== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 14:40:29 (1771443629)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.00193 s, 17.5 MB/s
llite.lustre-ffffa01f789b7000.read_ahead_stats=clear
llite.lustre-ffffa01f789b7000.read_ahead_stats=
snapshot_time             1771443646.445033319 secs.nsecs
start_time                1771443637.059831254 secs.nsecs
elapsed_time              9.385202065 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          6 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=232304: Wed Feb 18 14:48:33 2026
  read: IOPS=11, BW=11.0MiB/s (11.6MB/s)(5120MiB/464299msec)
    clat (msec): min=52, max=259, avg=90.47, stdev=33.31
     lat (msec): min=52, max=259, avg=90.47, stdev=33.31
    clat percentiles (msec):
     |  1.00th=[   63],  5.00th=[   66], 10.00th=[   68], 20.00th=[   71],
     | 30.00th=[   73], 40.00th=[   74], 50.00th=[   77], 60.00th=[   80],
     | 70.00th=[   84], 80.00th=[   99], 90.00th=[  153], 95.00th=[  163],
     | 99.00th=[  205], 99.50th=[  218], 99.90th=[  232], 99.95th=[  241],
     | 99.99th=[  259]
   bw (  KiB/s): min= 2048, max=16384, per=100.00%, avg=11319.95, stdev=3437.28, samples=925
   iops        : min=    2, max=   16, avg=10.79, stdev= 3.40, samples=925
  lat (msec)   : 100=80.29%, 250=19.67%, 500=0.04%
  cpu          : usr=0.59%, sys=79.26%, ctx=14930, majf=5208, minf=1305779
  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=11.0MiB/s (11.6MB/s), 11.0MiB/s-11.0MiB/s (11.6MB/s-11.6MB/s), io=5120MiB (5369MB), run=464299-464299msec