== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:14:04 (1775877244)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.06939 s, 20.7 MB/s
llite.lustre-ffff9d67d5cbf800.read_ahead_stats=clear
llite.lustre-ffff9d67d5cbf800.read_ahead_stats=
snapshot_time             1775877257.039130073 secs.nsecs
start_time                1775877251.170859829 secs.nsecs
elapsed_time              5.868270244 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=294793: Fri Apr 10 23:20:47 2026
  read: IOPS=13, BW=13.2MiB/s (13.9MB/s)(5120MiB/387334msec)
    clat (msec): min=31, max=258, avg=75.47, stdev=28.48
     lat (msec): min=31, max=258, avg=75.47, stdev=28.48
    clat percentiles (msec):
     |  1.00th=[   50],  5.00th=[   54], 10.00th=[   56], 20.00th=[   59],
     | 30.00th=[   62], 40.00th=[   64], 50.00th=[   66], 60.00th=[   68],
     | 70.00th=[   70], 80.00th=[   75], 90.00th=[  128], 95.00th=[  138],
     | 99.00th=[  184], 99.50th=[  194], 99.90th=[  207], 99.95th=[  211],
     | 99.99th=[  259]
   bw (  KiB/s): min= 4079, max=20480, per=100.00%, avg=13574.74, stdev=4081.27, samples=772
   iops        : min=    3, max=   20, avg=13.19, stdev= 4.02, samples=772
  lat (msec)   : 50=1.11%, 100=82.32%, 250=16.54%, 500=0.02%
  cpu          : usr=0.67%, sys=85.91%, ctx=11471, majf=5137, minf=1305852
  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 (13.9MB/s), 13.2MiB/s-13.2MiB/s (13.9MB/s-13.9MB/s), io=5120MiB (5369MB), run=387334-387334msec