== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:36:02 (1763350562)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.94585 s, 10.5 MB/s
llite.lustre-ffff905d905be000.read_ahead_stats=clear
llite.lustre-ffff905d905be000.read_ahead_stats=
snapshot_time             1763350596.151378819 secs.nsecs
start_time                1763350576.757831609 secs.nsecs
elapsed_time              19.393547210 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          111 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=225392: Sun Nov 16 22:48:30 2025
  read: IOPS=7, BW=7414KiB/s (7592kB/s)(5120MiB/707191msec)
    clat (msec): min=28, max=434, avg=137.56, stdev=42.17
     lat (msec): min=28, max=434, avg=137.56, stdev=42.17
    clat percentiles (msec):
     |  1.00th=[   73],  5.00th=[   85], 10.00th=[   91], 20.00th=[  102],
     | 30.00th=[  111], 40.00th=[  121], 50.00th=[  131], 60.00th=[  142],
     | 70.00th=[  155], 80.00th=[  171], 90.00th=[  197], 95.00th=[  218],
     | 99.00th=[  259], 99.50th=[  279], 99.90th=[  338], 99.95th=[  376],
     | 99.99th=[  435]
   bw (  KiB/s): min= 2011, max=12288, per=100.00%, avg=7451.65, stdev=1919.44, samples=1395
   iops        : min=    1, max=   12, avg= 6.60, stdev= 1.97, samples=1395
  lat (msec)   : 50=0.14%, 100=19.04%, 250=79.49%, 500=1.33%
  cpu          : usr=0.38%, sys=32.03%, ctx=26242, majf=7366, minf=1303623
  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=7414KiB/s (7592kB/s), 7414KiB/s-7414KiB/s (7592kB/s-7592kB/s), io=5120MiB (5369MB), run=707191-707191msec