== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 16:54:15 (1775854455)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.0962 s, 8.7 MB/s
llite.lustre-ffff944ccbcdf800.read_ahead_stats=clear
llite.lustre-ffff944ccbcdf800.read_ahead_stats=
snapshot_time             1775854496.834874653 secs.nsecs
start_time                1775854473.026387671 secs.nsecs
elapsed_time              23.808486982 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          11 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=235309: Fri Apr 10 17:13:02 2026
  read: IOPS=4, BW=4861KiB/s (4977kB/s)(5120MiB/1078626msec)
    clat (msec): min=80, max=472, avg=210.12, stdev=49.79
     lat (msec): min=80, max=472, avg=210.13, stdev=49.79
    clat percentiles (msec):
     |  1.00th=[  111],  5.00th=[  136], 10.00th=[  150], 20.00th=[  167],
     | 30.00th=[  182], 40.00th=[  194], 50.00th=[  207], 60.00th=[  222],
     | 70.00th=[  234], 80.00th=[  251], 90.00th=[  275], 95.00th=[  296],
     | 99.00th=[  342], 99.50th=[  355], 99.90th=[  401], 99.95th=[  464],
     | 99.99th=[  472]
   bw (  KiB/s): min= 1954, max= 8192, per=100.00%, avg=4877.85, stdev=1277.34, samples=2135
   iops        : min=    1, max=    8, avg= 4.08, stdev= 1.35, samples=2135
  lat (msec)   : 100=0.45%, 250=79.63%, 500=19.92%
  cpu          : usr=0.28%, sys=28.38%, ctx=35814, majf=5536, minf=1305452
  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=4861KiB/s (4977kB/s), 4861KiB/s-4861KiB/s (4977kB/s-4977kB/s), io=5120MiB (5369MB), run=1078626-1078626msec