Merge branch 'linux-zpios' into refs/top-bases/linux-zfs-branch
This commit is contained in:
Brian Behlendorf
commit
f8154e7251
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@ -1,83 +1,115 @@
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#!/bin/bash
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#
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# Wrapper script for easily running a survey of zpios based tests
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#
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prog=survey.sh
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. ../.script-config
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. ./common.sh
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PROG=zpios-survey.sh
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LOG=/home/`whoami`/zpios-logs/`uname -r`/zpios-`date +%Y%m%d`/
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mkdir -p ${LOG}
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usage() {
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cat << EOF
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USAGE:
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$0 [hvp] <-c config> <-t test>
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# Apply all tunings described below to generate some best case
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# numbers for what is acheivable with some more elbow grease.
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NAME="prefetch+zerocopy+checksum+pending1024+kmem"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"zfs_prefetch_disable=1 zfs_vdev_max_pending=1024 zio_bulk_flags=0x100" \
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"--zerocopy" \
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${LOG}/${NAME}/ \
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"${CMDDIR}/zfs/zfs set checksum=off lustre" | \
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tee ${LOG}/${NAME}.txt
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DESCRIPTION:
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Helper script for easy zpios survey benchmarking.
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# Baseline number for an out of the box config with no manual tuning.
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# Ideally, we will want things to be automatically tuned and for this
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# number to approach the tweaked out results above.
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NAME="baseline"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"" \
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"" \
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${LOG}/${NAME}/ | \
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tee ${LOG}/${NAME}.txt
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OPTIONS:
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-h Show this message
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-v Verbose
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-p Enable profiling
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-c Zpool configuration
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-t Zpios test
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-l Zpios survey log
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EOF
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}
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print_header() {
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echo
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echo "================================================================"
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echo "Test: $1"
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echo
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}
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# Baseline performance for an out of the box config with no manual tuning.
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# Ideally, we want everything to be automatically tuned for your system and
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# for this to perform reasonably well.
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zpios_survey_base() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+baseline"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# Disable ZFS's prefetching. For some reason still not clear to me
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# current prefetching policy is quite bad for a random workload.
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# Allow the algorithm to detect a random workload and not do anything
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# may be the way to address this issue.
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NAME="prefetch"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"zfs_prefetch_disable=1" \
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"" \
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${LOG}/${NAME}/ | \
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tee ${LOG}/${NAME}.txt
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# Allowint the algorithm to detect a random workload and not do
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# anything may be the way to address this issue.
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zpios_survey_prefetch() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+prefetch"
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print_header ${TEST_NAME}
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# As expected, simulating a zerocopy IO path improves performance
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# by freeing up lots of CPU which is wasted move data between buffers.
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NAME="zerocopy"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"" \
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"--zerocopy" \
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${LOG}/${NAME}/ | \
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tee ${LOG}/${NAME}.txt
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./zfs.sh ${VERBOSE_FLAG} \
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zfs="zfs_prefetch_disable=1" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# Simulating a zerocopy IO path should improve performance by freeing up
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# lots of CPU which is wasted move data between buffers.
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zpios_survey_zerocopy() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+zerocopy"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} \
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-o "--zerocopy" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# Disabling checksumming should show some (if small) improvement
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# simply due to freeing up a modest amount of CPU.
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NAME="checksum"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"" \
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"" \
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${LOG}/${NAME}/ \
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"${CMDDIR}/zfs/zfs set checksum=off lustre" | \
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tee ${LOG}/${NAME}.txt
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zpios_survey_checksum() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+checksum"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} \
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-s "set checksum=off" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# Increasing the pending IO depth also seems to improve things likely
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# at the expense of latency. This should be exported more because I'm
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# at the expense of latency. This should be explored more because I'm
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# seeing a much bigger impact there that I would have expected. There
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# may be some low hanging fruit to be found here.
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NAME="pending"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"zfs_vdev_max_pending=1024" \
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"" \
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${LOG}/${NAME}/ | \
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tee ${LOG}/${NAME}.txt
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zpios_survey_pending() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+pending"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} \
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zfs="zfs_vdev_max_pending=1024" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# To avoid memory fragmentation issues our slab implementation can be
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# based on a virtual address space. Interestingly, we take a pretty
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@ -92,11 +124,84 @@ echo "----------------------- ${NAME} ------------------------------"
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#
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# 0x100 = KMC_KMEM - Force kmem_* based slab
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# 0x200 = KMC_VMEM - Force vmem_* based slab
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NAME="kmem"
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echo "----------------------- ${NAME} ------------------------------"
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./zpios.sh \
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"" \
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"zio_bulk_flags=0x100" \
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"" \
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${LOG}/${NAME}/ | \
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tee ${LOG}/${NAME}.txt
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zpios_survey_kmem() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+kmem"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} \
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zfs="zio_bulk_flags=0x100" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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# Apply all possible turning concurrently to get a best case number
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zpios_survey_all() {
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TEST_NAME="${ZPOOL_CONFIG}+${ZPIOS_TEST}+all"
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print_header ${TEST_NAME}
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./zfs.sh ${VERBOSE_FLAG} \
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zfs="zfs_prefetch_disable=1" \
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zfs="zfs_vdev_max_pending=1024" \
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zfs="zio_bulk_flags=0x100" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zpios.sh ${VERBOSE_FLAG} -c ${ZPOOL_CONFIG} -t ${ZPIOS_TEST} \
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-o "--zerocopy" \
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-s "set checksum=off" | \
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tee -a ${ZPIOS_SURVEY_LOG}
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./zfs.sh -u ${VERBOSE_FLAG} | \
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tee -a ${ZPIOS_SURVEY_LOG}
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}
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PROFILE=
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ZPOOL_NAME=zpios-survey
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ZPOOL_CONFIG=zpool-config.sh
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ZPIOS_TEST=zpios-test.sh
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ZPIOS_SURVEY_LOG=/dev/null
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while getopts 'hvpc:t:l:' OPTION; do
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case $OPTION in
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h)
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usage
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exit 1
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;;
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v)
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VERBOSE=1
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VERBOSE_FLAG="-v"
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;;
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p)
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PROFILE=1
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PROFILE_FLAG="-p"
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;;
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c)
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ZPOOL_CONFIG=${OPTARG}
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;;
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t)
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ZPIOS_TEST=${OPTARG}
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;;
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l)
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ZPIOS_SURVEY_LOG=${OPTARG}
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;;
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?)
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usage
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exit
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;;
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esac
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done
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if [ $(id -u) != 0 ]; then
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die "Must run as root"
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fi
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zpios_survey_base
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zpios_survey_prefetch
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zpios_survey_zerocopy
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zpios_survey_checksum
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zpios_survey_pending
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zpios_survey_kmem
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zpios_survey_all
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exit 0
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@ -28,6 +28,9 @@ OPTIONS:
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-p Enable profiling
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-c Zpool configuration
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-t Zpios test
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-o Additional zpios options
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-l Additional zpool options
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-s Additional zfs options
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EOF
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}
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@ -115,8 +118,11 @@ PROFILE=
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ZPOOL_CONFIG=zpool-config.sh
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ZPIOS_TEST=zpios-test.sh
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ZPOOL_NAME=zpios
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ZPIOS_OPTIONS=
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ZPOOL_OPTIONS=""
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ZFS_OPTIONS=""
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while getopts 'hvpc:t:' OPTION; do
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while getopts 'hvpc:t:o:l:s:' OPTION; do
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case $OPTION in
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h)
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usage
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@ -135,6 +141,15 @@ while getopts 'hvpc:t:' OPTION; do
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t)
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ZPIOS_TEST=${TOPDIR}/scripts/zpios-test/${OPTARG}.sh
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;;
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o)
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ZPIOS_OPTIONS=${OPTARG}
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;;
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l) # Passed through to zpool-create.sh
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ZPOOL_OPTIONS=${OPTARG}
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;;
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s) # Passed through to zpool-create.sh
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ZFS_OPTIONS=${OPTARG}
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;;
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?)
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usage
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exit
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@ -170,7 +185,8 @@ if [ ${VERBOSE} ]; then
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fi
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# Create the zpool configuration
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./zpool-create.sh ${VERBOSE_FLAG} -p ${ZPOOL_NAME} -c ${ZPOOL_CONFIG} || exit 1
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./zpool-create.sh ${VERBOSE_FLAG} -p ${ZPOOL_NAME} -c ${ZPOOL_CONFIG} \
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-l "${ZPOOL_OPTIONS}" -s "${ZFS_OPTIONS}" || exit 1
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if [ $PROFILE ]; then
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ZPIOS_CMD="${ZPIOS_CMD} --log=${PROFILE_ZPIOS_LOG}"
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