== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:06:51 (1778292411)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.71769 s, 18.3 MB/s
llite.lustre-ffff911006567800.read_ahead_stats=clear
llite.lustre-ffff911006567800.read_ahead_stats=
snapshot_time             1778292426.993893774 secs.nsecs
start_time                1778292419.362466404 secs.nsecs
elapsed_time              7.631427370 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=230384: Fri May  8 22:13:37 2026
  read: IOPS=13, BW=13.2MiB/s (13.8MB/s)(5120MiB/388250msec)
    clat (msec): min=41, max=254, avg=75.67, stdev=31.47
     lat (msec): min=41, max=254, avg=75.67, stdev=31.47
    clat percentiles (msec):
     |  1.00th=[   50],  5.00th=[   53], 10.00th=[   55], 20.00th=[   58],
     | 30.00th=[   60], 40.00th=[   62], 50.00th=[   64], 60.00th=[   66],
     | 70.00th=[   69], 80.00th=[   78], 90.00th=[  129], 95.00th=[  140],
     | 99.00th=[  192], 99.50th=[  203], 99.90th=[  226], 99.95th=[  234],
     | 99.99th=[  255]
   bw (  KiB/s): min= 4079, max=20480, per=100.00%, avg=13544.32, stdev=4487.75, samples=774
   iops        : min=    3, max=   20, avg=13.21, stdev= 4.39, samples=774
  lat (msec)   : 50=1.68%, 100=79.88%, 250=18.42%, 500=0.02%
  cpu          : usr=0.65%, sys=88.26%, ctx=14040, majf=5120, minf=1305868
  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=13.2MiB/s (13.8MB/s), 13.2MiB/s-13.2MiB/s (13.8MB/s-13.8MB/s), io=5120MiB (5369MB), run=388250-388250msec