== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:42:17 (1763350937)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.2668 s, 9.3 MB/s
llite.lustre-ffff9b64e6407000.read_ahead_stats=clear
llite.lustre-ffff9b64e6407000.read_ahead_stats=
snapshot_time             1763350962.527471840 secs.nsecs
start_time                1763350954.222141843 secs.nsecs
elapsed_time              8.305329997 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          6 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=293791: Sun Nov 16 22:49:12 2025
  read: IOPS=13, BW=13.3MiB/s (13.0MB/s)(5120MiB/383852msec)
    clat (msec): min=13, max=3035, avg=74.42, stdev=146.31
     lat (msec): min=13, max=3035, avg=74.43, stdev=146.31
    clat percentiles (msec):
     |  1.00th=[   20],  5.00th=[   27], 10.00th=[   33], 20.00th=[   40],
     | 30.00th=[   46], 40.00th=[   52], 50.00th=[   58], 60.00th=[   65],
     | 70.00th=[   73], 80.00th=[   84], 90.00th=[  102], 95.00th=[  122],
     | 99.00th=[  234], 99.50th=[ 1099], 99.90th=[ 2333], 99.95th=[ 2534],
     | 99.99th=[ 3037]
   bw (  KiB/s): min= 2035, max=34816, per=100.00%, avg=15430.86, stdev=5024.38, samples=662
   iops        : min=    1, max=   34, avg=14.45, stdev= 4.95, samples=662
  lat (msec)   : 20=1.09%, 50=36.62%, 100=51.76%, 250=9.63%, 500=0.20%
  lat (msec)   : 750=0.08%, 1000=0.12%, 2000=0.31%, >=2000=0.20%
  cpu          : usr=0.69%, sys=42.32%, ctx=25911, majf=50, minf=1310939
  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=13.3MiB/s (13.0MB/s), 13.3MiB/s-13.3MiB/s (13.0MB/s-13.0MB/s), io=5120MiB (5369MB), run=383852-383852msec