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
