== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 15:54:42 (1763412882)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.693 s, 10.8 MB/s
llite.lustre-ffff97e099245000.read_ahead_stats=clear
llite.lustre-ffff97e099245000.read_ahead_stats=
snapshot_time             1763412904.571848773 secs.nsecs
start_time                1763412896.209858209 secs.nsecs
elapsed_time              8.361990564 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          11 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=291616: Mon Nov 17 16:01:24 2025
  read: IOPS=13, BW=13.7MiB/s (14.4MB/s)(5120MiB/373956msec)
    clat (msec): min=16, max=2806, avg=72.52, stdev=132.15
     lat (msec): min=16, max=2806, avg=72.53, stdev=132.15
    clat percentiles (msec):
     |  1.00th=[   22],  5.00th=[   29], 10.00th=[   34], 20.00th=[   41],
     | 30.00th=[   47], 40.00th=[   53], 50.00th=[   58], 60.00th=[   65],
     | 70.00th=[   73], 80.00th=[   84], 90.00th=[  103], 95.00th=[  121],
     | 99.00th=[  194], 99.50th=[  726], 99.90th=[ 2333], 99.95th=[ 2601],
     | 99.99th=[ 2802]
   bw (  KiB/s): min= 1723, max=33933, per=100.00%, avg=15445.88, stdev=4664.18, samples=659
   iops        : min=    1, max=   33, avg=14.49, stdev= 4.60, samples=659
  lat (msec)   : 20=0.64%, 50=35.80%, 100=52.83%, 250=10.10%, 500=0.12%
  lat (msec)   : 750=0.02%, 1000=0.06%, 2000=0.27%, >=2000=0.16%
  cpu          : usr=0.74%, sys=45.37%, ctx=25474, majf=38, minf=1310952
  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=13.7MiB/s (14.4MB/s), 13.7MiB/s-13.7MiB/s (14.4MB/s-14.4MB/s), io=5120MiB (5369MB), run=373956-373956msec