== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 02:08:44 (1763881724)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.4905 s, 19.1 MB/s
llite.lustre-ffff8c584ff70000.read_ahead_stats=clear
llite.lustre-ffff8c584ff70000.read_ahead_stats=
snapshot_time             1763881738.814809194 secs.nsecs
start_time                1763881732.024368522 secs.nsecs
elapsed_time              6.790440672 secs.nsecs
hits                      25500 samples [pages]
misses                    100 samples [pages]
readpage_not_consecutive  100 samples [pages]
failed_to_fast_read       100 samples [pages]
mmap_range_read           100 samples [pages]
readahead_pages           100 samples [pages] 255 255 25500
/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=304424: Sun Nov 23 02:15:38 2025
  read: IOPS=12, BW=12.9MiB/s (13.5MB/s)(5120MiB/396758msec)
    clat (msec): min=38, max=234, avg=77.33, stdev=28.80
     lat (msec): min=38, max=234, avg=77.33, stdev=28.80
    clat percentiles (msec):
     |  1.00th=[   41],  5.00th=[   48], 10.00th=[   51], 20.00th=[   56],
     | 30.00th=[   62], 40.00th=[   66], 50.00th=[   69], 60.00th=[   75],
     | 70.00th=[   84], 80.00th=[  103], 90.00th=[  108], 95.00th=[  113],
     | 99.00th=[  228], 99.50th=[  230], 99.90th=[  232], 99.95th=[  232],
     | 99.99th=[  234]
   bw (  KiB/s): min= 4096, max=26624, per=100.00%, avg=13251.01, stdev=3988.96, samples=791
   iops        : min=    4, max=   26, avg=12.94, stdev= 3.90, samples=791
  lat (msec)   : 50=9.98%, 100=65.41%, 250=24.61%
  cpu          : usr=0.48%, sys=84.66%, ctx=11870, majf=5124, 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=12.9MiB/s (13.5MB/s), 12.9MiB/s-12.9MiB/s (13.5MB/s-13.5MB/s), io=5120MiB (5369MB), run=396758-396758msec