== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 01:42:22 (1763880142)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.3739 s, 19.5 MB/s
llite.lustre-ffff95fba0b8c000.read_ahead_stats=clear
llite.lustre-ffff95fba0b8c000.read_ahead_stats=
snapshot_time             1763880155.799756497 secs.nsecs
start_time                1763880149.646203490 secs.nsecs
elapsed_time              6.153553007 secs.nsecs
hits                      25500 samples [pages]
misses                    100 samples [pages]
readpage_not_consecutive  100 samples [pages]
failed_to_fast_read       100 samples [pages]
mmap_range_read           100 samples [pages]
readahead_pages           100 samples [pages] 255 255 25500
/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=237648: Sun Nov 23 01:48:53 2025
  read: IOPS=13, BW=13.6MiB/s (14.3MB/s)(5120MiB/375113msec)
    clat (msec): min=37, max=273, avg=73.11, stdev=27.54
     lat (msec): min=37, max=273, avg=73.11, stdev=27.54
    clat percentiles (msec):
     |  1.00th=[   40],  5.00th=[   46], 10.00th=[   47], 20.00th=[   51],
     | 30.00th=[   55], 40.00th=[   60], 50.00th=[   65], 60.00th=[   69],
     | 70.00th=[   79], 80.00th=[  107], 90.00th=[  113], 95.00th=[  118],
     | 99.00th=[  148], 99.50th=[  197], 99.90th=[  226], 99.95th=[  239],
     | 99.99th=[  275]
   bw (  KiB/s): min= 4096, max=26624, per=100.00%, avg=14023.06, stdev=4573.47, samples=747
   iops        : min=    4, max=   26, avg=13.68, stdev= 4.46, samples=747
  lat (msec)   : 50=20.04%, 100=56.15%, 250=23.79%, 500=0.02%
  cpu          : usr=0.60%, sys=85.57%, ctx=13575, 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=13.6MiB/s (14.3MB/s), 13.6MiB/s-13.6MiB/s (14.3MB/s-14.3MB/s), io=5120MiB (5369MB), run=375113-375113msec