== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:22:19 (1763349739)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.3804 s, 9.2 MB/s
llite.lustre-ffff97ddcaa78800.read_ahead_stats=clear
llite.lustre-ffff97ddcaa78800.read_ahead_stats=
snapshot_time             1763349766.309907484 secs.nsecs
start_time                1763349756.175206516 secs.nsecs
elapsed_time              10.134700968 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          7 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=292695: Sun Nov 16 22:29:34 2025
  read: IOPS=12, BW=12.8MiB/s (13.4MB/s)(5120MiB/399987msec)
    clat (msec): min=15, max=3522, avg=77.62, stdev=160.25
     lat (msec): min=15, max=3522, avg=77.63, stdev=160.25
    clat percentiles (msec):
     |  1.00th=[   20],  5.00th=[   26], 10.00th=[   31], 20.00th=[   39],
     | 30.00th=[   46], 40.00th=[   52], 50.00th=[   59], 60.00th=[   68],
     | 70.00th=[   78], 80.00th=[   90], 90.00th=[  110], 95.00th=[  131],
     | 99.00th=[  222], 99.50th=[ 1502], 99.90th=[ 2534], 99.95th=[ 3171],
     | 99.99th=[ 3507]
   bw (  KiB/s): min= 1889, max=35583, per=100.00%, avg=14926.27, stdev=5101.58, samples=684
   iops        : min=    1, max=   34, avg=13.95, stdev= 5.03, samples=684
  lat (msec)   : 20=1.19%, 50=36.05%, 100=49.20%, 250=12.71%, 500=0.14%
  lat (msec)   : 750=0.02%, 1000=0.04%, 2000=0.47%, >=2000=0.18%
  cpu          : usr=0.72%, sys=39.39%, ctx=23738, majf=47, minf=1310941
  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=12.8MiB/s (13.4MB/s), 12.8MiB/s-12.8MiB/s (13.4MB/s-13.4MB/s), io=5120MiB (5369MB), run=399987-399987msec