delay} -name ${clkpin} [clock_ports]]
external_delay -input 0 -clock ${clkpin} [find / -port ports_in/*]
external_delay -output 0 -clock ${clkpin} [find / -port ports_out/*]
check_design -all

#Synthesis
synthesize -to_generic -eff medium
synthesize -to_mapped -eff medium -no_incr
synthesize -to_mapped -eff medium -incr
synthesize -to_mapped
#syn_gen
#syn_map
#syn_opt

#Reports
report timing > ./rep/${runDesign}_${delay}mHz_timing.rep
report gates > ./rep/${runDesign}_${delay}mHz_cell.rep
report power > ./rep/${runDesign}_${delay}mHz_power.rep
report area > ./rep/${runDesign}_${delay}mHz_area.rep

gui_show

When I use "synthesize ....." options under "#Synthesis", end of my log file as like below.

Info    : Pre-processed datapath logic. [DPOPT-6]
        : No pre-processing optimizations applied to datapath logic in 'pbs_gen_n_6'.
Info    : Optimizing datapath logic. [DPOPT-1]
        : Optimizing datapath logic in 'pbs_gen_n_6'.
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_70'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_70'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_69'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_69'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_68'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_68'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Done optimizing datapath logic. [DPOPT-2]
        : Done optimizing datapath logic in 'pbs_gen_n_6'.
      Removing temporary intermediate hierarchies under pbs_gen_n_6
Sourcing './.pbs_server.xx_177790/pbs_gen_n_6.etf' (Wed Jan 16 18:58:25 +03 2019)...
rdbfname wdbfname effort physical pas design assembly_index
./.pbs_server.xx_177790/pbs_gen_n_6.db ./.pbs_server.xx_177790/pbs_gen_n_6_post.db medium 0 0 /designs/pbs_gen_n_6 -1

Segmentation Fault accessing address ffffffffffffc6a0.

Fatal internal error, code 11 (Segmentation fault)

Dumping stack trace (tid:7fbce9466400/main thread).

Operating System: linux
Product Version:
Build Date:
Executable: /cds/GENUS171/tools.lnx86/synth/bin/64bit/genus
Startup Options: -legacy_ui
Current Directory: /home/user/work/genus/
Stack trace:
Segmentation fault (core dumped)

When I use "syn_gen ....." options, end of my log file as like below.

Info    : Pre-processed datapath logic. [DPOPT-6]
        : No pre-processing optimizations applied to datapath logic in 'pbs_gen_n_6'.
Info    : Optimizing datapath logic. [DPOPT-1]
        : Optimizing datapath logic in 'pbs_gen_n_6'.
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_70'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_70'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_69'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_69'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region_68'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region_68'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Implementing datapath configurations. [DPOPT-3]
        : Implementing datapath configurations for 'CDN_DP_region'
Info    : Done implementing datapath configurations. [DPOPT-4]
        : Selected 'very_fast' configuration 4 for module 'CDN_DP_region'.
          Optimizations applied to 'very_fast' configuration:
            rewriting(0), factoring(0), sharing(0), cmultcse(0), downsizing(0), speculation(0)
Info    : Done optimizing datapath logic. [DPOPT-2]
        : Done optimizing datapath logic in 'pbs_gen_n_6'.
      Removing temporary intermediate hierarchies under pbs_gen_n_6
Sourcing './.pbs_server.xxx_181030/pbs_gen_n_6.etf' (Wed Jan 16 19:44:50 +03 2019)...
rdbfname wdbfname effort physical pas design assembly_index
./.pbs_server.xxx_181030/pbs_gen_n_6.db ./.pbs_server.xxx_181030/pbs_gen_n_6_post.db medium 0 0 /designs/pbs_gen_n_6 -1
Illegal instruction (core dumped)

They are pretty much same but I just want to share. If you have any idea about it, it will be so helpfull for me.

Rameen over 1 year ago

occur same issue? Did you find any solution or reason of this error?
Cancel
Up 0 Down

Cancel
nokta over 1 year ago in reply to Rameen

It is been a long time and I cannot remember exactly but I think its reason was the lack of RAM. Are you trying to synthesis a big design and can you check the RAM while synthesis?

And can you share your RAM size and the address given at the line below in the log file?

Segmentation Fault accessing address XYZ
Cancel
Up 0 Down

Cancel
Rameen over 1 year ago in reply to nokta

yes, I am trying to synthesize big design and the RAM Size of our server is 256GB.Address is 38
Cancel
Up 0 Down

Cancel
Rameen over 1 year ago in reply to nokta

By the way its not a big design like HPC, You can say that its a small design. So 256GB is much more enough for synthesize
Cancel
Up 0 Down

Cancel
Dimo M over 1 year ago in reply to Rameen

Hi Rameen,
debugging a crash via the forum will be very hard. If possible, please contact customer support and report the issue.

You can check the following article for some hints on crashes in Genus: What to do on observing a crash, hang, or huge runtime in Genus?

The log snippet hints to a problem related to PBS, so you can try to set "set_attribute partition_based_synthesis false" as a workaround.
This is not a recommended setting, but it might help you to avoid the crash for the time being until your issue is resolved by the support team.

Btw, I moved the thread to Logic Design.

Dimo
Cancel
Up 0 Down

Cancel
Rameen over 1 year ago in reply to Dimo M

Thank You so much for this article but it doesn't work too.
Cancel
Up 0 Down

Cancel

Stats

RTL synthesis fault

Community Guidelines