== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 08:46:58 (1775134018)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.1038 s, 8.0 MB/s
llite.lustre-ffff8b5c58457800.read_ahead_stats=clear
llite.lustre-ffff8b5c58457800.read_ahead_stats=
snapshot_time             1775134064.922178295 secs.nsecs
start_time                1775134037.629960230 secs.nsecs
elapsed_time              27.292218065 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          15 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=226036: Thu Apr  2 09:06:15 2026
  read: IOPS=4, BW=4762KiB/s (4876kB/s)(5120MiB/1100995msec)
    clat (msec): min=78, max=428, avg=214.44, stdev=49.99
     lat (msec): min=78, max=428, avg=214.44, stdev=49.99
    clat percentiles (msec):
     |  1.00th=[  120],  5.00th=[  142], 10.00th=[  155], 20.00th=[  174],
     | 30.00th=[  186], 40.00th=[  199], 50.00th=[  211], 60.00th=[  224],
     | 70.00th=[  236], 80.00th=[  255], 90.00th=[  279], 95.00th=[  305],
     | 99.00th=[  359], 99.50th=[  376], 99.90th=[  409], 99.95th=[  426],
     | 99.99th=[  430]
   bw (  KiB/s): min= 1939, max=10219, per=100.00%, avg=4777.69, stdev=1242.64, samples=2178
   iops        : min=    1, max=    9, avg= 3.98, stdev= 1.30, samples=2178
  lat (msec)   : 100=0.23%, 250=77.93%, 500=21.84%
  cpu          : usr=0.27%, sys=27.35%, ctx=37153, majf=5529, minf=1305461
  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=4762KiB/s (4876kB/s), 4762KiB/s-4762KiB/s (4876kB/s-4876kB/s), io=5120MiB (5369MB), run=1100995-1100995msec