== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 20:20:28 (1763342428)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.11589 s, 11.5 MB/s
llite.lustre-ffff8d8205078800.read_ahead_stats=clear
llite.lustre-ffff8d8205078800.read_ahead_stats=
snapshot_time             1763342457.198217533 secs.nsecs
start_time                1763342441.918959364 secs.nsecs
elapsed_time              15.279258169 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          103 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=226969: Sun Nov 16 20:31:35 2025
  read: IOPS=8, BW=8301KiB/s (8500kB/s)(5120MiB/631611msec)
    clat (msec): min=15, max=331, avg=122.85, stdev=37.55
     lat (msec): min=15, max=331, avg=122.85, stdev=37.55
    clat percentiles (msec):
     |  1.00th=[   72],  5.00th=[   80], 10.00th=[   86], 20.00th=[   92],
     | 30.00th=[  100], 40.00th=[  106], 50.00th=[  114], 60.00th=[  123],
     | 70.00th=[  136], 80.00th=[  150], 90.00th=[  176], 95.00th=[  197],
     | 99.00th=[  247], 99.50th=[  266], 99.90th=[  309], 99.95th=[  313],
     | 99.99th=[  334]
   bw (  KiB/s): min= 2019, max=14336, per=100.00%, avg=8337.62, stdev=2111.67, samples=1248
   iops        : min=    1, max=   14, avg= 7.51, stdev= 2.14, samples=1248
  lat (msec)   : 20=0.02%, 50=0.04%, 100=31.93%, 250=67.11%, 500=0.90%
  cpu          : usr=0.45%, sys=37.50%, ctx=24140, majf=7779, minf=1303208
  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=8301KiB/s (8500kB/s), 8301KiB/s-8301KiB/s (8500kB/s-8500kB/s), io=5120MiB (5369MB), run=631611-631611msec