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9e3d4dae98
Add a test which checks that the RSS table is at least 4x the max queue count supported by the device. The original RSS spec from Microsoft stated that the RSS indirection table should be 2 to 8 times the CPU count, presumably assuming queue per CPU. If the CPU count is not a power of two, however, a power-of-2 table 2x larger than queue count results in a 33% traffic imbalance. Validate that the indirection table is at least 4x the queue count. This lowers the imbalance to 16% which empirically appears to be more acceptable to memcache-like workloads. Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20260131225454.1225151-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
81 lines
1.6 KiB
Makefile
81 lines
1.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0+ OR MIT
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# Check if io_uring supports zero-copy receive
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HAS_IOURING_ZCRX := $(shell \
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echo -e '#include <liburing.h>\n' \
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'void *func = (void *)io_uring_register_ifq;\n' \
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'int main() {return 0;}' | \
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$(CC) -luring -x c - -o /dev/null 2>&1 && echo y)
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ifeq ($(HAS_IOURING_ZCRX),y)
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COND_GEN_FILES += iou-zcrx
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else
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$(warning excluding iouring tests, liburing not installed or too old)
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endif
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TEST_GEN_FILES := \
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$(COND_GEN_FILES) \
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# end of TEST_GEN_FILES
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TEST_PROGS = \
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csum.py \
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devlink_port_split.py \
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devlink_rate_tc_bw.py \
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devmem.py \
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ethtool.sh \
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ethtool_extended_state.sh \
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ethtool_mm.sh \
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ethtool_rmon.sh \
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hw_stats_l3.sh \
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hw_stats_l3_gre.sh \
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iou-zcrx.py \
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irq.py \
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loopback.sh \
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nic_timestamp.py \
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pp_alloc_fail.py \
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rss_api.py \
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rss_ctx.py \
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rss_drv.py \
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rss_flow_label.py \
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rss_input_xfrm.py \
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toeplitz.py \
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tso.py \
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xsk_reconfig.py \
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#
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TEST_FILES := \
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ethtool_lib.sh \
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#
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TEST_INCLUDES := \
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$(wildcard lib/py/*.py ../lib/py/*.py) \
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../../../net/lib.sh \
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../../../net/forwarding/ipip_lib.sh \
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../../../net/forwarding/lib.sh \
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../../../net/forwarding/tc_common.sh \
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#
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# YNL files, must be before "include ..lib.mk"
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YNL_GEN_FILES := \
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ncdevmem \
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toeplitz \
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# end of YNL_GEN_FILES
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TEST_GEN_FILES += $(YNL_GEN_FILES)
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TEST_GEN_FILES += $(patsubst %.c,%.o,$(wildcard *.bpf.c))
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include ../../../lib.mk
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# YNL build
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YNL_GENS := \
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ethtool \
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netdev \
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# end of YNL_GENS
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include ../../../net/ynl.mk
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include ../../../net/bpf.mk
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ifeq ($(HAS_IOURING_ZCRX),y)
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$(OUTPUT)/iou-zcrx: LDLIBS += -luring
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endif
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