diff options
| author | Aaron Lu <aaron.lu@intel.com> | 2018-03-26 13:13:07 +0800 |
|---|---|---|
| committer | Fengguang Wu <fengguang.wu@intel.com> | 2018-03-28 19:33:56 +0800 |
| commit | 8214cd45d08363646364ce502671daedae1ddf36 (patch) | |
| tree | 0088f6ba9cdad6aeed1602f0935d7d4edc454e58 | |
| parent | f95df6b630cdf22108bab5859ce9a86ad5924516 (diff) | |
| download | vm-scalability-8214cd45d08363646364ce502671daedae1ddf36.tar.gz | |
case-shm-pread: use unit_size to control working set
For multi-threaded case, when it needs to exit, these threads will
need to free their memories. Due to the global mmap_sem, the free
has to be done one by one in serial mode. On large servers, due to
the high number of CPU, the free can take more than 1 hour.
To avoid this problem, limit the workingset by letting user to
specify the size. The non-mt case does not need this but it doesn't
hurt(the default size keeps the same as before if unit_size isn't
specified).
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
| -rwxr-xr-x | case-shm-pread-rand | 3 | ||||
| -rwxr-xr-x | case-shm-pread-rand-mt | 3 | ||||
| -rwxr-xr-x | case-shm-pread-seq | 3 | ||||
| -rwxr-xr-x | case-shm-pread-seq-mt | 3 |
4 files changed, 8 insertions, 4 deletions
diff --git a/case-shm-pread-rand b/case-shm-pread-rand index c11eab5..ee61868 100755 --- a/case-shm-pread-rand +++ b/case-shm-pread-rand @@ -4,6 +4,7 @@ create_sparse_file $SHM_FILE $shm_size -$USEMEM -n $nr_task -f $SHM_FILE --readonly --random $((shm_size / 2)) +[ -n "$unit_size" ] || unit_size=$((shm_size / 2)) +$USEMEM -n $nr_task -f $SHM_FILE --readonly --random $unit_size rm $SHM_FILE diff --git a/case-shm-pread-rand-mt b/case-shm-pread-rand-mt index ec9e8d6..4d3862e 100755 --- a/case-shm-pread-rand-mt +++ b/case-shm-pread-rand-mt @@ -4,6 +4,7 @@ create_sparse_file $SHM_FILE $shm_size -$USEMEM -t $nr_task -f $SHM_FILE --readonly --random $((shm_size / 2)) +[ -n "$unit_size" ] || unit_size=$((shm_size / 2)) +$USEMEM -t $nr_task -f $SHM_FILE --readonly --random $unit_size rm $SHM_FILE diff --git a/case-shm-pread-seq b/case-shm-pread-seq index 0107693..8380551 100755 --- a/case-shm-pread-seq +++ b/case-shm-pread-seq @@ -4,6 +4,7 @@ create_sparse_file $SHM_FILE $shm_size -$USEMEM -n $nr_task -f $SHM_FILE --readonly $((shm_size / 2)) +[ -n "$unit_size" ] || unit_size=$((shm_size / 2)) +$USEMEM -n $nr_task -f $SHM_FILE --readonly $unit_size rm $SHM_FILE diff --git a/case-shm-pread-seq-mt b/case-shm-pread-seq-mt index 8ce7f1f..3016dae 100755 --- a/case-shm-pread-seq-mt +++ b/case-shm-pread-seq-mt @@ -4,6 +4,7 @@ create_sparse_file $SHM_FILE $shm_size -$USEMEM -t $nr_task -f $SHM_FILE --readonly $((shm_size / 2)) +[ -n "$unit_size" ] || unit_size=$((shm_size / 2)) +$USEMEM -t $nr_task -f $SHM_FILE --readonly $unit_size rm $SHM_FILE |