== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 14:12:35 (1772910755)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.7057 s, 18.4 MB/s
llite.lustre-ffff8c71bc666800.read_ahead_stats=clear
llite.lustre-ffff8c71bc666800.read_ahead_stats=
snapshot_time             1772910770.379042245 secs.nsecs
start_time                1772910762.953295652 secs.nsecs
elapsed_time              7.425746593 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          4 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=230949: Sat Mar  7 14:19:57 2026
  read: IOPS=12, BW=12.1MiB/s (12.7MB/s)(5120MiB/424106msec)
    clat (msec): min=47, max=293, avg=82.66, stdev=38.02
     lat (msec): min=47, max=293, avg=82.66, stdev=38.02
    clat percentiles (msec):
     |  1.00th=[   51],  5.00th=[   57], 10.00th=[   58], 20.00th=[   60],
     | 30.00th=[   61], 40.00th=[   63], 50.00th=[   66], 60.00th=[   71],
     | 70.00th=[   77], 80.00th=[   89], 90.00th=[  150], 95.00th=[  159],
     | 99.00th=[  213], 99.50th=[  249], 99.90th=[  279], 99.95th=[  284],
     | 99.99th=[  292]
   bw (  KiB/s): min= 2048, max=20480, per=100.00%, avg=12401.66, stdev=4591.62, samples=845
   iops        : min=    2, max=   20, avg=12.10, stdev= 4.49, samples=845
  lat (msec)   : 50=1.09%, 100=80.18%, 250=18.26%, 500=0.47%
  cpu          : usr=0.58%, sys=88.31%, ctx=14113, majf=5120, minf=1305869
  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=12.1MiB/s (12.7MB/s), 12.1MiB/s-12.1MiB/s (12.7MB/s-12.7MB/s), io=5120MiB (5369MB), run=424106-424106msec