== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 19:42:05 (1763340125)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.52365 s, 11.0 MB/s
llite.lustre-ffff8ad7d9661800.read_ahead_stats=clear
llite.lustre-ffff8ad7d9661800.read_ahead_stats=
snapshot_time             1763340153.710143707 secs.nsecs
start_time                1763340139.242207434 secs.nsecs
elapsed_time              14.467936273 secs.nsecs
hits                      25371 samples [pages]
misses                    229 samples [pages]
zero_size_window          78 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       229 samples [pages]
mmap_range_read           224 samples [pages]
readahead_pages           225 samples [pages] 8 128 25371
/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=225337: Sun Nov 16 19:53:34 2025
  read: IOPS=7, BW=8003KiB/s (8195kB/s)(5120MiB/655145msec)
    clat (msec): min=23, max=414, avg=127.53, stdev=39.08
     lat (msec): min=23, max=414, avg=127.53, stdev=39.08
    clat percentiles (msec):
     |  1.00th=[   71],  5.00th=[   81], 10.00th=[   87], 20.00th=[   95],
     | 30.00th=[  103], 40.00th=[  111], 50.00th=[  120], 60.00th=[  130],
     | 70.00th=[  142], 80.00th=[  157], 90.00th=[  182], 95.00th=[  203],
     | 99.00th=[  251], 99.50th=[  275], 99.90th=[  309], 99.95th=[  326],
     | 99.99th=[  414]
   bw (  KiB/s): min= 2019, max=14336, per=100.00%, avg=8037.10, stdev=2026.38, samples=1294
   iops        : min=    1, max=   14, avg= 7.18, stdev= 2.04, samples=1294
  lat (msec)   : 50=0.12%, 100=27.05%, 250=71.80%, 500=1.04%
  cpu          : usr=0.39%, sys=34.86%, ctx=25548, majf=7587, minf=1303402
  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=8003KiB/s (8195kB/s), 8003KiB/s-8003KiB/s (8195kB/s-8195kB/s), io=5120MiB (5369MB), run=655145-655145msec