== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 23:19:59 (1763353199)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.7058 s, 15.6 MB/s
llite.lustre-ffff8ba32783f800.read_ahead_stats=clear
llite.lustre-ffff8ba32783f800.read_ahead_stats=
snapshot_time             1763353213.985386696 secs.nsecs
start_time                1763353208.599063885 secs.nsecs
elapsed_time              5.386322811 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=292401: Sun Nov 16 23:27:12 2025
  read: IOPS=12, BW=12.3MiB/s (12.9MB/s)(5120MiB/414831msec)
    clat (msec): min=10, max=490, avg=80.79, stdev=32.44
     lat (msec): min=10, max=490, avg=80.79, stdev=32.44
    clat percentiles (msec):
     |  1.00th=[   48],  5.00th=[   54], 10.00th=[   57], 20.00th=[   61],
     | 30.00th=[   63], 40.00th=[   65], 50.00th=[   67], 60.00th=[   71],
     | 70.00th=[   77], 80.00th=[  115], 90.00th=[  130], 95.00th=[  150],
     | 99.00th=[  180], 99.50th=[  188], 99.90th=[  213], 99.95th=[  245],
     | 99.99th=[  493]
   bw (  KiB/s): min= 2043, max=22528, per=100.00%, avg=12679.49, stdev=4156.10, samples=825
   iops        : min=    1, max=   22, avg=12.20, stdev= 4.09, samples=825
  lat (msec)   : 20=0.14%, 50=1.99%, 100=75.41%, 250=22.44%, 500=0.02%
  cpu          : usr=0.77%, sys=79.95%, ctx=12249, majf=5185, minf=1305803
  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=12.3MiB/s (12.9MB/s), 12.3MiB/s-12.3MiB/s (12.9MB/s-12.9MB/s), io=5120MiB (5369MB), run=414831-414831msec