Revision 3763a24c727ecf236358a81ee749e5fcab1c972a authored by Arjun Roy on 08 June 2020, 01:54:41 UTC, committed by David S. Miller on 09 June 2020, 02:08:17 UTC
Use vm_insert_pages() for tcp receive zerocopy. Spin lock cycles (as reported by perf) drop from a couple of percentage points to a fraction of a percent. This results in a roughly 6% increase in efficiency, measured roughly as zerocopy receive count divided by CPU utilization. The intention of this patchset is to reduce atomic ops for tcp zerocopy receives, which normally hits the same spinlock multiple times consecutively. [akpm@linux-foundation.org: suppress gcc-7.2.0 warning] Link: http://lkml.kernel.org/r/20200128025958.43490-3-arjunroy.kdev@gmail.com Signed-off-by: Arjun Roy <arjunroy@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Cc: David Miller <davem@davemloft.net> Cc: Matthew Wilcox <willy@infradead.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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include | ||
.gitignore | -rw-r--r-- | 94 bytes |
Kconfig | -rw-r--r-- | 7.1 KB |
Makefile | -rw-r--r-- | 2.9 KB |
default_cpio_list | -rw-r--r-- | 153 bytes |
gen_init_cpio.c | -rw-r--r-- | 12.8 KB |
gen_initramfs.sh | -rwxr-xr-x | 5.7 KB |
initramfs_data.S | -rw-r--r-- | 1.2 KB |
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