== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:15:18 (1773108918)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.44594 s, 16.3 MB/s
llite.lustre-ffff8ebc4c7ec000.read_ahead_stats=clear
llite.lustre-ffff8ebc4c7ec000.read_ahead_stats=
snapshot_time             1773108933.825236964 secs.nsecs
start_time                1773108926.352947693 secs.nsecs
elapsed_time              7.472289271 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=293799: Mon Mar  9 22:23:07 2026
  read: IOPS=11, BW=11.4MiB/s (11.9MB/s)(5120MiB/450570msec)
    clat (msec): min=45, max=301, avg=87.82, stdev=38.25
     lat (msec): min=45, max=301, avg=87.82, stdev=38.25
    clat percentiles (msec):
     |  1.00th=[   53],  5.00th=[   60], 10.00th=[   62], 20.00th=[   65],
     | 30.00th=[   68], 40.00th=[   70], 50.00th=[   73], 60.00th=[   77],
     | 70.00th=[   81], 80.00th=[   90], 90.00th=[  159], 95.00th=[  171],
     | 99.00th=[  220], 99.50th=[  239], 99.90th=[  279], 99.95th=[  284],
     | 99.99th=[  300]
   bw (  KiB/s): min= 4087, max=20480, per=100.00%, avg=11671.08, stdev=4035.69, samples=898
   iops        : min=    3, max=   20, avg=11.39, stdev= 3.95, samples=898
  lat (msec)   : 50=0.16%, 100=81.48%, 250=18.05%, 500=0.31%
  cpu          : usr=0.59%, sys=87.46%, ctx=11801, 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=11.4MiB/s (11.9MB/s), 11.4MiB/s-11.4MiB/s (11.9MB/s-11.9MB/s), io=5120MiB (5369MB), run=450570-450570msec