== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:47:59 (1775879279)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.42956 s, 19.3 MB/s
llite.lustre-ffff906ef81c4000.read_ahead_stats=clear
llite.lustre-ffff906ef81c4000.read_ahead_stats=
snapshot_time             1775879292.893497191 secs.nsecs
start_time                1775879287.030273057 secs.nsecs
elapsed_time              5.863224134 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/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=293767: Fri Apr 10 23:54:35 2026
  read: IOPS=13, BW=13.5MiB/s (14.1MB/s)(5120MiB/380185msec)
    clat (msec): min=46, max=210, avg=74.09, stdev=28.17
     lat (msec): min=46, max=210, avg=74.09, stdev=28.17
    clat percentiles (msec):
     |  1.00th=[   50],  5.00th=[   55], 10.00th=[   56], 20.00th=[   58],
     | 30.00th=[   59], 40.00th=[   61], 50.00th=[   62], 60.00th=[   65],
     | 70.00th=[   69], 80.00th=[   78], 90.00th=[  131], 95.00th=[  138],
     | 99.00th=[  153], 99.50th=[  159], 99.90th=[  186], 99.95th=[  201],
     | 99.99th=[  211]
   bw (  KiB/s): min= 6119, max=20480, per=100.00%, avg=13830.72, stdev=4261.06, samples=758
   iops        : min=    5, max=   20, avg=13.51, stdev= 4.16, samples=758
  lat (msec)   : 50=1.31%, 100=81.86%, 250=16.84%
  cpu          : usr=0.70%, sys=88.70%, ctx=11330, 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=13.5MiB/s (14.1MB/s), 13.5MiB/s-13.5MiB/s (14.1MB/s-14.1MB/s), io=5120MiB (5369MB), run=380185-380185msec