== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:32:55 (1775874775)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.83747 s, 18.0 MB/s
llite.lustre-ffff965ae6c43000.read_ahead_stats=clear
llite.lustre-ffff965ae6c43000.read_ahead_stats=
snapshot_time             1775874794.187812973 secs.nsecs
start_time                1775874783.792745357 secs.nsecs
elapsed_time              10.395067616 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          6 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=230341: Fri Apr 10 22:41:20 2026
  read: IOPS=10, BW=10.6MiB/s (11.1MB/s)(5120MiB/482946msec)
    clat (msec): min=57, max=229, avg=94.09, stdev=25.71
     lat (msec): min=57, max=229, avg=94.09, stdev=25.71
    clat percentiles (msec):
     |  1.00th=[   68],  5.00th=[   72], 10.00th=[   74], 20.00th=[   78],
     | 30.00th=[   81], 40.00th=[   83], 50.00th=[   86], 60.00th=[   89],
     | 70.00th=[   93], 80.00th=[  101], 90.00th=[  144], 95.00th=[  155],
     | 99.00th=[  176], 99.50th=[  184], 99.90th=[  201], 99.95th=[  209],
     | 99.99th=[  230]
   bw (  KiB/s): min= 4047, max=16384, per=100.00%, avg=10890.71, stdev=2534.31, samples=960
   iops        : min=    3, max=   16, avg=10.23, stdev= 2.51, samples=960
  lat (msec)   : 100=79.88%, 250=20.12%
  cpu          : usr=0.58%, sys=70.21%, ctx=15815, majf=5231, minf=1305756
  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=10.6MiB/s (11.1MB/s), 10.6MiB/s-10.6MiB/s (11.1MB/s-11.1MB/s), io=5120MiB (5369MB), run=482946-482946msec