== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:20:03 (1775877603)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.56778 s, 18.8 MB/s
llite.lustre-ffff94b9885da000.read_ahead_stats=clear
llite.lustre-ffff94b9885da000.read_ahead_stats=
snapshot_time             1775877618.754269839 secs.nsecs
start_time                1775877610.861420997 secs.nsecs
elapsed_time              7.892848842 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 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=228645: Fri Apr 10 23:27:12 2026
  read: IOPS=12, BW=12.5MiB/s (13.1MB/s)(5120MiB/410943msec)
    clat (msec): min=42, max=249, avg=80.07, stdev=35.23
     lat (msec): min=42, max=249, avg=80.07, stdev=35.23
    clat percentiles (msec):
     |  1.00th=[   52],  5.00th=[   55], 10.00th=[   57], 20.00th=[   60],
     | 30.00th=[   62], 40.00th=[   64], 50.00th=[   67], 60.00th=[   69],
     | 70.00th=[   73], 80.00th=[   85], 90.00th=[  136], 95.00th=[  165],
     | 99.00th=[  205], 99.50th=[  218], 99.90th=[  236], 99.95th=[  239],
     | 99.99th=[  251]
   bw (  KiB/s): min= 4071, max=20480, per=100.00%, avg=12794.73, stdev=4437.96, samples=819
   iops        : min=    3, max=   20, avg=12.41, stdev= 4.38, samples=819
  lat (msec)   : 50=0.55%, 100=81.52%, 250=17.93%
  cpu          : usr=0.67%, sys=84.59%, ctx=14133, majf=5134, minf=1305854
  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=410943-410943msec