== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 03:57:56 (1775203076)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.5412 s, 6.7 MB/s
llite.lustre-ffff9f01d14ee800.read_ahead_stats=clear
llite.lustre-ffff9f01d14ee800.read_ahead_stats=
snapshot_time             1775203129.747549216 secs.nsecs
start_time                1775203099.987610949 secs.nsecs
elapsed_time              29.759938267 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          26 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=227204: Fri Apr  3 04:17:50 2026
  read: IOPS=4, BW=4634KiB/s (4746kB/s)(5120MiB/1131319msec)
    clat (msec): min=79, max=555, avg=220.38, stdev=53.81
     lat (msec): min=79, max=555, avg=220.39, stdev=53.81
    clat percentiles (msec):
     |  1.00th=[  112],  5.00th=[  138], 10.00th=[  157], 20.00th=[  176],
     | 30.00th=[  190], 40.00th=[  203], 50.00th=[  218], 60.00th=[  230],
     | 70.00th=[  245], 80.00th=[  262], 90.00th=[  292], 95.00th=[  313],
     | 99.00th=[  368], 99.50th=[  388], 99.90th=[  443], 99.95th=[  472],
     | 99.99th=[  558]
   bw (  KiB/s): min= 1932, max=10240, per=100.00%, avg=4651.80, stdev=1277.47, samples=2237
   iops        : min=    1, max=   10, avg= 3.84, stdev= 1.34, samples=2237
  lat (msec)   : 100=0.53%, 250=72.99%, 500=26.45%, 750=0.04%
  cpu          : usr=0.28%, sys=26.56%, ctx=37704, majf=5556, minf=1305431
  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=4634KiB/s (4746kB/s), 4634KiB/s-4634KiB/s (4746kB/s-4746kB/s), io=5120MiB (5369MB), run=1131319-1131319msec