== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 12:56:43 (1779987403)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.4439 s, 8.4 MB/s
llite.lustre-ffff9b5b4d91e000.read_ahead_stats=clear
llite.lustre-ffff9b5b4d91e000.read_ahead_stats=
snapshot_time             1779987434.348280328 secs.nsecs
start_time                1779987420.833622930 secs.nsecs
elapsed_time              13.514657398 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=292734: Thu May 28 13:13:02 2026
  read: IOPS=5, BW=5579KiB/s (5713kB/s)(5120MiB/939798msec)
    clat (msec): min=30, max=1827, avg=182.97, stdev=60.99
     lat (msec): min=30, max=1827, avg=182.97, stdev=60.99
    clat percentiles (msec):
     |  1.00th=[   87],  5.00th=[  108], 10.00th=[  121], 20.00th=[  138],
     | 30.00th=[  150], 40.00th=[  163], 50.00th=[  176], 60.00th=[  188],
     | 70.00th=[  203], 80.00th=[  222], 90.00th=[  255], 95.00th=[  284],
     | 99.00th=[  359], 99.50th=[  393], 99.90th=[  498], 99.95th=[  584],
     | 99.99th=[ 1821]
   bw (  KiB/s): min= 1774, max=12263, per=100.00%, avg=5609.59, stdev=1656.45, samples=1858
   iops        : min=    1, max=   11, avg= 4.83, stdev= 1.72, samples=1858
  lat (msec)   : 50=0.10%, 100=2.85%, 250=85.76%, 500=11.19%, 750=0.08%
  lat (msec)   : 2000=0.02%
  cpu          : usr=0.32%, sys=35.12%, ctx=29106, majf=5427, minf=1305561
  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=5579KiB/s (5713kB/s), 5579KiB/s-5579KiB/s (5713kB/s-5713kB/s), io=5120MiB (5369MB), run=939798-939798msec