== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 20:59:21 (1763344761)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.32723 s, 11.2 MB/s
llite.lustre-ffff9119c8d7b000.read_ahead_stats=clear
llite.lustre-ffff9119c8d7b000.read_ahead_stats=
snapshot_time             1763344782.082990389 secs.nsecs
start_time                1763344775.307135987 secs.nsecs
elapsed_time              6.775854402 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=292941: Sun Nov 16 21:06:01 2025
  read: IOPS=13, BW=13.7MiB/s (14.4MB/s)(5120MiB/373643msec)
    clat (msec): min=14, max=2584, avg=72.65, stdev=62.16
     lat (msec): min=14, max=2584, avg=72.66, stdev=62.16
    clat percentiles (msec):
     |  1.00th=[   19],  5.00th=[   28], 10.00th=[   34], 20.00th=[   42],
     | 30.00th=[   50], 40.00th=[   56], 50.00th=[   63], 60.00th=[   72],
     | 70.00th=[   83], 80.00th=[   95], 90.00th=[  118], 95.00th=[  140],
     | 99.00th=[  220], 99.50th=[  257], 99.90th=[  827], 99.95th=[ 1234],
     | 99.99th=[ 2601]
   bw (  KiB/s): min= 2035, max=46376, per=100.00%, avg=14335.07, stdev=4656.94, samples=711
   iops        : min=    1, max=   45, avg=13.39, stdev= 4.60, samples=711
  lat (msec)   : 20=1.37%, 50=30.31%, 100=51.31%, 250=16.45%, 500=0.43%
  lat (msec)   : 750=0.02%, 1000=0.02%, 2000=0.08%, >=2000=0.02%
  cpu          : usr=0.77%, sys=41.41%, ctx=26525, majf=548, minf=1310443
  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=13.7MiB/s (14.4MB/s), 13.7MiB/s-13.7MiB/s (14.4MB/s-14.4MB/s), io=5120MiB (5369MB), run=373643-373643msec