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drm/vmwgfx: Add a mksstat counter for cotable resizes

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There's been a lot of cotable resizes on startup which we can track
by adding a mks stat to measure both the invocation count and
time spent doing cotable resizes.

This is only used if kernel is configured with CONFIG_DRM_VMWGFX_MKSSTATS
The stats are collected on the host size inside the vmware-stats.log
file.

Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Michael Banack <banackm@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Reviewed-by: Maaz Mombasawala <mombasawalam@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221022040236.616490-16-zack@kde.org
This commit is contained in:
Zack Rusin 2022-10-22 00:02:34 -04:00
parent 2e10cdc6e8
commit 4bb50606cb
3 changed files with 22 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/gpu/drm/vmwgfx/vmwgfx_cotable.c
View file

@ -33,6 +33,7 @@
#include <drm/ttm/ttm_placement.h>
#include "vmwgfx_drv.h"
#include "vmwgfx_mksstat.h"
#include "vmwgfx_resource_priv.h"
#include "vmwgfx_so.h"
@ -395,9 +396,12 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
int ret;
size_t i;
MKS_STAT_TIME_DECL(MKSSTAT_KERN_COTABLE_RESIZE);
MKS_STAT_TIME_PUSH(MKSSTAT_KERN_COTABLE_RESIZE);
ret = vmw_cotable_readback(res);
if (ret)
return ret;
goto out_done;
cur_size_read_back = vcotbl->size_read_back;
vcotbl->size_read_back = old_size_read_back;
@ -411,7 +415,7 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
true, true, vmw_bo_bo_free, &buf);
if (ret) {
DRM_ERROR("Failed initializing new cotable MOB.\n");
return ret;
goto out_done;
}
bo = &buf->base;
@ -485,6 +489,8 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
/* Release the pin acquired in vmw_bo_init */
ttm_bo_unpin(bo);
MKS_STAT_TIME_POP(MKSSTAT_KERN_COTABLE_RESIZE);
return 0;
out_map_new:
@ -494,6 +500,9 @@ static int vmw_cotable_resize(struct vmw_resource *res, size_t new_size)
ttm_bo_unreserve(bo);
vmw_bo_unreference(&buf);
out_done:
MKS_STAT_TIME_POP(MKSSTAT_KERN_COTABLE_RESIZE);
return ret;
}

2
drivers/gpu/drm/vmwgfx/vmwgfx_mksstat.h
View file

@ -29,6 +29,7 @@
#define _VMWGFX_MKSSTAT_H_
#include <asm/page.h>
#include <linux/kconfig.h>
/* Reservation marker for mksstat pid's */
#define MKSSTAT_PID_RESERVED -1
@ -41,6 +42,7 @@
typedef enum {
MKSSTAT_KERN_EXECBUF, /* vmw_execbuf_ioctl */
MKSSTAT_KERN_COTABLE_RESIZE,
MKSSTAT_KERN_COUNT /* Reserved entry; always last */
} mksstat_kern_stats_t;

16
drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
View file

@ -85,7 +85,14 @@ struct rpc_channel {
u32 cookie_low;
};
#if IS_ENABLED(CONFIG_DRM_VMWGFX_MKSSTATS)
/* Kernel mksGuestStats counter names and desciptions; same order as enum mksstat_kern_stats_t */
static const char* const mksstat_kern_name_desc[MKSSTAT_KERN_COUNT][2] =
{
{ "vmw_execbuf_ioctl", "vmw_execbuf_ioctl" },
{ "vmw_cotable_resize", "vmw_cotable_resize" },
};
#endif
/**
* vmw_open_channel
@ -695,12 +702,6 @@ static inline void hypervisor_ppn_remove(PPN64 pfn)
/* Header to the text description of mksGuestStat instance descriptor */
#define MKSSTAT_KERNEL_DESCRIPTION "vmwgfx"
/* Kernel mksGuestStats counter names and desciptions; same order as enum mksstat_kern_stats_t */
static const char* const mksstat_kern_name_desc[MKSSTAT_KERN_COUNT][2] =
{
{ "vmw_execbuf_ioctl", "vmw_execbuf_ioctl" },
};
/**
* mksstat_init_record: Initializes an MKSGuestStatCounter-based record
* for the respective mksGuestStat index.
@ -786,6 +787,7 @@ static int mksstat_init_kern_id(struct page **ppage)
/* Set up all kernel-internal counters and corresponding structures */
pstrs_acc = pstrs;
pstrs_acc = mksstat_init_record_time(MKSSTAT_KERN_EXECBUF, pstat, pinfo, pstrs_acc);
pstrs_acc = mksstat_init_record_time(MKSSTAT_KERN_COTABLE_RESIZE, pstat, pinfo, pstrs_acc);
/* Add new counters above, in their order of appearance in mksstat_kern_stats_t */