diff --git a/tests/zfs-tests/tests/perf/perf.shlib b/tests/zfs-tests/tests/perf/perf.shlib
index f70986dfb65b..fe5302387ec5 100644
--- a/tests/zfs-tests/tests/perf/perf.shlib
+++ b/tests/zfs-tests/tests/perf/perf.shlib
@@ -21,6 +21,8 @@ export PERF_RUNTIME=${PERF_RUNTIME:-'180'}
 export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
 export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
 export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
+export PERF_RECORD_CMD=${PERF_RECORD_CMD:-"perf record --call-graph \
+    dwarf,8192 -F 49 -agq -o /dev/stdout -- sleep ${PERF_RUNTIME}"}
 
 # Default to JSON for fio output
 export PERF_FIO_FORMAT=${PERF_FIO_FORMAT:-'json'}
diff --git a/tests/zfs-tests/tests/perf/regression/file_deletion.ksh b/tests/zfs-tests/tests/perf/regression/file_deletion.ksh
index 84174b97f730..020149a0c349 100755
--- a/tests/zfs-tests/tests/perf/regression/file_deletion.ksh
+++ b/tests/zfs-tests/tests/perf/regression/file_deletion.ksh
@@ -12,7 +12,7 @@
 #
 
 #
-# Copyright (c) 2015, 2020 by Delphix. All rights reserved.
+# Copyright (c) 2015, 2021 by Delphix. All rights reserved.
 #
 
 #
@@ -51,18 +51,13 @@ else
 fi
 
 # Variables for use by fio.
-export PERF_RUNTIME=${PERF_RUNTIME:-$PERF_RUNTIME_NIGHTLY}
-export PERF_RANDSEED=${PERF_RANDSEED:-'1234'}
-export PERF_COMPPERCENT=${PERF_COMPPERCENT:-'66'}
-export PERF_COMPCHUNK=${PERF_COMPCHUNK:-'4096'}
-export PERF_RUNTYPE=${PERF_RUNTYPE:-'nightly'}
 export PERF_NTHREADS=1
 export PERF_NTHREADS_PER_FS=${PERF_NTHREADS_PER_FS:-'0'}
 export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'0'}
 export PERF_IOSIZES=${PERF_IOSIZES:-'8k'}
 export PERF_NUMIOS=655360 # 5GB worth of IOs
 
-# Random writing to the file 
+# Random writing to the file
 export NUMJOBS=$(get_max $PERF_NTHREADS)
 export FILE_SIZE=$((TOTAL_SIZE / NUMJOBS))
 export DIRECTORY=$(get_directory)
@@ -80,14 +75,12 @@ log_note "Collecting backend IO stats with lun list $lun_list"
 # Run log collection for only 10 seconds which should be sufficient.
 export PERF_RUNTIME=10
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/random_reads.ksh b/tests/zfs-tests/tests/perf/regression/random_reads.ksh
index dbe114035d2b..b286fbf2ae65 100755
--- a/tests/zfs-tests/tests/perf/regression/random_reads.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_reads.ksh
@@ -80,9 +80,6 @@ fill_zetta_cache 1800
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
         export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -90,7 +87,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh b/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
index 48cafd4d9b9f..504323e7a027 100755
--- a/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_readwrite.ksh
@@ -80,9 +80,6 @@ fill_zetta_cache 1800
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -90,7 +87,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh b/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
index 90cb42858447..e276a2822f53 100755
--- a/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_readwrite_fixed.ksh
@@ -70,9 +70,6 @@ fill_zetta_cache 1800
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -80,7 +77,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/random_writes.ksh b/tests/zfs-tests/tests/perf/regression/random_writes.ksh
index d6b658dfa199..53a5a6b36523 100755
--- a/tests/zfs-tests/tests/perf/regression/random_writes.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_writes.ksh
@@ -68,9 +68,6 @@ export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'0 1'}
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -78,7 +75,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh b/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
index 04d7625a87b4..b67454b8bdd4 100755
--- a/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
+++ b/tests/zfs-tests/tests/perf/regression/random_writes_zil.ksh
@@ -60,9 +60,6 @@ export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'1'}
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -70,7 +67,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
index 5d4776833b3d..44fcda66bb56 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads.ksh
@@ -80,9 +80,6 @@ fill_zetta_cache 1800
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-    typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-        -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
@@ -91,7 +88,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
index 8ea7e9de21cd..bff66da4a9b6 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached.ksh
@@ -63,9 +63,6 @@ log_must fio $FIO_SCRIPTS/mkfiles.fio
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
@@ -74,7 +71,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
index 636ae32efe56..7477e26b5799 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_arc_cached_clone.ksh
@@ -89,9 +89,6 @@ export TESTFS=$PERFPOOL/$TESTCLONE
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
@@ -100,7 +97,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh b/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
index c22f6345ef10..c05dce3ccb34 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_reads_dbuf_cached.ksh
@@ -71,9 +71,6 @@ log_must fio $FIO_SCRIPTS/mkfiles.fio
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "$PERF_SCRIPTS/prefetch_io.sh $PERFPOOL 1" "prefetch"
@@ -82,7 +79,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(
diff --git a/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh b/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
index 40ba82e4c32f..1a5fe0b73d71 100755
--- a/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
+++ b/tests/zfs-tests/tests/perf/regression/sequential_writes.ksh
@@ -68,9 +68,6 @@ export PERF_SYNC_TYPES=${PERF_SYNC_TYPES:-'0 1'}
 lun_list=$(pool_to_lun_list $PERFPOOL)
 log_note "Collecting backend IO stats with lun list $lun_list"
 if is_linux; then
-	typeset perf_record_cmd="perf record --call-graph dwarf,8192 -F 49 -agq \
-	    -o /dev/stdout -- sleep ${PERF_RUNTIME}"
-
 	export collect_scripts=(
 	    "zpool iostat -lpvyL $PERFPOOL 1" "zpool.iostat"
 	    "vmstat -t 1" "vmstat"
@@ -78,7 +75,7 @@ if is_linux; then
 	    "iostat -tdxyz 1" "iostat"
 	    "arcstat 1" "arcstat"
 	    "dstat -at --nocolor 1" "dstat"
-	    "$perf_record_cmd" "perf"
+	    "$PERF_RECORD_CMD" "perf"
 	)
 else
 	export collect_scripts=(