== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 15:05:52 (1767038752)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.68281 s, 18.5 MB/s
llite.lustre-ffff9a17e1057000.read_ahead_stats=clear
llite.lustre-ffff9a17e1057000.read_ahead_stats=
snapshot_time             1767038768.428791898 secs.nsecs
start_time                1767038759.822907842 secs.nsecs
elapsed_time              8.605884056 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=230277: Mon Dec 29 15:12:24 2025
  read: IOPS=13, BW=13.7MiB/s (14.4MB/s)(5120MiB/373828msec)
    clat (msec): min=36, max=144, avg=72.85, stdev=22.99
     lat (msec): min=36, max=144, avg=72.85, stdev=22.99
    clat percentiles (msec):
     |  1.00th=[   43],  5.00th=[   47], 10.00th=[   50], 20.00th=[   53],
     | 30.00th=[   57], 40.00th=[   62], 50.00th=[   65], 60.00th=[   70],
     | 70.00th=[   79], 80.00th=[  106], 90.00th=[  111], 95.00th=[  113],
     | 99.00th=[  120], 99.50th=[  124], 99.90th=[  136], 99.95th=[  138],
     | 99.99th=[  144]
   bw (  KiB/s): min= 8159, max=24576, per=100.00%, avg=14063.30, stdev=3974.32, samples=745
   iops        : min=    7, max=   24, avg=13.72, stdev= 3.88, samples=745
  lat (msec)   : 50=13.14%, 100=63.32%, 250=23.54%
  cpu          : usr=0.58%, sys=85.78%, ctx=13733, majf=5126, minf=1305864
  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 (14.4MB/s), 13.7MiB/s-13.7MiB/s (14.4MB/s-14.4MB/s), io=5120MiB (5369MB), run=373828-373828msec