== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:57:00 (1777003020)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.67599 s, 18.5 MB/s
llite.lustre-ffff8db2dfb79000.read_ahead_stats=clear
llite.lustre-ffff8db2dfb79000.read_ahead_stats=
snapshot_time             1777003036.693565103 secs.nsecs
start_time                1777003028.122268691 secs.nsecs
elapsed_time              8.571296412 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=228425: Fri Apr 24 00:04:58 2026
  read: IOPS=11, BW=11.2MiB/s (11.7MB/s)(5120MiB/458218msec)
    clat (msec): min=54, max=221, avg=89.26, stdev=27.09
     lat (msec): min=54, max=221, avg=89.26, stdev=27.09
    clat percentiles (msec):
     |  1.00th=[   63],  5.00th=[   67], 10.00th=[   70], 20.00th=[   72],
     | 30.00th=[   74], 40.00th=[   77], 50.00th=[   79], 60.00th=[   82],
     | 70.00th=[   86], 80.00th=[   97], 90.00th=[  142], 95.00th=[  150],
     | 99.00th=[  174], 99.50th=[  184], 99.90th=[  205], 99.95th=[  207],
     | 99.99th=[  222]
   bw (  KiB/s): min= 4087, max=16384, per=100.00%, avg=11481.97, stdev=2970.97, samples=912
   iops        : min=    3, max=   16, avg=10.92, stdev= 2.94, samples=912
  lat (msec)   : 100=81.05%, 250=18.95%
  cpu          : usr=0.63%, sys=77.31%, ctx=14732, majf=5186, minf=1305803
  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=11.2MiB/s (11.7MB/s), 11.2MiB/s-11.2MiB/s (11.7MB/s-11.7MB/s), io=5120MiB (5369MB), run=458218-458218msec