芯片后端之 PT 使用 report_timing 产生报告如何阅读

今天，就PT常用的命令，做一个介绍，希望对大家以后的工作，起到帮助作用。

在PrimeTime中，使用report_timing -delay max命令生成此报告。switch -delay max表示定时报告用于设置(这是默认值)。

首先，我们整体看一下通过report_timing 运行之后，报告产生的整体样式。

pt_shell> report_timing -from start_point -to end_point -delay_type max

  Startpoint: FF1 (rising edge-triggered flip-flop clocked by Clk)Endpoint: FF2 (rising edge-triggered flip-flop clocked by Clk)Path Group: ClkPath Type: maxPoint                                    Incr       Path-----------------------------------------------------------clock Clk (rise edge)                    0.00       0.00clock network delay (propagated)         1.10 *     1.10FF1/CLK (fdef1a15)                       0.00       1.10 rFF1/Q (fdef1a15)                         0.50 *     1.60 rU2/Y  (buf1a27)                          0.11 *     1.71 rU3/Y  (buf1a27)                          0.11 *     1.82 rFF2/D (fdef1a15)                         0.05 *     1.87 rdata arrival time                                   1.87clock Clk (rise edge)                    4.00       4.00clock network delay (propagated)         1.00 *     5.00FF2/CLK (fdef1a15)                                  5.00 rlibrary setup time                      -0.21 *     4.79data required time                                  4.79------------------------------------------------------------data required time                                  4.79data arrival time                                  -1.87------------------------------------------------------------slack (MET)                                         2.92

一 Header部分

  Startpoint: FF1 (rising edge-triggered flip-flop clocked by Clk)Endpoint: FF2 (rising edge-triggered flip-flop clocked by Clk)Path Group: ClkPath Type: max

二 Data arrival部分

  Point                                    Incr       Path-----------------------------------------------------------clock Clk (rise edge)                    0.00       0.00clock network delay (propagated)         1.10 *     1.10FF1/CLK (fdef1a15)                       0.00       1.10 rFF1/Q (fdef1a15)                         0.50 *     1.60 rU2/Y  (buf1a27)                          0.11 *     1.71 rU3/Y  (buf1a27)                          0.11 *     1.82 rFF2/D (fdef1a15)                         0.05 *     1.87 rdata arrival time                                   1.87

三 Data required

  clock Clk (rise edge)                    4.00       4.00clock network delay (propagated)         1.00 *     5.00FF2/CLK (fdef1a15)                                  5.00 rlibrary setup time                      -0.21 *     4.79data required time                                  4.79

 

 四  Slack

  ------------------------------------------------------------data required time                                  4.79data arrival time                                  -1.87------------------------------------------------------------slack (MET)                                         2.92

********************************************************************************************************

pt_shell> report_timing -from start_point -to end_point -delay_type min

pt_shell> report_analysis_coverage