== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:47:12 (1775879232)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.95035 s, 17.6 MB/s
llite.lustre-ffff8e02c58b4800.read_ahead_stats=clear
llite.lustre-ffff8e02c58b4800.read_ahead_stats=
snapshot_time             1775879246.911105688 secs.nsecs
start_time                1775879240.746695697 secs.nsecs
elapsed_time              6.164409991 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          4 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=293763: Fri Apr 10 23:54:19 2026
  read: IOPS=12, BW=12.5MiB/s (13.1MB/s)(5120MiB/409704msec)
    clat (msec): min=24, max=436, avg=79.80, stdev=25.73
     lat (msec): min=24, max=436, avg=79.80, stdev=25.73
    clat percentiles (msec):
     |  1.00th=[   56],  5.00th=[   61], 10.00th=[   63], 20.00th=[   65],
     | 30.00th=[   67], 40.00th=[   68], 50.00th=[   70], 60.00th=[   72],
     | 70.00th=[   75], 80.00th=[   83], 90.00th=[  131], 95.00th=[  138],
     | 99.00th=[  150], 99.50th=[  159], 99.90th=[  188], 99.95th=[  207],
     | 99.99th=[  439]
   bw (  KiB/s): min= 4079, max=18432, per=100.00%, avg=12849.24, stdev=3362.88, samples=815
   iops        : min=    3, max=   18, avg=12.33, stdev= 3.33, samples=815
  lat (msec)   : 50=0.08%, 100=82.97%, 250=16.93%, 500=0.02%
  cpu          : usr=0.63%, sys=82.89%, ctx=11879, majf=5174, minf=1305814
  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=12.5MiB/s (13.1MB/s), 12.5MiB/s-12.5MiB/s (13.1MB/s-13.1MB/s), io=5120MiB (5369MB), run=409704-409704msec