== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:47:46 (1763347666)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.7946 s, 8.2 MB/s
llite.lustre-ffff9093c941e000.read_ahead_stats=clear
llite.lustre-ffff9093c941e000.read_ahead_stats=
snapshot_time             1763347693.346346882 secs.nsecs
start_time                1763347684.420562644 secs.nsecs
elapsed_time              8.925784238 secs.nsecs
hits                      25568 samples [pages]
misses                    32 samples [pages]
zero_size_window          10 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       35 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           36 samples [pages] 8 4096 25568
/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=294154: Sun Nov 16 21:54:44 2025
  read: IOPS=13, BW=13.3MiB/s (13.9MB/s)(5120MiB/384844msec)
    clat (msec): min=14, max=2608, avg=74.76, stdev=130.52
     lat (msec): min=14, max=2608, avg=74.76, stdev=130.52
    clat percentiles (msec):
     |  1.00th=[   21],  5.00th=[   28], 10.00th=[   33], 20.00th=[   41],
     | 30.00th=[   47], 40.00th=[   53], 50.00th=[   60], 60.00th=[   68],
     | 70.00th=[   77], 80.00th=[   88], 90.00th=[  106], 95.00th=[  127],
     | 99.00th=[  234], 99.50th=[  802], 99.90th=[ 2198], 99.95th=[ 2366],
     | 99.99th=[ 2601]
   bw (  KiB/s): min= 1673, max=30433, per=100.00%, avg=14985.90, stdev=4647.29, samples=677
   iops        : min=    1, max=   29, avg=14.02, stdev= 4.58, samples=677
  lat (msec)   : 20=0.74%, 50=34.57%, 100=52.48%, 250=11.29%, 500=0.37%
  lat (msec)   : 750=0.04%, 1000=0.08%, 2000=0.21%, >=2000=0.21%
  cpu          : usr=0.70%, sys=40.52%, ctx=26554, majf=62, minf=1310927
  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=384844-384844msec