== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 12:05:03 (1776873903)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.53553 s, 18.9 MB/s
llite.lustre-ffffa071887ae000.read_ahead_stats=clear
llite.lustre-ffffa071887ae000.read_ahead_stats=
snapshot_time             1776873919.449866882 secs.nsecs
start_time                1776873910.821913923 secs.nsecs
elapsed_time              8.627952959 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          5 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=234937: Wed Apr 22 12:11:59 2026
  read: IOPS=12, BW=12.9MiB/s (13.5MB/s)(5120MiB/396921msec)
    clat (msec): min=43, max=227, avg=77.32, stdev=27.77
     lat (msec): min=43, max=227, avg=77.32, stdev=27.77
    clat percentiles (msec):
     |  1.00th=[   52],  5.00th=[   56], 10.00th=[   58], 20.00th=[   62],
     | 30.00th=[   64], 40.00th=[   66], 50.00th=[   68], 60.00th=[   70],
     | 70.00th=[   72], 80.00th=[   78], 90.00th=[  130], 95.00th=[  140],
     | 99.00th=[  174], 99.50th=[  190], 99.90th=[  211], 99.95th=[  222],
     | 99.99th=[  228]
   bw (  KiB/s): min= 2048, max=20480, per=100.00%, avg=13243.59, stdev=3899.37, samples=791
   iops        : min=    2, max=   20, avg=12.83, stdev= 3.82, samples=791
  lat (msec)   : 50=0.49%, 100=83.24%, 250=16.27%
  cpu          : usr=0.70%, sys=84.73%, ctx=13732, majf=5129, minf=1305859
  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=12.9MiB/s (13.5MB/s), 12.9MiB/s-12.9MiB/s (13.5MB/s-13.5MB/s), io=5120MiB (5369MB), run=396921-396921msec