== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:57:43 (1763355463)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.17274 s, 17.0 MB/s
llite.lustre-ffff968358fec800.read_ahead_stats=clear
llite.lustre-ffff968358fec800.read_ahead_stats=
snapshot_time             1763355476.510388634 secs.nsecs
start_time                1763355471.254953094 secs.nsecs
elapsed_time              5.255435540 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/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=292913: Mon Nov 17 00:04:33 2025
  read: IOPS=12, BW=12.0MiB/s (13.6MB/s)(5120MiB/394220msec)
    clat (msec): min=38, max=248, avg=76.81, stdev=38.57
     lat (msec): min=38, max=248, avg=76.81, stdev=38.57
    clat percentiles (msec):
     |  1.00th=[   42],  5.00th=[   49], 10.00th=[   51], 20.00th=[   53],
     | 30.00th=[   55], 40.00th=[   57], 50.00th=[   61], 60.00th=[   65],
     | 70.00th=[   70], 80.00th=[  113], 90.00th=[  134], 95.00th=[  163],
     | 99.00th=[  207], 99.50th=[  220], 99.90th=[  239], 99.95th=[  245],
     | 99.99th=[  249]
   bw (  KiB/s): min= 4096, max=22528, per=100.00%, avg=13334.95, stdev=5352.56, samples=786
   iops        : min=    4, max=   22, avg=13.01, stdev= 5.23, samples=786
  lat (msec)   : 50=9.80%, 100=67.79%, 250=22.40%
  cpu          : usr=0.66%, sys=84.65%, ctx=12003, majf=5123, minf=1305865
  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=12.0MiB/s (13.6MB/s), 12.0MiB/s-12.0MiB/s (13.6MB/s-13.6MB/s), io=5120MiB (5369MB), run=394220-394220msec