== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 17:46:59 (1775857619)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.99323 s, 10.5 MB/s
llite.lustre-ffff9e0ac3c11000.read_ahead_stats=clear
llite.lustre-ffff9e0ac3c11000.read_ahead_stats=
snapshot_time             1775857645.113427048 secs.nsecs
start_time                1775857633.965790665 secs.nsecs
elapsed_time              11.147636383 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          5 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=300464: Fri Apr 10 18:03:48 2026
  read: IOPS=5, BW=5371KiB/s (5500kB/s)(5120MiB/976215msec)
    clat (msec): min=33, max=745, avg=190.15, stdev=50.11
     lat (msec): min=33, max=745, avg=190.16, stdev=50.11
    clat percentiles (msec):
     |  1.00th=[  101],  5.00th=[  126], 10.00th=[  138], 20.00th=[  153],
     | 30.00th=[  163], 40.00th=[  174], 50.00th=[  184], 60.00th=[  194],
     | 70.00th=[  207], 80.00th=[  226], 90.00th=[  255], 95.00th=[  284],
     | 99.00th=[  338], 99.50th=[  363], 99.90th=[  498], 99.95th=[  527],
     | 99.99th=[  743]
   bw (  KiB/s): min= 1928, max=10240, per=100.00%, avg=5391.52, stdev=1382.00, samples=1932
   iops        : min=    1, max=   10, avg= 4.60, stdev= 1.43, samples=1932
  lat (msec)   : 50=0.06%, 100=0.96%, 250=87.83%, 500=11.05%, 750=0.10%
  cpu          : usr=0.30%, sys=31.29%, ctx=30974, majf=5478, minf=1305509
  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=5371KiB/s (5500kB/s), 5371KiB/s-5371KiB/s (5500kB/s-5500kB/s), io=5120MiB (5369MB), run=976215-976215msec