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target: Add VLT_NUM_THREADS to configure threads used by verilator #148

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target: Add VLT_NUM_THREADS to configure threads used by verilator #148

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48c4f39
target: Add `VLT_NUM_THREADS` to threads used by verilator
zero9178 Jun 5, 2024
dab85ad
address review comments
zero9178 Jun 5, 2024
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5 changes: 5 additions & 0 deletions target/common/common.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,7 @@ EVENTVIS_PY ?= $(UTIL_DIR)/trace/eventvis.py
# a two-liner with the OS on the first line, hence the tail -n1
VERILATOR_ROOT ?= $(dir $(shell $(VERILATOR_SEPP) which verilator | tail -n1))..
VLT_ROOT ?= ${VERILATOR_ROOT}
VLT_NUM_THREADS ?= 1

MATCH_END := '/+incdir+/ s/$$/\/*\/*/'
MATCH_BGN := 's/+incdir+//g'
Expand Down Expand Up @@ -86,7 +87,11 @@ VLT_FLAGS += -Wno-UNSIGNED
VLT_FLAGS += -Wno-UNOPTFLAT
VLT_FLAGS += -Wno-fatal
VLT_FLAGS += --unroll-count 1024
VLT_FLAGS += --threads $(VLT_NUM_THREADS)
VLT_CFLAGS += -std=c++14 -pthread
# Custom test benches including the harness must manually define 'VL_THREADED' if multithreaded.
# See https://github.com/verilator/verilator/issues/3668#issuecomment-1288989145.
VLT_CFLAGS += -DVL_THREADED
VLT_CFLAGS +=-I ${VLT_BUILDDIR} -I $(VLT_ROOT)/include -I $(VLT_ROOT)/include/vltstd -I $(VLT_FESVR)/include -I $(TB_DIR) -I ${MKFILE_DIR}/test

ANNOTATE_FLAGS ?= -q --keep-time --addr2line=$(ADDR2LINE)
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1 change: 1 addition & 0 deletions target/snitch_cluster/Makefile
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Expand Up @@ -103,6 +103,7 @@ VLT_COBJ += $(VLT_BUILDDIR)/tb/tb_bin.o
VLT_COBJ += $(VLT_BUILDDIR)/vlt/verilated.o
VLT_COBJ += $(VLT_BUILDDIR)/vlt/verilated_dpi.o
VLT_COBJ += $(VLT_BUILDDIR)/vlt/verilated_vcd_c.o
VLT_COBJ += $(VLT_BUILDDIR)/vlt/verilated_threads.o
# Bootdata
VLT_COBJ += $(VLT_BUILDDIR)/generated/bootdata.o

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