Cadence® system design and verification solutions, integrated under our Verification Suite, provide the simulation, acceleration, emulation, and management capabilities.
Verification Suite Related Products A-Z
Cadence® digital design and signoff solutions provide a fast path to design closure and better predictability, helping you meet your power, performance, and area (PPA) targets.
Full-Flow Digital Solution Related Products A-Z
Cadence® custom, analog, and RF design solutions can help you save time by automating many routine tasks, from block-level and mixed-signal simulation to routing and library characterization.
Overview Related Products A-Z
Driving efficiency and accuracy in advanced packaging, system planning, and multi-fabric interoperability, Cadence® package implementation products deliver the automation and accuracy.
Cadence® PCB design solutions enable shorter, more predictable design cycles with greater integration of component design and system-level simulation for a constraint-driven flow.
An open IP platform for you to customize your app-driven SoC design.
Comprehensive solutions and methodologies.
Helping you meet your broader business goals.
A global customer support infrastructure with around-the-clock help.
More Support Log In
24/7 Support - Cadence Online Support
Locate the latest software updates, service request, technical documentation, solutions and more in your personalized environment.
Cadence offers various software services for download. This page describes our offerings, including the Allegro FREE Physical Viewer.
The Cadence Academic Network helps build strong relationships between academia and industry, and promotes the proliferation of leading-edge technologies and methodologies at universities renowned for their engineering and design excellence.
Participate in CDNLive
A huge knowledge exchange platform for academia to network with industry. We are looking for academic speakers to talk about their research to the industry attendees at the Academic Track at CDNLive EMEA and Silicon Valley.
Come & Meet Us @ Events
A huge knowledge exchange platform for academia. We are looking for academic speakers to talk about their research to industry attendees.
Americas University Software Program
Join the 250+ qualified Americas member universities who have already incorporated Cadence EDA software into their classrooms and academic research projects.
EMEA University Software Program
In EMEA, Cadence works with EUROPRACTICE to ensure cost-effective availability of our extensive electronic design automation (EDA) tools for non-commercial activities.
Apply Now For Jobs
If you are a recent college graduate or a student looking for internship. Visit our exclusive job search page for interns and recent college graduate jobs.
Cadence is a Great Place to do great work
Learn more about our internship program and visit our careers page to do meaningful work and make a great impact.
Get the most out of your investment in Cadence technologies through a wide range of training offerings.
Overview All Courses Asia Pacific EMEANorth America
Instructor-led training [ILT] are live classes that are offered in our state-of-the-art classrooms at our worldwide training centers, at your site, or as a Virtual classroom.
Online Training is delivered over the web to let you proceed at your own pace, anytime and anywhere.
Exchange ideas, news, technical information, and best practices.
The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information.
It's not all about the technology. Here we exchange ideas on the Cadence Academic Network and other subjects of general interest.
Cadence is a leading provider of system design tools, software, IP, and services.
I am running Ocean script from the unix terminal. I have several for loops inside so that I can perform multiple runs. If i have a loop that changes some variables (say from 1 to 1000), then after 300 runs, the script stops with "St9bad_alloc" error. How should I debug this?
You probably should take note of the Forum Guidelines before posting, because otherwise I can only give a very general suggestion.
It might be that you're running out of memory due to loading lots of simulation results - but I have no way of telling without seeing your OCEAN script and without knowing the version you're using. If you check the process to see if it's near the 32 bit limit (a bit less than 4Gbytes) in IC5141 - could be run 64 bit if in IC614 or later. It may be the problem goes away with a later hotfix or a later version - who knows? As I said, I'm having to guess.
Perhaps if you provide this somebody else can answer (I'm away for a couple of weeks).
In reply to Andrew Beckett:
Hi Andrew & Team,
As per your suggestion, I am attaching here more details about my cadence version and the OCEAN script that I am using. I have also listed my problem below again. Please let me know if I can provide any more details that would help debug this issue.
VERSION INFO: IC5141ISR0624
SubVersion: 220.127.116.110.6.143 (32-bit address)
PROBLEM: When i run this script, it stops with the following error after around 305 runs. And depending on how many equations I compute, it stops at different runs. The more the equations, it stops earlier.
*Error* Exception: St9bad_alloc - nil
*Error* load: error while loading file - "kumar.ocn"
envSetVal("spectre.envOpts" "controlMode" 'string "batch")
designFile = "**/netlist"
resultsDirect = "**/spectre/schematic"
oceanScrptFile = "**/kumar.ocn"
dataFile = "**/kumar.dat"
code_length = 500
loop_count = code_length
step = 0
simulator( 'spectre )
design( designFile )
resultsDir( resultsDirect )
modelFile('("Model File Path Defined Here"))
for(NOS 1 code_length
RIN = 500 - step
desVar( "R1" 255)
desVar( "R2" 255)
desVar( "R3" 63)
desVar( "R4" 255)
desVar( "RINS" RIN)
** I HAVE FEW MORE VARIABLES THAT ARE SET TO CONSTANT VALUE **
step = step + 1
loop_count = loop_count - 1
analysis('sp ?ports list("/PORT0" "/PORT1") ?start "10M" ?stop "100M"
?dec "40" ?values list("50M") ?donoise "yes" ?oprobe "/PORT1"
?iprobe "/PORT0" )
analysis('dc ?saveOppoint t )
option( 'vabstol "1e-8" 'reltol "1e-5")
temp( 27 )
**MY EQUATIONS **
Gain_10M = value(db10(gt(sp(1 1 ?result "sp") sp(1 2 ?result "sp") sp(2 1 ?result "sp") sp(2 2 ?result "sp"))) 10000000)
** I HAVE FEW MORE EQUATIONS AT DIFFERENT FREQUENCY **
dfKey = outfile(dataFile "a")
fprintf(dfKey "| %-5.3d | %-5.3d | %-5.3d | %-5.3d | %-5.3d | %-5.3f | %-5.3f | %-5.3f | %-5.3f |\n"
RINS R1 R2 R3 R4 Gain_10M Gain_15M Gain_20M Gain_30M)
Regards & Thanks