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https://github.com/verilator/verilator.git
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c52f3349d1
The --trace-threads option can now be used to perform tracing on a thread separate from the main thread when using VCD tracing (with --trace-threads 1). For FST tracing --trace-threads can be 1 or 2, and --trace-fst --trace-threads 1 is the same a what --trace-fst-threads used to be (which is now deprecated). Performance numbers on SweRV EH1 CoreMark, clang 6.0.0, Intel i7-3770 @ 3.40GHz, IO to ramdisk, with numactl set to schedule threads on different physical cores. Relative speedup: --trace -> --trace --trace-threads 1 +22% --trace-fst -> --trace-fst --trace-threads 1 +38% (as --trace-fst-thread) --trace-fst -> --trace-fst --trace-threads 2 +93% Speed relative to --trace with no threaded tracing: --trace 1.00 x --trace --trace-threads 1 0.82 x --trace-fst 1.79 x --trace-fst --trace-threads 1 1.23 x --trace-fst --trace-threads 2 0.87 x This means FST tracing with 2 extra threads is now faster than single threaded VCD tracing, and is on par with threaded VCD tracing. You do pay for it in total compute though as --trace-fst --trace-threads 2 uses about 240% CPU vs 150% for --trace-fst --trace-threads 1, and 155% for --trace --trace threads 1. Still for interactive use it should be helpful with large designs.
63 lines
2.0 KiB
Perl
Executable File
63 lines
2.0 KiB
Perl
Executable File
#!/usr/bin/perl
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if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); die; }
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# DESCRIPTION: Verilator: Verilog Test driver/expect definition
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#
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# Copyright 2003-2009 by Wilson Snyder. This program is free software; you
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# can redistribute it and/or modify it under the terms of either the GNU
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# Lesser General Public License Version 3 or the Perl Artistic License
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# Version 2.0.
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# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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scenarios(vlt => 1);
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my $root = "..";
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compile(
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# Can't use --coverage and --savable together, so cheat and compile inline
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verilator_flags2 => ["--cc",
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"--coverage-toggle --coverage-line --coverage-user",
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"--trace --vpi ",
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($Self->cfg_with_threaded
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? "--threads 2 $root/include/verilated_threads.cpp" : ""),
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($Self->cfg_with_threaded
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? "--trace-threads 1" : ""),
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"$root/include/verilated_save.cpp"],
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);
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execute(
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check_finished => 1,
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);
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my %hit;
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foreach my $file (glob("$root/include/*.cpp $root/include/*.h")) {
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$file =~ s!.*/!!;
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# This file isn't actually used by the runtime (though
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# it might be in the future? hence it's under include/)
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# It is used to build verilator.
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if ($file =~ /verilated_unordered_set_map\.h/) { next; }
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print "NEED: $file\n" if $Self->{verbose};
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$hit{$file} = 0;
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}
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foreach my $dfile (glob("$Self->{obj_dir}/*.d")) {
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my $wholefile = file_contents($dfile);
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foreach my $file (split /\s+/, $wholefile) {
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$file =~ s!.*/!!;
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print "USED: $file\n" if $Self->{verbose};
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$hit{$file} = 1;
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}
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}
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foreach my $file (sort keys %hit) {
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if (!$hit{$file}
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&& $file !~ /_sc/
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&& $file !~ /_fst/
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&& ($file !~ /_thread/ || $Self->cfg_with_threaded)) {
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error("Include file not covered by t_verilated_all test: ",$file);
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}
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}
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ok(1);
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1;
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