== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 00:35:17 (1763357717)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 7.16732 s, 14.6 MB/s
llite.lustre-ffff9a8c99380800.read_ahead_stats=clear
llite.lustre-ffff9a8c99380800.read_ahead_stats=
snapshot_time             1763357733.927394124 secs.nsecs
start_time                1763357726.489436825 secs.nsecs
elapsed_time              7.437957299 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 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=293325: Mon Nov 17 00:42:02 2025
  read: IOPS=13, BW=13.3MiB/s (13.9MB/s)(5120MiB/385923msec)
    clat (msec): min=10, max=4047, avg=75.20, stdev=118.05
     lat (msec): min=10, max=4047, avg=75.20, stdev=118.05
    clat percentiles (msec):
     |  1.00th=[   25],  5.00th=[   39], 10.00th=[   42], 20.00th=[   47],
     | 30.00th=[   50], 40.00th=[   52], 50.00th=[   58], 60.00th=[   71],
     | 70.00th=[   81], 80.00th=[   90], 90.00th=[  111], 95.00th=[  128],
     | 99.00th=[  228], 99.50th=[  309], 99.90th=[ 2400], 99.95th=[ 2970],
     | 99.99th=[ 4044]
   bw (  KiB/s): min= 1899, max=34816, per=100.00%, avg=14337.26, stdev=5542.15, samples=714
   iops        : min=    1, max=   34, avg=13.71, stdev= 5.52, samples=714
  lat (msec)   : 20=0.82%, 50=33.34%, 100=51.31%, 250=13.67%, 500=0.61%
  lat (msec)   : 750=0.04%, 1000=0.02%, 2000=0.06%, >=2000=0.14%
  cpu          : usr=0.67%, sys=82.13%, ctx=37374, majf=1065, minf=1309924
  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 (13.9MB/s), 13.3MiB/s-13.3MiB/s (13.9MB/s-13.9MB/s), io=5120MiB (5369MB), run=385923-385923msec