== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:07:33 (1764738453)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.1438 s, 17.1 MB/s
llite.lustre-ffff959f10317800.read_ahead_stats=clear
llite.lustre-ffff959f10317800.read_ahead_stats=
snapshot_time             1764738468.698550786 secs.nsecs
start_time                1764738461.239842870 secs.nsecs
elapsed_time              7.458707916 secs.nsecs
hits                      25166 samples [pages]
misses                    434 samples [pages]
failed_grab_cache_page    17 samples [pages]
zero_size_window          3 samples [pages]
failed_to_reach_end       414 samples [pages]
failed_to_fast_read       434 samples [pages]
mmap_range_read           332 samples [pages]
readahead_pages           116 samples [pages] 8 254 25166
/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=239346: Wed Dec  3 00:14:14 2025
  read: IOPS=13, BW=13.4MiB/s (14.0MB/s)(5120MiB/382505msec)
    clat (msec): min=34, max=209, avg=74.50, stdev=36.60
     lat (msec): min=34, max=209, avg=74.50, stdev=36.60
    clat percentiles (msec):
     |  1.00th=[   43],  5.00th=[   47], 10.00th=[   49], 20.00th=[   52],
     | 30.00th=[   54], 40.00th=[   56], 50.00th=[   58], 60.00th=[   61],
     | 70.00th=[   65], 80.00th=[  111], 90.00th=[  138], 95.00th=[  163],
     | 99.00th=[  178], 99.50th=[  184], 99.90th=[  192], 99.95th=[  194],
     | 99.99th=[  211]
   bw (  KiB/s): min= 4087, max=22528, per=100.00%, avg=13742.88, stdev=5578.42, samples=762
   iops        : min=    3, max=   22, avg=13.37, stdev= 5.48, samples=762
  lat (msec)   : 50=14.49%, 100=63.16%, 250=22.34%
  cpu          : usr=0.74%, sys=85.12%, ctx=13499, majf=5124, minf=1305863
  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=13.4MiB/s (14.0MB/s), 13.4MiB/s-13.4MiB/s (14.0MB/s-14.0MB/s), io=5120MiB (5369MB), run=382505-382505msec