== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 17:10:16 (1775769016)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5321 s, 8.4 MB/s
llite.lustre-ffff9fa7d0f5c800.read_ahead_stats=clear
llite.lustre-ffff9fa7d0f5c800.read_ahead_stats=
snapshot_time             1775769060.988290656 secs.nsecs
start_time                1775769034.646799008 secs.nsecs
elapsed_time              26.341491648 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          12 samples [pages]
failed_to_reach_end       1 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=226078: Thu Apr  9 17:30:29 2026
  read: IOPS=4, BW=4515KiB/s (4623kB/s)(5120MiB/1161194msec)
    clat (msec): min=54, max=938, avg=226.28, stdev=71.53
     lat (msec): min=54, max=938, avg=226.29, stdev=71.53
    clat percentiles (msec):
     |  1.00th=[  106],  5.00th=[  136], 10.00th=[  153], 20.00th=[  174],
     | 30.00th=[  188], 40.00th=[  203], 50.00th=[  218], 60.00th=[  232],
     | 70.00th=[  249], 80.00th=[  271], 90.00th=[  305], 95.00th=[  347],
     | 99.00th=[  472], 99.50th=[  542], 99.90th=[  701], 99.95th=[  785],
     | 99.99th=[  936]
   bw (  KiB/s): min= 1280, max=10240, per=100.00%, avg=4548.54, stdev=1411.99, samples=2289
   iops        : min=    1, max=   10, avg= 3.73, stdev= 1.49, samples=2289
  lat (msec)   : 100=0.64%, 250=70.27%, 500=28.38%, 750=0.62%, 1000=0.08%
  cpu          : usr=0.30%, sys=27.49%, ctx=36598, majf=5605, minf=1305383
  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=4515KiB/s (4623kB/s), 4515KiB/s-4515KiB/s (4623kB/s-4623kB/s), io=5120MiB (5369MB), run=1161194-1161194msec