Revision 82c99f7a81f28f8c1be5f701c8377d14c4075b10 authored by Harry Pan on 24 April 2019, 14:50:33 UTC, committed by Ingo Molnar on 25 April 2019, 06:59:31 UTC
Kaby Lake (and Coffee Lake) has PC8/PC9/PC10 residency counters. This patch updates the list of Kaby/Coffee Lake PMU event counters from the snb_cstates[] list of events to the hswult_cstates[] list of events, which keeps all previously supported events and also adds the PKG_C8, PKG_C9 and PKG_C10 residency counters. This allows user space tools to profile them through the perf interface. Signed-off-by: Harry Pan <harry.pan@intel.com> Cc: <stable@vger.kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: gs0622@gmail.com Link: http://lkml.kernel.org/r/20190424145033.1924-1-harry.pan@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
1 parent cd8dead
request.txt
struct request documentation
Jens Axboe <jens.axboe@oracle.com> 27/05/02
1.0
Index
2.0 Struct request members classification
2.1 struct request members explanation
3.0
2.0
Short explanation of request members
Classification flags:
D driver member
B block layer member
I I/O scheduler member
Unless an entry contains a D classification, a device driver must not access
this member. Some members may contain D classifications, but should only be
access through certain macros or functions (eg ->flags).
<linux/blkdev.h>
2.1
Member Flag Comment
------ ---- -------
struct list_head queuelist BI Organization on various internal
queues
void *elevator_private I I/O scheduler private data
unsigned char cmd[16] D Driver can use this for setting up
a cdb before execution, see
blk_queue_prep_rq
unsigned long flags DBI Contains info about data direction,
request type, etc.
int rq_status D Request status bits
kdev_t rq_dev DBI Target device
int errors DB Error counts
sector_t sector DBI Target location
unsigned long hard_nr_sectors B Used to keep sector sane
unsigned long nr_sectors DBI Total number of sectors in request
unsigned long hard_nr_sectors B Used to keep nr_sectors sane
unsigned short nr_phys_segments DB Number of physical scatter gather
segments in a request
unsigned short nr_hw_segments DB Number of hardware scatter gather
segments in a request
unsigned int current_nr_sectors DB Number of sectors in first segment
of request
unsigned int hard_cur_sectors B Used to keep current_nr_sectors sane
int tag DB TCQ tag, if assigned
void *special D Free to be used by driver
char *buffer D Map of first segment, also see
section on bouncing SECTION
struct completion *waiting D Can be used by driver to get signalled
on request completion
struct bio *bio DBI First bio in request
struct bio *biotail DBI Last bio in request
struct request_queue *q DB Request queue this request belongs to
struct request_list *rl B Request list this request came from
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