== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 16:36:36 (1778358996)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.21308 s, 14.5 MB/s
llite.lustre-ffff9336c85b7000.read_ahead_stats=clear
llite.lustre-ffff9336c85b7000.read_ahead_stats=
snapshot_time             1778359018.384305698 secs.nsecs
start_time                1778359005.974398046 secs.nsecs
elapsed_time              12.409907652 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=239181: Sat May  9 16:44:39 2026
  read: IOPS=11, BW=11.2MiB/s (11.7MB/s)(5120MiB/458681msec)
    clat (msec): min=51, max=246, avg=89.43, stdev=36.12
     lat (msec): min=51, max=246, avg=89.43, stdev=36.12
    clat percentiles (msec):
     |  1.00th=[   56],  5.00th=[   58], 10.00th=[   62], 20.00th=[   67],
     | 30.00th=[   71], 40.00th=[   74], 50.00th=[   80], 60.00th=[   83],
     | 70.00th=[   88], 80.00th=[   97], 90.00th=[  132], 95.00th=[  176],
     | 99.00th=[  222], 99.50th=[  230], 99.90th=[  239], 99.95th=[  239],
     | 99.99th=[  247]
   bw (  KiB/s): min= 4087, max=18432, per=100.00%, avg=11456.30, stdev=3598.32, samples=914
   iops        : min=    3, max=   18, avg=11.18, stdev= 3.52, samples=914
  lat (msec)   : 100=81.58%, 250=18.42%
  cpu          : usr=0.44%, sys=86.07%, ctx=13947, majf=5120, minf=1305866
  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=11.2MiB/s (11.7MB/s), 11.2MiB/s-11.2MiB/s (11.7MB/s-11.7MB/s), io=5120MiB (5369MB), run=458681-458681msec