== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 12:39:36 (1772473176)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.6041 s, 8.3 MB/s
llite.lustre-ffff9caef697b800.read_ahead_stats=clear
llite.lustre-ffff9caef697b800.read_ahead_stats=
snapshot_time             1772473214.338835073 secs.nsecs
start_time                1772473195.635671063 secs.nsecs
elapsed_time              18.703164010 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          41 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=224643: Mon Mar  2 12:51:27 2026
  read: IOPS=7, BW=7871KiB/s (8060kB/s)(5120MiB/666132msec)
    clat (msec): min=29, max=414, avg=129.11, stdev=48.19
     lat (msec): min=29, max=414, avg=129.11, stdev=48.19
    clat percentiles (msec):
     |  1.00th=[   59],  5.00th=[   69], 10.00th=[   77], 20.00th=[   89],
     | 30.00th=[   99], 40.00th=[  109], 50.00th=[  121], 60.00th=[  133],
     | 70.00th=[  148], 80.00th=[  165], 90.00th=[  194], 95.00th=[  218],
     | 99.00th=[  284], 99.50th=[  321], 99.90th=[  372], 99.95th=[  384],
     | 99.99th=[  414]
   bw (  KiB/s): min= 2011, max=16384, per=100.00%, avg=7939.95, stdev=2670.61, samples=1313
   iops        : min=    1, max=   16, avg= 7.10, stdev= 2.72, samples=1313
  lat (msec)   : 50=0.10%, 100=31.29%, 250=66.52%, 500=2.09%
  cpu          : usr=0.40%, sys=33.66%, ctx=25356, majf=6693, minf=1304296
  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=7871KiB/s (8060kB/s), 7871KiB/s-7871KiB/s (8060kB/s-8060kB/s), io=5120MiB (5369MB), run=666132-666132msec