== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 03:43:22 (1772181802)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.48783 s, 16.2 MB/s
llite.lustre-ffff9f1dc01aa000.read_ahead_stats=clear
llite.lustre-ffff9f1dc01aa000.read_ahead_stats=
snapshot_time             1772181824.091420574 secs.nsecs
start_time                1772181811.677163820 secs.nsecs
elapsed_time              12.414256754 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          12 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=225865: Fri Feb 27 03:56:00 2026
  read: IOPS=6, BW=7154KiB/s (7325kB/s)(5120MiB/732892msec)
    clat (msec): min=46, max=1204, avg=142.84, stdev=59.40
     lat (msec): min=46, max=1204, avg=142.84, stdev=59.40
    clat percentiles (msec):
     |  1.00th=[   70],  5.00th=[   78], 10.00th=[   84], 20.00th=[   94],
     | 30.00th=[  105], 40.00th=[  117], 50.00th=[  131], 60.00th=[  144],
     | 70.00th=[  161], 80.00th=[  182], 90.00th=[  218], 95.00th=[  249],
     | 99.00th=[  351], 99.50th=[  372], 99.90th=[  435], 99.95th=[  527],
     | 99.99th=[ 1200]
   bw (  KiB/s): min= 1954, max=14336, per=100.00%, avg=7187.87, stdev=2654.00, samples=1450
   iops        : min=    1, max=   14, avg= 6.43, stdev= 2.72, samples=1450
  lat (msec)   : 50=0.02%, 100=25.39%, 250=69.65%, 500=4.88%, 750=0.04%
  lat (msec)   : 2000=0.02%
  cpu          : usr=0.40%, sys=40.98%, ctx=25594, majf=5476, minf=1305513
  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=7154KiB/s (7325kB/s), 7154KiB/s-7154KiB/s (7325kB/s-7325kB/s), io=5120MiB (5369MB), run=732892-732892msec