== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:33:18 (1768012398)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.21536 s, 16.9 MB/s
llite.lustre-ffff934fc5682000.read_ahead_stats=clear
llite.lustre-ffff934fc5682000.read_ahead_stats=
snapshot_time             1768012416.572799597 secs.nsecs
start_time                1768012406.462202758 secs.nsecs
elapsed_time              10.110596839 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=229452: Fri Jan  9 21:39:57 2026
  read: IOPS=13, BW=13.5MiB/s (14.2MB/s)(5120MiB/377983msec)
    clat (msec): min=37, max=230, avg=73.66, stdev=29.41
     lat (msec): min=37, max=230, avg=73.66, stdev=29.41
    clat percentiles (msec):
     |  1.00th=[   44],  5.00th=[   47], 10.00th=[   48], 20.00th=[   51],
     | 30.00th=[   55], 40.00th=[   58], 50.00th=[   64], 60.00th=[   69],
     | 70.00th=[   78], 80.00th=[  106], 90.00th=[  115], 95.00th=[  121],
     | 99.00th=[  201], 99.50th=[  211], 99.90th=[  226], 99.95th=[  228],
     | 99.99th=[  230]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=13903.23, stdev=4667.18, samples=753
   iops        : min=    4, max=   22, avg=13.57, stdev= 4.56, samples=753
  lat (msec)   : 50=17.11%, 100=60.49%, 250=22.40%
  cpu          : usr=0.70%, sys=85.88%, ctx=13782, majf=5125, 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=13.5MiB/s (14.2MB/s), 13.5MiB/s-13.5MiB/s (14.2MB/s-14.2MB/s), io=5120MiB (5369MB), run=377983-377983msec