== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 07:59:46 (1768309186)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.7643 s, 8.9 MB/s
llite.lustre-ffff9dbf905be800.read_ahead_stats=clear
llite.lustre-ffff9dbf905be800.read_ahead_stats=
snapshot_time             1768309222.221406800 secs.nsecs
start_time                1768309203.696573184 secs.nsecs
elapsed_time              18.524833616 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          40 samples [pages]
failed_to_reach_end       2 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=223998: Tue Jan 13 08:16:14 2026
  read: IOPS=5, BW=5559KiB/s (5692kB/s)(5120MiB/943187msec)
    clat (msec): min=59, max=487, avg=183.59, stdev=53.85
     lat (msec): min=59, max=487, avg=183.60, stdev=53.85
    clat percentiles (msec):
     |  1.00th=[   92],  5.00th=[  108], 10.00th=[  120], 20.00th=[  136],
     | 30.00th=[  153], 40.00th=[  165], 50.00th=[  178], 60.00th=[  192],
     | 70.00th=[  207], 80.00th=[  226], 90.00th=[  255], 95.00th=[  279],
     | 99.00th=[  334], 99.50th=[  363], 99.90th=[  405], 99.95th=[  435],
     | 99.99th=[  489]
   bw (  KiB/s): min= 1973, max=10240, per=100.00%, avg=5583.74, stdev=1603.59, samples=1861
   iops        : min=    1, max=   10, avg= 4.71, stdev= 1.65, samples=1861
  lat (msec)   : 100=2.50%, 250=86.52%, 500=10.98%
  cpu          : usr=0.30%, sys=22.95%, ctx=32666, majf=6686, minf=1304300
  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=5559KiB/s (5692kB/s), 5559KiB/s-5559KiB/s (5692kB/s-5692kB/s), io=5120MiB (5369MB), run=943187-943187msec