在 2020/8/25 上午9:56, Daniel Jordan 写道:
> On Mon, Aug 24, 2020 at 01:24:20PM -0700, Hugh Dickins wrote:
>> On Mon, 24 Aug 2020, Andrew Morton wrote:
>>> On Mon, 24 Aug 2020 20:54:33 +0800 Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx> wrote:
>> Andrew demurred on version 17 for lack of review. Alexander Duyck has
>> been doing a lot on that front since then. I have intended to do so,
>> but it's a mirage that moves away from me as I move towards it: I have
>
> Same, I haven't been able to keep up with the versions or the recent review
> feedback. I got through about half of v17 last week and hope to have more time
> for the rest this week and beyond.
>
>>>> Following Daniel Jordan's suggestion, I have run 208 'dd' with on 104
>>>> containers on a 2s * 26cores * HT box with a modefied case:
>
> Alex, do you have a pointer to the modified readtwice case?
>
Hi Daniel,
my readtwice modification like below.
diff --git a/case-lru-file-readtwice b/case-lru-file-readtwice
index 85533b248634..57cb97d121ae 100755
--- a/case-lru-file-readtwice
+++ b/case-lru-file-readtwice
@@ -15,23 +15,30 @@
. ./hw_vars
-for i in `seq 1 $nr_task`
-do
- create_sparse_file $SPARSE_FILE-$i $((ROTATE_BYTES / nr_task))
- timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-1-$i 2>&1 &
- timeout --foreground -s INT ${runtime:-600} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-2-$i 2>&1 &
-done
+OUT_DIR=$(hostname)-${nr_task}c-$(((mem + (1<<29))>>30))g
+TEST_CASES=${@:-$(echo case-*)}
+
+echo $((1<<30)) > /proc/sys/vm/max_map_count
+echo $((1<<20)) > /proc/sys/kernel/threads-max
+echo 1 > /proc/sys/vm/overcommit_memory
+#echo 3 > /proc/sys/vm/drop_caches
+
+
+i=1
+
+if [ "$1" == "m" ];then
+ mount_tmpfs
+ create_sparse_root
+ create_sparse_file $SPARSE_FILE-$i $((ROTATE_BYTES))
+ exit
+fi
+
+
+if [ "$1" == "r" ];then
+ (timeout --foreground -s INT ${runtime:-300} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-1-$i 2>&1)&
+ (timeout --foreground -s INT ${runtime:-300} dd bs=4k if=$SPARSE_FILE-$i of=/dev/null > $TMPFS_MNT/dd-output-2-$i 2>&1)&
+fi
wait
sleep 1
-for file in $TMPFS_MNT/dd-output-*
-do
- [ -s "$file" ] || {
- echo "dd output file empty: $file" >&2
- }
- cat $file
- rm $file
-done
-
-rm `seq -f $SPARSE_FILE-%g 1 $nr_task`
diff --git a/hw_vars b/hw_vars
index 8731cefb9f57..ceeaa9f17c0b 100755
--- a/hw_vars
+++ b/hw_vars
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -ex
if [ -n "$runtime" ]; then
USEMEM="$CMD ./usemem --runtime $runtime"
@@ -43,7 +43,7 @@ create_loop_devices()
modprobe loop 2>/dev/null
[ -e "/dev/loop0" ] || modprobe loop 2>/dev/null
- for i in $(seq 0 8)
+ for i in $(seq 0 104)
do
[ -e "/dev/loop$i" ] && continue
mknod /dev/loop$i b 7 $i
