pulp-platform · colluca · Sep 26, 2025 · Sep 26, 2025 · Sep 26, 2025 · Sep 26, 2025
diff --git a/.gitignore b/.gitignore
@@ -8,9 +8,10 @@
 .bender
 working_dir/
 
-# Python virtual environment
+# Python virtual environment and caches
 .cache/pip
 .venv
+__pycache__
 
 # Generated source files
 .generated

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
@@ -57,6 +57,9 @@ chs-sw:
 
 vsim-compile:
   stage: build
+  extends:
+    - .cache-deps
+    - .init-env
   needs:
     - generate-rtl
   variables:
@@ -101,6 +104,29 @@ sim-vsim:
     paths:
       - transcript
 
+#####################
+# Run Experiments   #
+#####################
+
+sim-exps:
+  stage: run
+  extends:
+    - .cache-deps
+    - .init-env
+  needs:
+    - chs-sw
+    - sn-sw
+    - vsim-compile
+  parallel:
+    matrix:
+      - EXPERIMENT: multicast
+      - EXPERIMENT: reduction
+      - EXPERIMENT: barrier
+  script:
+    - cd experiments/$EXPERIMENT && ./experiments.py --ci --actions sw run -j
+  artifacts:
+    expire_in: 7 days
+
 ###################
 # Physical Design #
 ###################

diff --git a/.gitlab/common.yml b/.gitlab/common.yml
@@ -68,7 +68,6 @@ variables:
   script:
     - make sn-tests DEBUG=ON
     - make sn-apps DEBUG=ON
-    - make pb-sn-tests
   artifacts:
     paths:
       - sw/snitch/tests/build/*.elf

diff --git a/.gitlab/sw-tests.yml b/.gitlab/sw-tests.yml
@@ -23,7 +23,7 @@
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/non_null_exitcode.elf, NZ_EXIT_CODE: 896 }
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/multicluster_atomics.elf }
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/mcast_barrier.elf }
-      - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/dma_multicast.elf }
+      - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/multicast_benchmark.elf }
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/multi_mcast.elf }
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/row_col_mcast.elf }
       - { CHS_BINARY: $CHS_BUILD_DIR/simple_offload.spm.elf, SN_BINARY: $SN_BUILD_DIR/access_spm.elf }

diff --git a/Bender.lock b/Bender.lock
@@ -25,7 +25,7 @@ packages:
     - obi_peripherals
     - register_interface
   axi:
-    revision: bec548fa2a9b18cbd7531105bb1fdf481ea8ad49
+    revision: 06410c36819924e32db2afa428d244dbdbcd5d4e
     version: null
     source:
       Git: https://github.com/colluca/axi.git
@@ -129,8 +129,8 @@ packages:
     - common_cells
     - register_interface
   cluster_icache:
-    revision: 64e21ae455bbdde850c4df13bef86ea55ac42537
-    version: 0.2.0
+    revision: 1642961b9561513f283674efc2c90f24855e8d39
+    version: 0.3.1
     source:
       Git: https://github.com/pulp-platform/cluster_icache.git
     dependencies:
@@ -146,7 +146,7 @@ packages:
     dependencies:
     - common_cells
   common_cells:
-    revision: e1c09c75775c5f03eb45906d5145dbd2f5bcfb95
+    revision: ca9d577f2fbc45ec557ab4e0905bbfc154441540
     version: null
     source:
       Git: https://github.com/pulp-platform/common_cells.git
@@ -207,7 +207,7 @@ packages:
       Path: .deps/fhg_spu_cluster
     dependencies: []
   floo_noc:
-    revision: ea35a9909d60d552bbdafc7e898590f326b1898a
+    revision: 8d19d926fbc9174984a67d76f349d82ea117c443
     version: null
     source:
       Git: https://github.com/pulp-platform/FlooNoC.git
@@ -216,7 +216,15 @@ packages:
     - axi_riscv_atomics
     - common_cells
     - common_verification
+    - floo_noc_pd
+    - fpnew
     - idma
+  floo_noc_pd:
+    revision: null
+    version: null
+    source:
+      Path: working_dir/floo_noc/./pd
+    dependencies: []
   fpnew:
     revision: a8e0cba6dd50f357ece73c2c955d96efc3c6c315
     version: null
@@ -266,8 +274,8 @@ packages:
     dependencies:
     - tech_cells_generic
   idma:
-    revision: 7829f71691a62c1e2e5e3230f370f222c7a83087
-    version: null
+    revision: 28a36e5e07705549e59fc33db96ab681bc1ca88e
+    version: 0.6.5
     source:
       Git: https://github.com/pulp-platform/iDMA.git
     dependencies:
@@ -383,7 +391,7 @@ packages:
     - common_cells
     - register_interface
   snitch_cluster:
-    revision: 5d6c957c70e3824e2330d8308eb904724cd41cbe
+    revision: ecf876f5d8726c6424970c99c5e91f83aaedeacd
     version: null
     source:
       Git: https://github.com/pulp-platform/snitch_cluster.git

diff --git a/Bender.yml b/Bender.yml
@@ -9,11 +9,11 @@ package:
 
 dependencies:
   register_interface: { git: "https://github.com/pulp-platform/register_interface.git", version: "0.4.5"                                }
-  axi:                { git: "https://github.com/pulp-platform/axi.git",                version: "0.39.6"                               }
+  axi:                { git: "https://github.com/colluca/axi.git",                      rev: "multicast"                                }
   common_cells:       { git: "https://github.com/pulp-platform/common_cells.git",       rev: "snitch"                                   }
   cheshire:           { git: "https://github.com/pulp-platform/cheshire.git",           rev: "picobello"                                }
-  snitch_cluster:     { git: "https://github.com/pulp-platform/snitch_cluster.git",     rev: "5d6c957c70e3824e2330d8308eb904724cd41cbe" }
-  floo_noc:           { git: "https://github.com/pulp-platform/FlooNoC.git",            rev: "develop"                                  }
+  snitch_cluster:     { git: "https://github.com/pulp-platform/snitch_cluster.git",     rev: "main"                         }
+  floo_noc:           { git: "https://github.com/pulp-platform/FlooNoC.git",            rev: "reduction-vc-rebase"                        }
   obi:                { git: "https://github.com/pulp-platform/obi.git",                rev: "acfcd0f80c7539aa8da7821a66d9acf2074a5b4e" }
   redmule:            { git: "https://github.com/pulp-platform/redmule.git",            rev: "picobello"                                }
   hci:                { git: "https://github.com/pulp-platform/hci.git",                rev: "06fcba671e060f2e1b03b7ebe2d3e719f1557099" }
@@ -36,7 +36,7 @@ sources:
   - target: pb_gen_rtl
     files:
       # Level 0.0
-      - .generated/floo_picobello_noc_pkg.sv
+      - floo_picobello_noc_pkg_REDUCTION.sv
       - .generated/snitch_cluster_pkg.sv
       - .generated/pb_soc_regs_pkg.sv
       # Level 0.1

diff --git a/Makefile b/Makefile
@@ -20,20 +20,23 @@ SN_ROOT   = $(shell $(BENDER) path snitch_cluster)
 FLOO_ROOT = $(shell $(BENDER) path floo_noc)
 
 # Executables
-BENDER           ?= bender -d $(PB_ROOT)
+BENDER           ?= bender --suppress W22 -d $(PB_ROOT)
 FLOO_GEN         ?= floogen
 VERIBLE_FMT      ?= verible-verilog-format
 VERIBLE_FMT_ARGS ?= --flagfile .verilog_format --inplace --verbose
 PEAKRDL          ?= peakrdl
 
 # Tiles configuration
-SN_CLUSTERS = $(shell $(FLOO_GEN) -c $(FLOO_CFG) --query endpoints.cluster.num 2>/dev/null)
-L2_TILES = $(shell $(FLOO_GEN) -c $(FLOO_CFG) --query endpoints.l2_spm.num 2>/dev/null)
+SN_CLUSTERS = $(shell $(FLOO_GEN) query -c $(FLOO_CFG) endpoints.cluster.num 2>/dev/null)
+L2_TILES = $(shell $(FLOO_GEN) query -c $(FLOO_CFG) endpoints.l2_spm.num 2>/dev/null)
 
 # Bender prerequisites
 BENDER_YML = $(PB_ROOT)/Bender.yml
 BENDER_LOCK = $(PB_ROOT)/Bender.lock
 
+$(PB_GEN_DIR):
+	mkdir -p $@
+
 ################
 # Bender flags #
 ################
@@ -45,7 +48,7 @@ SIM_TARGS += -t simulation -t test -t idma_test
 # systemRDL #
 #############
 
-PB_RDL_ALL += $(PB_GEN_DIR)/picobello.rdl
+PB_RDL_ALL += $(PB_GEN_DIR)/picobello_addrmap.rdl
 PB_RDL_ALL += $(PB_GEN_DIR)/fll.rdl $(PB_GEN_DIR)/pb_chip_regs.rdl
 PB_RDL_ALL += $(PB_GEN_DIR)/snitch_cluster.rdl
 PB_RDL_ALL += $(wildcard $(PB_ROOT)/cfg/rdl/*.rdl)
@@ -58,14 +61,14 @@ $(PB_GEN_DIR)/pb_soc_regs.sv: $(PB_GEN_DIR)/pb_soc_regs_pkg.sv
 $(PB_GEN_DIR)/pb_soc_regs_pkg.sv: $(PB_ROOT)/cfg/rdl/pb_soc_regs.rdl
 	$(PEAKRDL) regblock $< -o $(PB_GEN_DIR) --cpuif apb4-flat --default-reset arst_n -P Num_Clusters=$(SN_CLUSTERS) -P Num_Mem_Tiles=$(L2_TILES)
 
-$(PB_GEN_DIR)/picobello.rdl: $(FLOO_CFG)
-	$(FLOO_GEN) -c $(FLOO_CFG) -o $(PB_GEN_DIR) --rdl --rdl-as-mem --rdl-memwidth=32
+$(PB_GEN_DIR)/picobello_addrmap.rdl: $(FLOO_CFG)
+	$(FLOO_GEN) rdl -c $(FLOO_CFG) -o $(PB_GEN_DIR) --as-mem --memwidth=32
 
 # Those are dummy RDL files, for generation without access to the PD repository.
-$(PB_GEN_DIR)/fll.rdl $(PB_GEN_DIR)/pb_chip_regs.rdl:
+$(PB_GEN_DIR)/fll.rdl $(PB_GEN_DIR)/pb_chip_regs.rdl: | $(PB_GEN_DIR)
 	@touch $@
 
-$(PB_GEN_DIR)/pb_addrmap.h: $(PB_GEN_DIR)/picobello.rdl $(PB_RDL_ALL)
+$(PB_GEN_DIR)/pb_addrmap.h: $(PB_GEN_DIR)/picobello_addrmap.rdl $(PB_RDL_ALL)
 	$(PEAKRDL) c-header $< $(PEAKRDL_INCLUDES) $(PEAKRDL_DEFINES) -o $@ -i -b ltoh
 
 $(PB_GEN_DIR)/pb_addrmap.svh: $(PB_RDL_ALL)
@@ -130,12 +133,12 @@ endif
 
 floo-hw-all: $(PB_GEN_DIR)/floo_picobello_noc_pkg.sv
 $(PB_GEN_DIR)/floo_picobello_noc_pkg.sv: $(FLOO_CFG) | $(PB_GEN_DIR)
-	$(FLOO_GEN) -c $(FLOO_CFG) -o $(PB_GEN_DIR) --only-pkg $(FLOO_GEN_FLAGS)
+	$(FLOO_GEN) pkg -c $(FLOO_CFG) -o $(PB_GEN_DIR) $(FLOO_GEN_FLAGS)
 
 
 floo-clean:
 	rm -f $(PB_GEN_DIR)/floo_picobello_noc_pkg.sv
-	rm -f $(PB_GEN_DIR)/picobello.rdl
+	rm -f $(PB_GEN_DIR)/picobello_addrmap.rdl
 
 ###################
 # Physical Design #
@@ -172,16 +175,16 @@ clean-pd:
 
 PB_HW_ALL += $(CHS_HW_ALL)
 PB_HW_ALL += $(CHS_SIM_ALL)
-PB_HW_ALL += $(PB_GEN_DIR)/floo_picobello_noc_pkg.sv
 PB_HW_ALL += $(PB_RDL_HW_ALL)
-PB_HW_ALL += update-sn-cfg
 
-.PHONY: picobello-hw-all picobello-clean clean
+.PHONY: picobello-hw-all picobello-hw-clean clean
+
+picobello-hw-all all: $(PB_HW_ALL) update-sn-cfg sn-hw-all floo-hw-all
 
-picobello-hw-all all: $(PB_HW_ALL) sn-hw-all
-	$(MAKE) $(PB_HW_ALL)
+picobello-hw-clean: sn-hw-clean floo-clean
+	rm -rf $(PB_HW_ALL)
 
-picobello-hw-clean clean: sn-hw-clean floo-clean
+clean: picobello-hw-clean
 	rm -rf $(BENDER_ROOT)
 
 ############
@@ -195,6 +198,7 @@ include $(PB_ROOT)/sw/sw.mk
 ##############
 
 TB_DUT = tb_picobello_top
+SIM_DIR = $(PB_ROOT)
 
 include $(PB_ROOT)/target/sim/vsim/vsim.mk
 include $(PB_ROOT)/target/sim/traces.mk
@@ -221,13 +225,14 @@ python-venv: .venv
 .venv:
 	$(BASE_PYTHON) -m venv $@
 	. $@/bin/activate && \
-	python -m pip install --upgrade pip setuptools && \
-	python -m pip install --cache-dir $(PIP_CACHE_DIR) -r requirements.txt && \
+	python -m pip install --upgrade pip "setuptools<81" && \
+	python -m pip install --no-build-isolation --cache-dir $(PIP_CACHE_DIR) -r requirements.txt && \
 	python -m pip install --cache-dir $(PIP_CACHE_DIR) $(shell $(BENDER) path floo_noc) --no-deps && \
-	python -m pip install --cache-dir $(PIP_CACHE_DIR) "$(shell $(BENDER) path snitch_cluster)[kernels]"
+	python -m pip install --cache-dir $(PIP_CACHE_DIR) -e "$(shell $(BENDER) path snitch_cluster)[kernels]"
 
 python-venv-clean:
 	rm -rf .venv
+	rm -rf $(PIP_CACHE_DIR)
 
 verible-fmt:
 	$(VERIBLE_FMT) $(VERIBLE_FMT_ARGS) $(shell $(BENDER) script flist $(SIM_TARGS) --no-deps)

diff --git a/cfg/snitch_cluster.json b/cfg/snitch_cluster.json
@@ -12,7 +12,6 @@
         addr_width: 48,
         data_width: 64,
         atomic_id_width: 5, // clog2(#clusters + 2)
-        user_width: 53, // addr_width + atomic_id_width
         tcdm: {
             size: 128,
             banks: 32,
@@ -26,13 +25,16 @@
         dma_req_fifo_depth: 8,
         narrow_trans: 4,
         wide_trans: 32,
-        dma_user_width: 48,
-        enable_multicast: true,
+        enable_narrow_collectives: true,
+        enable_wide_collectives: true,
+        enable_dca: true,
+        dca_data_width: 512,
         cluster_base_expose: true,
         alias_region_enable: true,
         alias_region_base: 0x30000000,
         num_exposed_wide_tcdm_ports: 1,
         narrow_axi_port_expose: true,
+        collective_width: 4,
         enable_external_interrupts: true,
         vm_support: false,
         // Timing parameters

diff --git a/experiments/.gitignore b/experiments/.gitignore
@@ -0,0 +1,6 @@
+build/
+runs/
+plots/
+results/
+data/
+hw/
diff --git a/experiments/barrier/__init__.py b/experiments/barrier/__init__.py
@@ -0,0 +1,9 @@
+# Copyright 2025 ETH Zurich and University of Bologna.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Luca Colagrande <colluca@iis.ee.ethz.ch>
+
+from . import plot, experiments, fit
+
+__all__ = ["plot", "experiments", "fit"]