== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:25:19 (1773105919)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.91635 s, 17.7 MB/s
llite.lustre-ffff96f9c702c000.read_ahead_stats=clear
llite.lustre-ffff96f9c702c000.read_ahead_stats=
snapshot_time             1773105935.765782934 secs.nsecs
start_time                1773105927.235045861 secs.nsecs
elapsed_time              8.530737073 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 samples [pages]
failed_to_reach_end       1 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=232853: Mon Mar  9 21:32:51 2026
  read: IOPS=11, BW=11.8MiB/s (12.4MB/s)(5120MiB/432528msec)
    clat (msec): min=43, max=222, avg=84.26, stdev=30.92
     lat (msec): min=43, max=222, avg=84.26, stdev=30.92
    clat percentiles (msec):
     |  1.00th=[   55],  5.00th=[   60], 10.00th=[   63], 20.00th=[   66],
     | 30.00th=[   68], 40.00th=[   70], 50.00th=[   72], 60.00th=[   74],
     | 70.00th=[   79], 80.00th=[   89], 90.00th=[  146], 95.00th=[  155],
     | 99.00th=[  171], 99.50th=[  176], 99.90th=[  205], 99.95th=[  211],
     | 99.99th=[  222]
   bw (  KiB/s): min= 2048, max=18432, per=100.00%, avg=12153.61, stdev=3716.52, samples=862
   iops        : min=    2, max=   18, avg=11.70, stdev= 3.68, samples=862
  lat (msec)   : 50=0.14%, 100=81.76%, 250=18.11%
  cpu          : usr=0.63%, sys=83.84%, ctx=14231, majf=5169, minf=1305818
  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=11.8MiB/s (12.4MB/s), 11.8MiB/s-11.8MiB/s (12.4MB/s-12.4MB/s), io=5120MiB (5369MB), run=432528-432528msec