| #!/bin/sh |
| |
| # flush memory and |
| # create lots of small continuous VMAs |
| |
| . ./hw_vars |
| |
| # vm_area_struct slab could consume a hell lot of memory for this small alloc test |
| # let's restrict it to 1/3 MemTotal |
| slab_mem_max=$((mem/3)) |
| # vm_area_struct is 192 bytes, 1 page could host 21 vm_area_struct |
| # below is a line from slabinfo, where it shows 1 slab has 2 pages and 42 objects in these 2 pages. |
| # vm_area_struct 58264 60816 192 42 2 : tunables 0 0 0 : slabdata 1448 1448 0 |
| vma_nr_max=$((21*slab_mem_max/4096)) |
| |
| size=$ROTATE_BYTES |
| unit_size=$((10 * pagesize)) |
| while [ $((size/unit_size)) -gt $vma_nr_max ] |
| do |
| size=$((size>>1)) |
| done |
