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c3ef9f7528
This checks every file it checked (and a few more), but explicitly instead of "if it works it works" best-effort (which wasn't that good anyway) Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #10512 Closes #12101
83 lines
2.2 KiB
Bash
Executable File
83 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# shellcheck disable=SC1004
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#
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# This file and its contents are supplied under the terms of the
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# Common Development and Distribution License ("CDDL"), version 1.0.
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# You may only use this file in accordance with the terms of version
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# 1.0 of the CDDL.
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#
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# A full copy of the text of the CDDL should have accompanied this
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# source. A copy of the CDDL is also available via the Internet at
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# http://www.illumos.org/license/CDDL.
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#
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#
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# Copyright (c) 2016 by Intel, Corp.
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#
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#
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# Linux platform placeholder for collecting prefetch I/O stats
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# TBD if we can add additional kstats to achieve the desired results
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#
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zfs_kstats="/proc/spl/kstat/zfs"
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function get_prefetch_ios
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{
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typeset -l data_misses="$(awk '$1 == "prefetch_data_misses" \
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{ print $3; exit }' "$zfs_kstats/arcstats")"
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typeset -l metadata_misses="$(awk '$1 == "prefetch_metadata_misses" \
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{ print $3; exit }' "$zfs_kstats/arcstats")"
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typeset -l total_misses=$(( data_misses + metadata_misses ))
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echo "$total_misses"
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}
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function get_prefetched_demand_reads
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{
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typeset -l demand_reads="$(awk '$1 == "demand_hit_predictive_prefetch" \
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{ print $3; exit }' "$zfs_kstats/arcstats")"
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echo "$demand_reads"
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}
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function get_async_upgrade_sync
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{
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typeset -l sync_wait="$(awk '$1 == "async_upgrade_sync" \
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{ print $3; exit }' "$zfs_kstats/arcstats")"
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echo "$sync_wait"
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}
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if [ $# -ne 2 ]
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then
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echo "Usage: ${0##*/} poolname interval" >&2
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exit 1
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fi
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interval=$2
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prefetch_ios=$(get_prefetch_ios)
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prefetched_demand_reads=$(get_prefetched_demand_reads)
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async_upgrade_sync=$(get_async_upgrade_sync)
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while true
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do
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new_prefetch_ios=$(get_prefetch_ios)
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printf '%u\n%-24s\t%u\n' "$(date +%s)" "prefetch_ios" \
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$(( new_prefetch_ios - prefetch_ios ))
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prefetch_ios=$new_prefetch_ios
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new_prefetched_demand_reads=$(get_prefetched_demand_reads)
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printf '%-24s\t%u\n' "prefetched_demand_reads" \
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$(( new_prefetched_demand_reads - prefetched_demand_reads ))
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prefetched_demand_reads=$new_prefetched_demand_reads
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new_async_upgrade_sync=$(get_async_upgrade_sync)
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printf '%-24s\t%u\n' "async_upgrade_sync" \
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$(( new_async_upgrade_sync - async_upgrade_sync ))
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async_upgrade_sync=$new_async_upgrade_sync
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sleep "$interval"
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done
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