== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:01:54 (1763355714)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.09932 s, 14.8 MB/s
llite.lustre-ffff9f4ac807b800.read_ahead_stats=clear
llite.lustre-ffff9f4ac807b800.read_ahead_stats=
snapshot_time             1763355730.396100523 secs.nsecs
start_time                1763355723.675860324 secs.nsecs
elapsed_time              6.720240199 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=225065: Mon Nov 17 00:09:10 2025
  read: IOPS=12, BW=12.3MiB/s (12.9MB/s)(5120MiB/416951msec)
    clat (msec): min=37, max=253, avg=81.27, stdev=52.23
     lat (msec): min=37, max=253, avg=81.27, stdev=52.23
    clat percentiles (msec):
     |  1.00th=[   40],  5.00th=[   47], 10.00th=[   48], 20.00th=[   51],
     | 30.00th=[   53], 40.00th=[   55], 50.00th=[   58], 60.00th=[   63],
     | 70.00th=[   68], 80.00th=[  113], 90.00th=[  184], 95.00th=[  213],
     | 99.00th=[  239], 99.50th=[  243], 99.90th=[  249], 99.95th=[  251],
     | 99.99th=[  253]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=12605.74, stdev=6356.98, samples=831
   iops        : min=    4, max=   22, avg=12.30, stdev= 6.21, samples=831
  lat (msec)   : 50=20.00%, 100=57.73%, 250=22.21%, 500=0.06%
  cpu          : usr=0.64%, sys=87.10%, ctx=13834, majf=5130, minf=1305858
  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=12.3MiB/s (12.9MB/s), 12.3MiB/s-12.3MiB/s (12.9MB/s-12.9MB/s), io=5120MiB (5369MB), run=416951-416951msec