== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 01:33:41 (1773207221)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1431 s, 8.0 MB/s
llite.lustre-ffff9d579219e000.read_ahead_stats=clear
llite.lustre-ffff9d579219e000.read_ahead_stats=
snapshot_time             1773207264.324722241 secs.nsecs
start_time                1773207241.085226221 secs.nsecs
elapsed_time              23.239496020 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          19 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=225656: Wed Mar 11 01:51:46 2026
  read: IOPS=4, BW=5071KiB/s (5192kB/s)(5120MiB/1033982msec)
    clat (msec): min=43, max=510, avg=201.30, stdev=55.04
     lat (msec): min=43, max=510, avg=201.31, stdev=55.04
    clat percentiles (msec):
     |  1.00th=[  102],  5.00th=[  128], 10.00th=[  138], 20.00th=[  155],
     | 30.00th=[  167], 40.00th=[  180], 50.00th=[  194], 60.00th=[  209],
     | 70.00th=[  226], 80.00th=[  245], 90.00th=[  275], 95.00th=[  300],
     | 99.00th=[  359], 99.50th=[  380], 99.90th=[  439], 99.95th=[  451],
     | 99.99th=[  510]
   bw (  KiB/s): min= 1965, max=12288, per=100.00%, avg=5092.01, stdev=1419.22, samples=2043
   iops        : min=    1, max=   12, avg= 4.27, stdev= 1.48, samples=2043
  lat (msec)   : 50=0.02%, 100=0.86%, 250=81.50%, 500=17.58%, 750=0.04%
  cpu          : usr=0.28%, sys=29.25%, ctx=35332, majf=5715, minf=1305274
  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=5071KiB/s (5192kB/s), 5071KiB/s-5071KiB/s (5192kB/s-5192kB/s), io=5120MiB (5369MB), run=1033982-1033982msec