== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:38:40 (1769081920)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.59432 s, 18.7 MB/s
llite.lustre-ffff8c03b479f800.read_ahead_stats=clear
llite.lustre-ffff8c03b479f800.read_ahead_stats=
snapshot_time             1769081934.081348886 secs.nsecs
start_time                1769081927.526866821 secs.nsecs
elapsed_time              6.554482065 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          6 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=225094: Thu Jan 22 06:44:35 2026
  read: IOPS=15, BW=15.1MiB/s (15.9MB/s)(5120MiB/338572msec)
    clat (msec): min=10, max=185, avg=65.94, stdev=25.28
     lat (msec): min=10, max=185, avg=65.94, stdev=25.28
    clat percentiles (msec):
     |  1.00th=[   41],  5.00th=[   46], 10.00th=[   48], 20.00th=[   50],
     | 30.00th=[   52], 40.00th=[   53], 50.00th=[   55], 60.00th=[   56],
     | 70.00th=[   59], 80.00th=[  103], 90.00th=[  112], 95.00th=[  116],
     | 99.00th=[  125], 99.50th=[  129], 99.90th=[  146], 99.95th=[  167],
     | 99.99th=[  186]
   bw (  KiB/s): min= 6144, max=22528, per=100.00%, avg=15526.76, stdev=5136.69, samples=674
   iops        : min=    6, max=   22, avg=15.09, stdev= 5.01, samples=674
  lat (msec)   : 20=0.02%, 50=21.58%, 100=56.97%, 250=21.43%
  cpu          : usr=0.70%, sys=84.60%, ctx=13242, majf=5159, minf=1305828
  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=15.1MiB/s (15.9MB/s), 15.1MiB/s-15.1MiB/s (15.9MB/s-15.9MB/s), io=5120MiB (5369MB), run=338572-338572msec