== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:46:10 (1777027570)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.3773 s, 19.5 MB/s
llite.lustre-ffff952e344c8800.read_ahead_stats=clear
llite.lustre-ffff952e344c8800.read_ahead_stats=
snapshot_time             1777027586.051233766 secs.nsecs
start_time                1777027577.995418821 secs.nsecs
elapsed_time              8.055814945 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=234846: Fri Apr 24 06:52:44 2026
  read: IOPS=13, BW=13.6MiB/s (14.3MB/s)(5120MiB/375811msec)
    clat (msec): min=43, max=219, avg=73.20, stdev=27.62
     lat (msec): min=43, max=219, avg=73.21, stdev=27.62
    clat percentiles (msec):
     |  1.00th=[   50],  5.00th=[   54], 10.00th=[   55], 20.00th=[   57],
     | 30.00th=[   59], 40.00th=[   61], 50.00th=[   63], 60.00th=[   65],
     | 70.00th=[   67], 80.00th=[   73], 90.00th=[  124], 95.00th=[  130],
     | 99.00th=[  171], 99.50th=[  186], 99.90th=[  205], 99.95th=[  218],
     | 99.99th=[  220]
   bw (  KiB/s): min= 4096, max=20480, per=100.00%, avg=13992.72, stdev=4297.26, samples=749
   iops        : min=    4, max=   20, avg=13.64, stdev= 4.20, samples=749
  lat (msec)   : 50=1.25%, 100=80.76%, 250=17.99%
  cpu          : usr=0.66%, sys=86.67%, ctx=13376, majf=5122, minf=1305867
  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=13.6MiB/s (14.3MB/s), 13.6MiB/s-13.6MiB/s (14.3MB/s-14.3MB/s), io=5120MiB (5369MB), run=375811-375811msec