== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:20:08 (1773742808)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 13.7077 s, 7.6 MB/s
llite.lustre-ffff959acf8c8000.read_ahead_stats=clear
llite.lustre-ffff959acf8c8000.read_ahead_stats=
snapshot_time             1773742860.667390070 secs.nsecs
start_time                1773742829.545477083 secs.nsecs
elapsed_time              31.121912987 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          25 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=227796: Tue Mar 17 06:37:38 2026
  read: IOPS=5, BW=5312KiB/s (5440kB/s)(5120MiB/986951msec)
    clat (msec): min=65, max=894, avg=192.03, stdev=63.20
     lat (msec): min=65, max=894, avg=192.04, stdev=63.20
    clat percentiles (msec):
     |  1.00th=[   93],  5.00th=[  116], 10.00th=[  127], 20.00th=[  142],
     | 30.00th=[  155], 40.00th=[  167], 50.00th=[  180], 60.00th=[  194],
     | 70.00th=[  211], 80.00th=[  234], 90.00th=[  275], 95.00th=[  313],
     | 99.00th=[  397], 99.50th=[  430], 99.90th=[  498], 99.95th=[  510],
     | 99.99th=[  894]
   bw (  KiB/s): min= 1914, max=12288, per=100.00%, avg=5342.15, stdev=1653.84, samples=1949
   iops        : min=    1, max=   12, avg= 4.55, stdev= 1.72, samples=1949
  lat (msec)   : 100=1.84%, 250=83.03%, 500=15.06%, 750=0.06%, 1000=0.02%
  cpu          : usr=0.31%, sys=31.25%, ctx=33886, majf=5534, minf=1305455
  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=5312KiB/s (5440kB/s), 5312KiB/s-5312KiB/s (5440kB/s-5440kB/s), io=5120MiB (5369MB), run=986951-986951msec