== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:26:48 (1770690408)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.2319 s, 16.8 MB/s
llite.lustre-ffff9a3166b23800.read_ahead_stats=clear
llite.lustre-ffff9a3166b23800.read_ahead_stats=
snapshot_time             1770690423.159718346 secs.nsecs
start_time                1770690416.314963177 secs.nsecs
elapsed_time              6.844755169 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          5 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=225105: Mon Feb  9 21:33:19 2026
  read: IOPS=13, BW=13.7MiB/s (14.4MB/s)(5120MiB/373752msec)
    clat (msec): min=11, max=179, avg=72.78, stdev=26.16
     lat (msec): min=11, max=179, avg=72.78, stdev=26.16
    clat percentiles (msec):
     |  1.00th=[   44],  5.00th=[   50], 10.00th=[   52], 20.00th=[   54],
     | 30.00th=[   56], 40.00th=[   58], 50.00th=[   62], 60.00th=[   65],
     | 70.00th=[   72], 80.00th=[  108], 90.00th=[  118], 95.00th=[  124],
     | 99.00th=[  140], 99.50th=[  150], 99.90th=[  167], 99.95th=[  174],
     | 99.99th=[  180]
   bw (  KiB/s): min= 2035, max=20480, per=100.00%, avg=14069.91, stdev=4419.86, samples=744
   iops        : min=    1, max=   20, avg=13.51, stdev= 4.35, samples=744
  lat (msec)   : 20=0.02%, 50=6.80%, 100=71.17%, 250=22.01%
  cpu          : usr=0.65%, sys=76.68%, ctx=14781, majf=5586, minf=1305402
  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=373752-373752msec