== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:11:55 (1763356315)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.27004 s, 16.7 MB/s
llite.lustre-ffff914f58c24800.read_ahead_stats=clear
llite.lustre-ffff914f58c24800.read_ahead_stats=
snapshot_time             1763356328.683359926 secs.nsecs
start_time                1763356323.556708349 secs.nsecs
elapsed_time              5.126651577 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=293488: Mon Nov 17 00:18:29 2025
  read: IOPS=13, BW=13.5MiB/s (14.2MB/s)(5120MiB/378507msec)
    clat (msec): min=34, max=246, avg=73.75, stdev=37.81
     lat (msec): min=34, max=246, avg=73.75, stdev=37.81
    clat percentiles (msec):
     |  1.00th=[   41],  5.00th=[   45], 10.00th=[   48], 20.00th=[   51],
     | 30.00th=[   53], 40.00th=[   55], 50.00th=[   57], 60.00th=[   60],
     | 70.00th=[   65], 80.00th=[  109], 90.00th=[  126], 95.00th=[  157],
     | 99.00th=[  205], 99.50th=[  218], 99.90th=[  234], 99.95th=[  243],
     | 99.99th=[  247]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=13887.75, stdev=5783.47, samples=754
   iops        : min=    4, max=   22, avg=13.56, stdev= 5.65, samples=754
  lat (msec)   : 50=18.81%, 100=57.79%, 250=23.40%
  cpu          : usr=0.68%, sys=84.73%, ctx=11581, majf=5121, minf=1305867
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=13.5MiB/s (14.2MB/s), 13.5MiB/s-13.5MiB/s (14.2MB/s-14.2MB/s), io=5120MiB (5369MB), run=378507-378507msec