== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 19:45:54 (1763340354)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.3404 s, 14.3 MB/s
llite.lustre-ffff8a488683b800.read_ahead_stats=clear
llite.lustre-ffff8a488683b800.read_ahead_stats=
snapshot_time             1763340377.255062277 secs.nsecs
start_time                1763340365.130510694 secs.nsecs
elapsed_time              12.124551583 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          78 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=227470: Sun Nov 16 19:55:27 2025
  read: IOPS=9, BW=9613KiB/s (9844kB/s)(5120MiB/545376msec)
    clat (msec): min=23, max=333, avg=106.06, stdev=34.08
     lat (msec): min=23, max=333, avg=106.06, stdev=34.08
    clat percentiles (msec):
     |  1.00th=[   65],  5.00th=[   71], 10.00th=[   75], 20.00th=[   81],
     | 30.00th=[   86], 40.00th=[   90], 50.00th=[   96], 60.00th=[  103],
     | 70.00th=[  113], 80.00th=[  128], 90.00th=[  157], 95.00th=[  176],
     | 99.00th=[  224], 99.50th=[  243], 99.90th=[  275], 99.95th=[  296],
     | 99.99th=[  334]
   bw (  KiB/s): min= 3744, max=16351, per=100.00%, avg=9665.34, stdev=2543.29, samples=1079
   iops        : min=    3, max=   15, avg= 8.84, stdev= 2.58, samples=1079
  lat (msec)   : 50=0.04%, 100=56.35%, 250=43.24%, 500=0.37%
  cpu          : usr=0.51%, sys=44.44%, ctx=21658, majf=7158, minf=1303829
  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=9613KiB/s (9844kB/s), 9613KiB/s-9613KiB/s (9844kB/s-9844kB/s), io=5120MiB (5369MB), run=545376-545376msec