== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 18:16:20 (1764112580)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.93801 s, 15.1 MB/s
llite.lustre-ffff89dc4018a800.read_ahead_stats=clear
llite.lustre-ffff89dc4018a800.read_ahead_stats=
snapshot_time             1764112595.204449678 secs.nsecs
start_time                1764112589.794104082 secs.nsecs
elapsed_time              5.410345596 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/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=300979: Tue Nov 25 18:22:14 2025
  read: IOPS=15, BW=15.2MiB/s (15.0MB/s)(5120MiB/336239msec)
    clat (msec): min=15, max=3257, avg=65.47, stdev=97.82
     lat (msec): min=15, max=3257, avg=65.47, stdev=97.82
    clat percentiles (msec):
     |  1.00th=[   22],  5.00th=[   35], 10.00th=[   40], 20.00th=[   47],
     | 30.00th=[   50], 40.00th=[   53], 50.00th=[   54], 60.00th=[   57],
     | 70.00th=[   60], 80.00th=[   65], 90.00th=[   92], 95.00th=[  115],
     | 99.00th=[  176], 99.50th=[  498], 99.90th=[ 1502], 99.95th=[ 1636],
     | 99.99th=[ 3272]
   bw (  KiB/s): min= 2043, max=34816, per=100.00%, avg=16439.20, stdev=5347.13, samples=628
   iops        : min=    1, max=   34, avg=15.80, stdev= 5.26, samples=628
  lat (msec)   : 20=0.82%, 50=31.05%, 100=59.67%, 250=7.83%, 500=0.14%
  lat (msec)   : 750=0.16%, 2000=0.29%, >=2000=0.04%
  cpu          : usr=0.78%, sys=72.51%, ctx=17528, majf=2354, minf=1308636
  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=15.2MiB/s (15.0MB/s), 15.2MiB/s-15.2MiB/s (15.0MB/s-15.0MB/s), io=5120MiB (5369MB), run=336239-336239msec