== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:25:38 (1775877938)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.03315 s, 17.4 MB/s
llite.lustre-ffff953f5e259800.read_ahead_stats=clear
llite.lustre-ffff953f5e259800.read_ahead_stats=
snapshot_time             1775877954.011931988 secs.nsecs
start_time                1775877945.907042649 secs.nsecs
elapsed_time              8.104889339 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=227326: Fri Apr 10 23:32:45 2026
  read: IOPS=12, BW=12.5MiB/s (13.1MB/s)(5120MiB/408812msec)
    clat (msec): min=42, max=213, avg=79.67, stdev=30.74
     lat (msec): min=42, max=213, avg=79.67, stdev=30.74
    clat percentiles (msec):
     |  1.00th=[   51],  5.00th=[   55], 10.00th=[   58], 20.00th=[   61],
     | 30.00th=[   63], 40.00th=[   65], 50.00th=[   68], 60.00th=[   70],
     | 70.00th=[   74], 80.00th=[   94], 90.00th=[  134], 95.00th=[  142],
     | 99.00th=[  186], 99.50th=[  194], 99.90th=[  205], 99.95th=[  211],
     | 99.99th=[  213]
   bw (  KiB/s): min= 4087, max=20480, per=100.00%, avg=12859.23, stdev=4139.09, samples=815
   iops        : min=    3, max=   20, avg=12.47, stdev= 4.07, samples=815
  lat (msec)   : 50=0.94%, 100=79.79%, 250=19.28%
  cpu          : usr=0.65%, sys=84.12%, ctx=13846, majf=5147, minf=1305841
  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=12.5MiB/s (13.1MB/s), 12.5MiB/s-12.5MiB/s (13.1MB/s-13.1MB/s), io=5120MiB (5369MB), run=408812-408812msec