== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 13:52:49 (1772477569)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.59797 s, 15.9 MB/s
llite.lustre-ffff90416b44f000.read_ahead_stats=clear
llite.lustre-ffff90416b44f000.read_ahead_stats=
snapshot_time             1772477586.636473574 secs.nsecs
start_time                1772477577.847829904 secs.nsecs
elapsed_time              8.788643670 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=226078: Mon Mar  2 14:00:36 2026
  read: IOPS=11, BW=11.4MiB/s (12.0MB/s)(5120MiB/447180msec)
    clat (msec): min=43, max=294, avg=87.15, stdev=43.91
     lat (msec): min=43, max=294, avg=87.15, stdev=43.91
    clat percentiles (msec):
     |  1.00th=[   52],  5.00th=[   56], 10.00th=[   60], 20.00th=[   63],
     | 30.00th=[   65], 40.00th=[   67], 50.00th=[   70], 60.00th=[   72],
     | 70.00th=[   77], 80.00th=[   87], 90.00th=[  159], 95.00th=[  188],
     | 99.00th=[  243], 99.50th=[  255], 99.90th=[  284], 99.95th=[  288],
     | 99.99th=[  296]
   bw (  KiB/s): min= 2048, max=20480, per=100.00%, avg=11760.86, stdev=4630.58, samples=891
   iops        : min=    2, max=   20, avg=11.47, stdev= 4.53, samples=891
  lat (msec)   : 50=0.61%, 100=80.66%, 250=18.09%, 500=0.64%
  cpu          : usr=0.61%, sys=87.83%, ctx=14164, majf=5120, 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=11.4MiB/s (12.0MB/s), 11.4MiB/s-11.4MiB/s (12.0MB/s-12.0MB/s), io=5120MiB (5369MB), run=447180-447180msec