== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 10:50:19 (1766418619)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.87453 s, 17.8 MB/s
llite.lustre-ffff9f9b435e2000.read_ahead_stats=clear
llite.lustre-ffff9f9b435e2000.read_ahead_stats=
snapshot_time             1766418634.523424207 secs.nsecs
start_time                1766418627.370693786 secs.nsecs
elapsed_time              7.152730421 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=225777: Mon Dec 22 10:56:40 2025
  read: IOPS=14, BW=14.1MiB/s (14.8MB/s)(5120MiB/363231msec)
    clat (msec): min=36, max=241, avg=70.77, stdev=32.42
     lat (msec): min=36, max=241, avg=70.78, stdev=32.42
    clat percentiles (msec):
     |  1.00th=[   40],  5.00th=[   47], 10.00th=[   48], 20.00th=[   50],
     | 30.00th=[   52], 40.00th=[   53], 50.00th=[   56], 60.00th=[   59],
     | 70.00th=[   67], 80.00th=[  109], 90.00th=[  122], 95.00th=[  130],
     | 99.00th=[  190], 99.50th=[  203], 99.90th=[  226], 99.95th=[  232],
     | 99.99th=[  241]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=14474.34, stdev=5415.68, samples=724
   iops        : min=    4, max=   22, avg=14.12, stdev= 5.29, samples=724
  lat (msec)   : 50=21.74%, 100=55.68%, 250=22.58%
  cpu          : usr=0.68%, sys=87.60%, ctx=13601, majf=5123, minf=1305865
  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=14.1MiB/s (14.8MB/s), 14.1MiB/s-14.1MiB/s (14.8MB/s-14.8MB/s), io=5120MiB (5369MB), run=363231-363231msec