== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:30:46 (1763346646)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.0957 s, 10.4 MB/s
llite.lustre-ffffa0659d775000.read_ahead_stats=clear
llite.lustre-ffffa0659d775000.read_ahead_stats=
snapshot_time             1763346672.027033151 secs.nsecs
start_time                1763346661.973148084 secs.nsecs
elapsed_time              10.053885067 secs.nsecs
hits                      25568 samples [pages]
misses                    32 samples [pages]
zero_size_window          10 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       35 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           36 samples [pages] 8 4096 25568
/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=293223: Sun Nov 16 21:37:48 2025
  read: IOPS=13, BW=13.2MiB/s (13.8MB/s)(5120MiB/388376msec)
    clat (msec): min=15, max=2775, avg=75.47, stdev=135.49
     lat (msec): min=15, max=2775, avg=75.47, stdev=135.49
    clat percentiles (msec):
     |  1.00th=[   22],  5.00th=[   28], 10.00th=[   34], 20.00th=[   41],
     | 30.00th=[   47], 40.00th=[   54], 50.00th=[   60], 60.00th=[   68],
     | 70.00th=[   77], 80.00th=[   88], 90.00th=[  108], 95.00th=[  129],
     | 99.00th=[  205], 99.50th=[  844], 99.90th=[ 2232], 99.95th=[ 2500],
     | 99.99th=[ 2769]
   bw (  KiB/s): min= 2035, max=30176, per=100.00%, avg=14939.01, stdev=4810.80, samples=684
   iops        : min=    1, max=   29, avg=13.96, stdev= 4.75, samples=684
  lat (msec)   : 20=0.74%, 50=34.55%, 100=51.93%, 250=11.99%, 500=0.25%
  lat (msec)   : 1000=0.04%, 2000=0.29%, >=2000=0.20%
  cpu          : usr=0.74%, sys=42.31%, ctx=27865, majf=302, minf=1310687
  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=13.2MiB/s (13.8MB/s), 13.2MiB/s-13.2MiB/s (13.8MB/s-13.8MB/s), io=5120MiB (5369MB), run=388376-388376msec