== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:47:40 (1770439660)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.80467 s, 18.1 MB/s
llite.lustre-ffffa00b890a7000.read_ahead_stats=clear
llite.lustre-ffffa00b890a7000.read_ahead_stats=
snapshot_time             1770439678.025452407 secs.nsecs
start_time                1770439668.043796658 secs.nsecs
elapsed_time              9.981655749 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=237880: Fri Feb  6 23:54:23 2026
  read: IOPS=13, BW=13.4MiB/s (14.1MB/s)(5120MiB/382060msec)
    clat (msec): min=35, max=219, avg=74.46, stdev=25.45
     lat (msec): min=35, max=219, avg=74.46, stdev=25.45
    clat percentiles (msec):
     |  1.00th=[   39],  5.00th=[   47], 10.00th=[   50], 20.00th=[   55],
     | 30.00th=[   60], 40.00th=[   64], 50.00th=[   67], 60.00th=[   71],
     | 70.00th=[   79], 80.00th=[  106], 90.00th=[  112], 95.00th=[  117],
     | 99.00th=[  150], 99.50th=[  176], 99.90th=[  209], 99.95th=[  213],
     | 99.99th=[  220]
   bw (  KiB/s): min= 4096, max=26624, per=100.00%, avg=13759.58, stdev=4060.44, samples=761
   iops        : min=    4, max=   26, avg=13.43, stdev= 3.96, samples=761
  lat (msec)   : 50=10.66%, 100=66.66%, 250=22.68%
  cpu          : usr=0.52%, sys=85.44%, ctx=13919, majf=5120, minf=1305869
  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=13.4MiB/s (14.1MB/s), 13.4MiB/s-13.4MiB/s (14.1MB/s-14.1MB/s), io=5120MiB (5369MB), run=382060-382060msec