{"id":1942,"date":"2017-01-13T03:51:57","date_gmt":"2017-01-13T03:51:57","guid":{"rendered":"http:\/\/support.plunify.com\/en\/?p=1942"},"modified":"2018-03-27T02:34:12","modified_gmt":"2018-03-27T02:34:12","slug":"automatic-placement","status":"publish","type":"post","link":"https:\/\/support.plunify.com\/en\/2017\/01\/13\/automatic-placement\/","title":{"rendered":"Automatic placement adjustments in Quartus"},"content":{"rendered":"

While LogicLock assignments enable users to constrain their Quartus designs' placement locations as part of floor-planning, at Plunify we've always been thinking about intelligently\u00a0doing targeted LogicLock adjustments to improve design performance. This idea has now been implemented into a new recipe in InTime<\/a> 1.6.0 called Auto Placement<\/em>.<\/p>\n

The new Auto Placement<\/em>\u00a0recipe performs\u00a0automatic placement adjustments to improve timing. InTime first analyses the\u00a0locations of failing timing paths, and re-locates them based on what the tool learns about the design's characteristics, without changing any source code.<\/p>\n

The figure below shows the chip view of the implemented design, before and after\u00a0Auto Placement<\/em>:<\/p>\n

\"Intime_autopl_before_after_chipview_result\"<\/p>\n

Noticeable placement differences
\nprior to (left) and after (right) running Auto Placement<\/em><\/p>\n

Intrigued by what you are seeing? Here is how to use Auto Placement<\/em>\u00a0for a Quartus-II or Quartus Prime Std Edition project:<\/p>\n

    \n
  1. Open your project in InTime.<\/li>\n
  2. From the Recipe dropdown, click and select the Auto Placement<\/em>\u00a0recipe.\"Intime_autopl_recipe\"<\/li>\n
  3. Specify the number of different results you want in the \"Runs per Round\" flow property (10 in this example).
    \n\"property_runs_per_round\"<\/li>\n
  4. Click \"Start Recipe\" to start running.<\/li>\n<\/ol>\n

    Here is a more detailed example of a design ran using\u00a0Auto Placement<\/em>.<\/p>\n

    \"Intime_autopl_tns_result\"<\/p>\n

    The design was first compiled using the\u00a0InTime Default<\/em> recipe, followed by the\u00a0Auto Placement<\/em> recipe. This is one possible\u00a0recipe combination\u00a0where\u00a0Auto Placement<\/em>\u00a0can be\u00a0used with\u00a0other\u00a0recipes. The first round runs\u00a0InTime Default<\/em>\u00a0to find the optimised set of compiler settings for timing performance while the second round further optimises timing using Auto Placement<\/em>\u00a0based on the optimal compiler settings found in the first round. Notice that the Total Negative Slack(TNS) improves by 8.904ns from the best first round's TNS of -17.369ns, to an overall best of -8.465ns.<\/p>\n

    As randomness is involved, not all results generated via the Auto Placement<\/em> recipe will be good, but it is a painless approach with no impact on functionality -- certainly something worth\u00a0trying<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

    While LogicLock assignments enable users to constrain their Quartus designs’ placement locations as part of floor-planning, at Plunify we’ve always been thinking about intelligently\u00a0doing targeted LogicLock adjustments to improve design performance. This idea has now been implemented into a new recipe in InTime 1.6.0 called Auto Placement. The new Auto Placement\u00a0recipe performs\u00a0automatic placement adjustments to […]<\/p>\n","protected":false},"author":13,"featured_media":1990,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"_links_to":"","_links_to_target":""},"categories":[206],"tags":[101,212,211,214,213],"yoast_head":"\nAutomatic placement adjustments in Quartus - Plunify Blog & Support<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/support.plunify.com\/en\/2017\/01\/13\/automatic-placement\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Automatic placement adjustments in Quartus - Plunify Blog & Support\" \/>\n<meta property=\"og:description\" content=\"While LogicLock assignments enable users to constrain their Quartus designs' placement locations as part of floor-planning, at Plunify we've always been thinking about intelligently\u00a0doing targeted LogicLock adjustments to improve design performance. This idea has now been implemented into a new recipe in InTime 1.6.0 called Auto Placement. 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