90 lines
2.2 KiB
Markdown
90 lines
2.2 KiB
Markdown
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# VCS编译加速：三步编译和分块编译
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验证问题：有不同穿层信号时，模块的partition库能否reuse?
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结论：**当穿层信号变化时，受影响的模块不能reuse**。
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## 快速开始
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### 第一次编译
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```bash
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make all GENLIB=1
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```
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### 第二次编译
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```bash
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make all GENLIB=0
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```
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## 运行结果
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```
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Top Level Modules:
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testbench
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TimeScale is 1 ns / 1 ps
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Note-[PC_SHARED] Reusing shared partition
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Reusing partition '_vcs_pc_package_' from shared library './partitionlib'.
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Note-[PC_SHARED] Reusing shared partition
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Reusing partition 'uvm_pkg' from shared library './partitionlib'.
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Note-[PC_SHARED] Reusing shared partition
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Reusing partition 'counter_a' from shared library './partitionlib'.
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Warning-[PC_NOT_SHARED] Cannot reuse shared partition
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Cannot reuse partition 'counter_b' from shared library './partitionlib'
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There are additional signals that are now targets of hierarchical
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references.
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Note-[PC_GEN_PARTITION] Generating partition
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Generating new partition 'counter_b' at
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'./partitionlib_test2/counter_b_ipFRWc'.
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Warning-[PC_NOT_SHARED] Cannot reuse shared partition
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Cannot reuse partition 'counter_c' from shared library './partitionlib'
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There are additional signals that are now targets of hierarchical
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references.
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Note-[PC_GEN_PARTITION] Generating partition
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Generating new partition 'counter_c' at
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'./partitionlib_test2/counter_c_chn5zb'.
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Note-[PC_SHARED] Reusing shared partition
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Reusing partition 'top' from shared library './partitionlib'.
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Warning-[PC_NOT_SHARED] Cannot reuse shared partition
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Cannot reuse partition 'TB.testbench' from shared library './partitionlib'
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Modified Design Units :
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TB.testbench : "./rtl/testbench.sv", 20
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Type of targets of hierarchical references in this partition have changed.
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Note-[PC_RECOMPILE] Recompiling partition
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Recompiling partition 'TB.testbench' because of following changes.
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Modified Design Units :
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TB.testbench : "./rtl/testbench.sv", 20
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```
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检查log可以发现，穿层信号变化涉及到的模块`counter_b、counter_c`都无法reuse。
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