== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 22:20:13 (1767324013)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.96575 s, 17.6 MB/s
llite.lustre-ffff94e550982800.read_ahead_stats=clear
llite.lustre-ffff94e550982800.read_ahead_stats=
snapshot_time             1767324030.815804085 secs.nsecs
start_time                1767324021.933637915 secs.nsecs
elapsed_time              8.882166170 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          38 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=228977: Thu Jan  1 22:26:49 2026
  read: IOPS=13, BW=13.7MiB/s (14.3MB/s)(5120MiB/374815msec)
    clat (msec): min=22, max=214, avg=72.96, stdev=24.67
     lat (msec): min=22, max=214, avg=72.96, stdev=24.67
    clat percentiles (msec):
     |  1.00th=[   48],  5.00th=[   53], 10.00th=[   55], 20.00th=[   57],
     | 30.00th=[   59], 40.00th=[   61], 50.00th=[   64], 60.00th=[   66],
     | 70.00th=[   70], 80.00th=[   83], 90.00th=[  120], 95.00th=[  127],
     | 99.00th=[  150], 99.50th=[  159], 99.90th=[  188], 99.95th=[  197],
     | 99.99th=[  215]
   bw (  KiB/s): min= 6059, max=20480, per=100.00%, avg=14044.83, stdev=3842.07, samples=745
   iops        : min=    5, max=   20, avg=13.40, stdev= 3.79, samples=745
  lat (msec)   : 50=1.93%, 100=81.64%, 250=16.43%
  cpu          : usr=0.70%, sys=71.27%, ctx=14926, majf=5797, minf=1305192
  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 (14.3MB/s), 13.7MiB/s-13.7MiB/s (14.3MB/s-14.3MB/s), io=5120MiB (5369MB), run=374815-374815msec