Simon A. F. Lund b99b00e595 bdev_xnvme: add option to conserve cpu and set default to false ... To achieve the highest possible IO-rates and lowest latency, then CPU cycles must be spent processing IO. This commit introduces three different techniques dependendent on the 'io_mechanism' used. For 'libaio', xNVMe is instructued via 'opts.poll_io' to not wait for completions, thus xnvme_queue_poke() returns immmediatly, the user can then call xnvme_queue_poke() as frequently as desired. This requires xNVMe v0.5.0. Earlier versions will ignore 'opts.poll_io' for 'libaio'. For 'io_uring', xNVMe is instructed via 'opts.poll_io' to enable IORING_SETUP_IOPOLL. For 'io_uring_cmd', xNVMe is instructued via 'opts.poll_sq' to enable IORING_SETUP_SQPOLL, this sets up a kernel-side thread reaping completions from user-space on the ring. Note that 'io_uring_cmd' requires liburing >= 2.2. This commit enables the above by default. The above can be disabled by setting 'conserve_cpu' to true on the bdev-setup. Signed-off-by: Simon A. F. Lund <simon.lund@samsung.com> Change-Id: Id54f1e59733ce9ae3b174ad4562904d868d4ef4f Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/14678 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>		2022-12-21 09:33:27 +00:00
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bash-completion	trace: update trace help inside SPDK target	2022-09-27 19:41:17 +00:00
bpf	rpc: fix python style	2022-12-21 09:32:24 +00:00
ceph	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
env_dpdk	env_dpdk: add script for comparing DPDK PCI API	2022-12-16 09:27:11 +00:00
perf	misc: Fix spelling mistakes	2022-12-09 08:16:18 +00:00
pkgdep	scripts/pkgdep: Install liburing's .pc to known directory	2022-12-21 09:33:27 +00:00
vagrant	vagrant/create_vbox: add fedora37	2022-12-08 12:56:18 +00:00
ar-xnvme-fixer	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
arm_cross_compile.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
bpftrace.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
check_format.sh	check_format: Add checker for the SPDX-license	2022-11-29 08:27:51 +00:00
common.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
core-collector.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
detect_cc.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
dpdk_mem_info.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
eofnl	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
fio-wrapper	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
gdb_macros.py	scripts: gdb macros should allow missing symbols	2022-12-21 09:32:24 +00:00
gen_ftl.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
gen_nvme.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
genconfig.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
get-pmr	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
histogram.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
iostat.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
lspci	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
pc_libs.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
pc_modules.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
pc.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
pkgdep.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
posix.txt	build: Automatically detect use of POSIX includes	2017-05-08 13:20:37 -07:00
prep_benchmarks.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
qat_setup.sh	scripts/qat_setup: Remove VFs' pci id from the target bind driver	2022-12-08 12:56:56 +00:00
rpc_http_proxy.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
rpc.py	bdev_xnvme: add option to conserve cpu and set default to false	2022-12-21 09:33:27 +00:00
rxe_cfg_small.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
setup.sh	scripts/setup: Stop checking for broken uio_pci_generic driver	2022-12-14 08:03:17 +00:00
sma-client.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
sma.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
spdk-gpt.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
spdkcli.py	add (c) and SPDX header to python files as needed	2022-11-10 08:28:53 +00:00
spdx.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00
sync_dev_uevents.sh	add (c) and SPDX header to bash files as needed	2022-11-29 08:27:51 +00:00